possible deadlock in vprintk_emit

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 4d552acf Linux 4.19.34
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17711ce3200000
kernel config: https://syzkaller.appspot.com/x/.config?x=c95a88291f095edd
dashboard link: https://syzkaller.appspot.com/bug?extid=501ca3a2c90035beb872
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10c150f3200000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15bc0a5b200000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+501ca3...@syzkaller.appspotmail.com

RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7588 Comm: syz-executor157 Not tainted 4.19.34 #2
======================================================
WARNING: possible circular locking dependency detected
4.19.34 #2 Not tainted
------------------------------------------------------
syz-executor157/7587 is trying to acquire lock:
00000000a9fa66c1 (console_owner){-...}, at: console_trylock_spinning
kernel/printk/printk.c:1662 [inline]
00000000a9fa66c1 (console_owner){-...}, at: vprintk_emit+0x348/0x690
kernel/printk/printk.c:1926

but task is already holding lock:
000000002394c496 (&(&port->lock)->rlock){-.-.}, at: pty_write+0xff/0x200
drivers/tty/pty.c:119

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&(&port->lock)->rlock){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152
tty_port_tty_get+0x22/0x80 drivers/tty/tty_port.c:288
tty_port_default_wakeup+0x16/0x40 drivers/tty/tty_port.c:47
tty_port_tty_wakeup+0x5d/0x70 drivers/tty/tty_port.c:390
uart_write_wakeup+0x46/0x70 drivers/tty/serial/serial_core.c:103
serial8250_tx_chars+0x4a4/0xb20
drivers/tty/serial/8250/8250_port.c:1806
serial8250_handle_irq.part.0+0x1e2/0x270
drivers/tty/serial/8250/8250_port.c:1879
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1865
[inline]
serial8250_default_handle_irq+0xc5/0x150
drivers/tty/serial/8250/8250_port.c:1895
serial8250_interrupt+0x102/0x1e0
drivers/tty/serial/8250/8250_core.c:125
__handle_irq_event_percpu+0x146/0x900 kernel/irq/handle.c:149
handle_irq_event_percpu+0x74/0x160 kernel/irq/handle.c:189
handle_irq_event+0xa7/0x134 kernel/irq/handle.c:206
handle_edge_irq+0x264/0x8e0 kernel/irq/chip.c:791
generic_handle_irq_desc include/linux/irqdesc.h:155 [inline]
handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78
do_IRQ+0x99/0x1d0 arch/x86/kernel/irq.c:246
ret_from_intr+0x0/0x1e
arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline]
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160
[inline]
_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184
spin_unlock_irqrestore include/linux/spinlock.h:384 [inline]
uart_write+0x3a9/0x6f0 drivers/tty/serial/serial_core.c:615
process_output_block drivers/tty/n_tty.c:593 [inline]
n_tty_write+0x3ff/0x1100 drivers/tty/n_tty.c:2331
do_tty_write drivers/tty/tty_io.c:958 [inline]
tty_write+0x45b/0x7a0 drivers/tty/tty_io.c:1042
redirected_tty_write+0xb2/0xc0 drivers/tty/tty_io.c:1063
__vfs_write+0x116/0x820 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0xea/0x1f0 fs/read_write.c:598
__do_sys_write fs/read_write.c:610 [inline]
__se_sys_write fs/read_write.c:607 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:607
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #1 (&port_lock_key){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152
serial8250_console_write+0x7ed/0xa10
drivers/tty/serial/8250/8250_port.c:3247
univ8250_console_write+0x5f/0x70
drivers/tty/serial/8250/8250_core.c:590
call_console_drivers kernel/printk/printk.c:1729 [inline]
console_unlock+0xbbe/0x1080 kernel/printk/printk.c:2410
vprintk_emit+0x238/0x690 kernel/printk/printk.c:1927
vprintk_default+0x28/0x30 kernel/printk/printk.c:1968
vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
printk+0xba/0xed kernel/printk/printk.c:2001
register_console+0x787/0xb90 kernel/printk/printk.c:2725
univ8250_console_init+0x3e/0x4b
drivers/tty/serial/8250/8250_core.c:685
console_init+0x4f7/0x761 kernel/printk/printk.c:2811
start_kernel+0x59f/0x8c8 init/main.c:661
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470
x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243

-> #0 (console_owner){-...}:
lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903
console_trylock_spinning kernel/printk/printk.c:1683 [inline]
vprintk_emit+0x385/0x690 kernel/printk/printk.c:1926
vprintk_default+0x28/0x30 kernel/printk/printk.c:1968
vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
printk+0xba/0xed kernel/printk/printk.c:2001
fail_dump lib/fault-inject.c:44 [inline]
should_fail+0x6f1/0x85c lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0
drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe

other info that might help us debug this:

Chain exists of:
console_owner --> &port_lock_key --> &(&port->lock)->rlock

Possible unsafe locking scenario:

CPU0 CPU1
---- ----
lock(&(&port->lock)->rlock);
lock(&port_lock_key);
lock(&(&port->lock)->rlock);
lock(console_owner);

*** DEADLOCK ***

4 locks held by syz-executor157/7587:
#0: 000000008b9fa4f5 (&tty->ldisc_sem){++++}, at:
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363
#1: 00000000a1f57881 (&o_tty->termios_rwsem/1){++++}, at:
n_tty_receive_buf_common+0x89/0x2900 drivers/tty/n_tty.c:1703
#2: 00000000f4ef20cd (&ldata->output_lock){+.+.}, at: flush_echoes
drivers/tty/n_tty.c:825 [inline]
#2: 00000000f4ef20cd (&ldata->output_lock){+.+.}, at: __receive_buf
drivers/tty/n_tty.c:1646 [inline]
#2: 00000000f4ef20cd (&ldata->output_lock){+.+.}, at:
n_tty_receive_buf_common+0xb99/0x2900 drivers/tty/n_tty.c:1740
#3: 000000002394c496 (&(&port->lock)->rlock){-.-.}, at:
pty_write+0xff/0x200 drivers/tty/pty.c:119

stack backtrace:
CPU: 0 PID: 7587 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1221
check_prev_add kernel/locking/lockdep.c:1861 [inline]
check_prevs_add kernel/locking/lockdep.c:1974 [inline]
validate_chain kernel/locking/lockdep.c:2415 [inline]
__lock_acquire+0x2e6d/0x48f0 kernel/locking/lockdep.c:3411
lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903
console_trylock_spinning kernel/printk/printk.c:1683 [inline]
vprintk_emit+0x385/0x690 kernel/printk/printk.c:1926
vprintk_default+0x28/0x30 kernel/printk/printk.c:1968
vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
printk+0xba/0xed kernel/printk/printk.c:2001
fail_dump lib/fault-inject.c:44 [inline]
should_fail+0x6f1/0x85c lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7586 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7589 Comm: syz-executor157 Not tainted 4.19.34 #2
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7591 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7592 Comm: syz-executor157 Not tainted 4.19.34 #2
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7590 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7593 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7595 Comm: syz-executor157 Not tainted 4.19.34 #2
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7594 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7596 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7597 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7598 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7599 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7600 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7601 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7602 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7604 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7608 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7605 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7609 Comm: syz-executor157 Not tainted 4.19.34 #2
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7606 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7610 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memory.c:204 [inline]
__tlb_remove_page_size+0x2ee/0x510 mm/memory.c:306
__tlb_remove_page include/asm-generic/tlb.h:161 [inline]
zap_pte_range mm/memory.c:1341 [inline]
zap_pmd_range mm/memory.c:1440 [inline]
zap_pud_range mm/memory.c:1469 [inline]
zap_p4d_range mm/memory.c:1490 [inline]
unmap_page_range+0xeee/0x1e70 mm/memory.c:1511
unmap_single_vma+0x19d/0x300 mm/memory.c:1556
unmap_vmas+0xae/0x180 mm/memory.c:1586
exit_mmap+0x2c2/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1001 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1022
exit_mm kernel/exit.c:546 [inline]
do_exit+0x838/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:979
__do_sys_exit_group kernel/exit.c:990 [inline]
__se_sys_exit_group kernel/exit.c:988 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:988
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440068
Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0
0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff
ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00
RSP: 002b:00007ffc99556de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440068
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004bfcd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000
CPU: 1 PID: 7611 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
__should_failslab+0x121/0x190 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1557
slab_pre_alloc_hook mm/slab.h:424 [inline]
slab_alloc mm/slab.c:3383 [inline]
__do_kmalloc mm/slab.c:3725 [inline]
__kmalloc+0x71/0x750 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline]
__tty_buffer_request_room+0x1fb/0x5c0 drivers/tty/tty_buffer.c:268
tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:313
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x133/0x200 drivers/tty/pty.c:121
tty_put_char+0x137/0x160 drivers/tty/tty_io.c:2886
__process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726
flush_echoes drivers/tty/n_tty.c:827 [inline]
__receive_buf drivers/tty/n_tty.c:1646 [inline]
n_tty_receive_buf_common+0xbd6/0x2900 drivers/tty/n_tty.c:1740
n_tty_receive_buf+0x31/0x40 drivers/tty/n_tty.c:1769
tiocsti drivers/tty/tty_io.c:2192 [inline]
tty_ioctl+0xeb1/0x1530 drivers/tty/tty_io.c:2578
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:688
ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441419
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc99556e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419
RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007ffc99556e40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 7613 Comm: syz-executor157 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0xa/0x1b lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:3078 [inline]
prepare_alloc_pages mm/page_alloc.c:4336 [inline]
__alloc_pages_nodemask+0x1ee/0x760 mm/page_alloc.c:4383
alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
alloc_pages include/linux/gfp.h:509 [inline]
__get_free_pages+0xc/0x40 mm/page_alloc.c:4433
tlb_next_batch mm/memor

---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 1ec8f1f0 Linux 4.14.111
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14246baf200000
kernel config: https://syzkaller.appspot.com/x/.config?x=fdadf290ea9fc6f9
dashboard link: https://syzkaller.appspot.com/bug?extid=4afd53f5cc81c8427bda

compiler: gcc (GCC) 9.0.0 20181231 (experimental)

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13f8a680a00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d149fd200000

IMPORTANT: if you fix the bug, please add the following tag to the commit:

Reported-by: syzbot+4afd53...@syzkaller.appspotmail.com

RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004

RBP: 0000000000000005 R08: 0000000000000001 R09: 00000000000000c2
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401f40
R13: 0000000000401fd0 R14: 0000000000000000 R15: 0000000000000000

======================================================
WARNING: possible circular locking dependency detected

4.14.111 #1 Not tainted
------------------------------------------------------
syz-executor206/7038 is trying to acquire lock:
(console_owner){-...}, at: [<ffffffff814af951>] console_trylock_spinning
kernel/printk/printk.c:1652 [inline]
(console_owner){-...}, at: [<ffffffff814af951>] vprintk_emit
kernel/printk/printk.c:1916 [inline]
(console_owner){-...}, at: [<ffffffff814af951>] vprintk_emit+0x2f1/0x600
kernel/printk/printk.c:1882

but task is already holding lock:

(&(&port->lock)->rlock){-.-.}, at: [<ffffffff8311ed60>]
pty_write+0xe0/0x1d0 drivers/tty/pty.c:119

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&(&port->lock)->rlock){-.-.}:

lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:160
tty_port_tty_get+0x22/0x80 drivers/tty/tty_port.c:287
tty_port_default_wakeup+0x16/0x40 drivers/tty/tty_port.c:46
tty_port_tty_wakeup+0x5d/0x70 drivers/tty/tty_port.c:389
uart_write_wakeup+0x46/0x70 drivers/tty/serial/serial_core.c:116
serial8250_tx_chars+0x41c/0xa30
drivers/tty/serial/8250/8250_port.c:1810
serial8250_handle_irq.part.0+0x198/0x220
drivers/tty/serial/8250/8250_port.c:1883
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1869
[inline]
serial8250_default_handle_irq+0xa6/0x120
drivers/tty/serial/8250/8250_port.c:1899
serial8250_interrupt+0xef/0x1a0
drivers/tty/serial/8250/8250_core.c:129
__handle_irq_event_percpu+0x127/0x800 kernel/irq/handle.c:147
handle_irq_event_percpu+0x65/0x130 kernel/irq/handle.c:187
handle_irq_event+0xa7/0x134 kernel/irq/handle.c:204
handle_edge_irq+0x231/0x850 kernel/irq/chip.c:770
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x252/0x34c arch/x86/kernel/irq_64.c:78
do_IRQ+0x99/0x1e0 arch/x86/kernel/irq.c:230
ret_from_intr+0x0/0x1e
native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:57
arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:555
default_idle_call+0x36/0x90 kernel/sched/idle.c:98
cpuidle_idle_call kernel/sched/idle.c:156 [inline]
do_idle+0x262/0x3d0 kernel/sched/idle.c:246
cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:351
rest_init+0xf1/0xf6 init/main.c:435
start_kernel+0x6e2/0x700 init/main.c:709
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:380
x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:361
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240

-> #1 (&port_lock_key){-.-.}:
lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:160
serial8250_console_write+0x72c/0x950
drivers/tty/serial/8250/8250_port.c:3232
univ8250_console_write+0x5f/0x70
drivers/tty/serial/8250/8250_core.c:597
call_console_drivers kernel/printk/printk.c:1719 [inline]
console_unlock+0x9c1/0xed0 kernel/printk/printk.c:2391
vprintk_emit kernel/printk/printk.c:1917 [inline]
vprintk_emit+0x1f9/0x600 kernel/printk/printk.c:1882
vprintk_default+0x28/0x30 kernel/printk/printk.c:1957
vprintk_func+0x5d/0x159 kernel/printk/printk_safe.c:401
printk+0x9e/0xbc kernel/printk/printk.c:1990
register_console+0x61c/0x9f0 kernel/printk/printk.c:2710
univ8250_console_init+0x33/0x3f
drivers/tty/serial/8250/8250_core.c:692
console_init+0x54/0x60 kernel/printk/printk.c:2791
start_kernel+0x43f/0x700 init/main.c:635
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:380
x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:361
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240

-> #0 (console_owner){-...}:
check_prev_add kernel/locking/lockdep.c:1901 [inline]
check_prevs_add kernel/locking/lockdep.c:2018 [inline]
validate_chain kernel/locking/lockdep.c:2460 [inline]
__lock_acquire+0x2c89/0x45e0 kernel/locking/lockdep.c:3487
lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
console_trylock_spinning kernel/printk/printk.c:1673 [inline]
vprintk_emit kernel/printk/printk.c:1916 [inline]
vprintk_emit+0x32e/0x600 kernel/printk/printk.c:1882
vprintk_default+0x28/0x30 kernel/printk/printk.c:1957
vprintk_func+0x5d/0x159 kernel/printk/printk_safe.c:401
printk+0x9e/0xbc kernel/printk/printk.c:1990
fail_dump lib/fault-inject.c:44 [inline]
should_fail.cold+0xe4/0x159 lib/fault-inject.c:149
should_failslab+0xdb/0x130 mm/failslab.c:32
slab_pre_alloc_hook mm/slab.h:421 [inline]
slab_alloc mm/slab.c:3376 [inline]
__do_kmalloc mm/slab.c:3718 [inline]
__kmalloc+0x71/0x7a0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:169 [inline]
__tty_buffer_request_room+0x1a4/0x500 drivers/tty/tty_buffer.c:267
tty_insert_flip_string_fixed_flag+0x8a/0x1c0
drivers/tty/tty_buffer.c:312
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x113/0x1d0 drivers/tty/pty.c:121
tty_put_char+0x113/0x140 drivers/tty/tty_io.c:2878
__process_echoes+0x2ce/0x8a0 drivers/tty/n_tty.c:708
flush_echoes drivers/tty/n_tty.c:829 [inline]
__receive_buf drivers/tty/n_tty.c:1648 [inline]
n_tty_receive_buf_common+0x998/0x2410 drivers/tty/n_tty.c:1742
n_tty_receive_buf+0x31/0x3b drivers/tty/n_tty.c:1771
tiocsti drivers/tty/tty_io.c:2184 [inline]
tty_ioctl+0xe0e/0x1340 drivers/tty/tty_io.c:2570
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7b9/0x1070 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7

other info that might help us debug this:

Chain exists of:
console_owner --> &port_lock_key --> &(&port->lock)->rlock

Possible unsafe locking scenario:

CPU0 CPU1
---- ----
lock(&(&port->lock)->rlock);
lock(&port_lock_key);
lock(&(&port->lock)->rlock);
lock(console_owner);

*** DEADLOCK ***

4 locks held by syz-executor206/7038:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861a89e3>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&o_tty->termios_rwsem/1){++++}, at: [<ffffffff8310dd32>]
n_tty_receive_buf_common+0x92/0x2410 drivers/tty/n_tty.c:1705
#2: (&ldata->output_lock){+.+.}, at: [<ffffffff8310e5f8>] flush_echoes
drivers/tty/n_tty.c:827 [inline]
#2: (&ldata->output_lock){+.+.}, at: [<ffffffff8310e5f8>] __receive_buf
drivers/tty/n_tty.c:1648 [inline]
#2: (&ldata->output_lock){+.+.}, at: [<ffffffff8310e5f8>]
n_tty_receive_buf_common+0x958/0x2410 drivers/tty/n_tty.c:1742
#3: (&(&port->lock)->rlock){-.-.}, at: [<ffffffff8311ed60>]
pty_write+0xe0/0x1d0 drivers/tty/pty.c:119

stack backtrace:
CPU: 1 PID: 7038 Comm: syz-executor206 Not tainted 4.14.111 #1

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:

__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x19c lib/dump_stack.c:53
print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1258
check_prev_add kernel/locking/lockdep.c:1901 [inline]
check_prevs_add kernel/locking/lockdep.c:2018 [inline]
validate_chain kernel/locking/lockdep.c:2460 [inline]
__lock_acquire+0x2c89/0x45e0 kernel/locking/lockdep.c:3487
lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
console_trylock_spinning kernel/printk/printk.c:1673 [inline]
vprintk_emit kernel/printk/printk.c:1916 [inline]
vprintk_emit+0x32e/0x600 kernel/printk/printk.c:1882
vprintk_default+0x28/0x30 kernel/printk/printk.c:1957
vprintk_func+0x5d/0x159 kernel/printk/printk_safe.c:401
printk+0x9e/0xbc kernel/printk/printk.c:1990
fail_dump lib/fault-inject.c:44 [inline]
should_fail.cold+0xe4/0x159 lib/fault-inject.c:149
should_failslab+0xdb/0x130 mm/failslab.c:32
slab_pre_alloc_hook mm/slab.h:421 [inline]
slab_alloc mm/slab.c:3376 [inline]
__do_kmalloc mm/slab.c:3718 [inline]
__kmalloc+0x71/0x7a0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
tty_buffer_alloc drivers/tty/tty_buffer.c:169 [inline]
__tty_buffer_request_room+0x1a4/0x500 drivers/tty/tty_buffer.c:267
tty_insert_flip_string_fixed_flag+0x8a/0x1c0 drivers/tty/tty_buffer.c:312
tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
pty_write+0x113/0x1d0 drivers/tty/pty.c:121
tty_put_char+0x113/0x140 drivers/tty/tty_io.c:2878
__process_echoes+0x2ce/0x8a0 drivers/tty/n_tty.c:708
flush_echoes drivers/tty/n_tty.c:829 [inline]
__receive_buf drivers/tty/n_tty.c:1648 [inline]
n_tty_receive_buf_common+0x998/0x2410 drivers/tty/n_tty.c:1742
n_tty_receive_buf+0x31/0x3b drivers/tty/n_tty.c:1771
tiocsti drivers/tty/tty_io.c:2184 [inline]
tty_ioctl+0xe0e/0x1340 drivers/tty/tty_io.c:2570
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7b9/0x1070 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x440679
RSP: 002b:00007ffdc3243ad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010