INFO: rcu detected stall in input_inject_event

[syzbot]

Hello,

syzkaller hit the following crash on
ead68f216110170ec729e2c4dec0aad6d38259d7
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.

Unfortunately, I don't have any reproducer for this bug yet.


1 lock held by syz-executor3/24834:
#0: (&mm->mmap_sem){++++}, at: [<00000000bb12c38a>]
vm_mmap_pgoff+0x198/0x280 mm/util.c:331

=============================================

INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
1-...!: (1 ticks this GP) idle=69a/140000000000001/0 softirq=179029/179029
fqs=0
(detected by 0, t=137178 jiffies, g=80069, c=80068, q=111)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 24838 Comm: syz-executor1 Not tainted 4.15.0-rc4+ #233
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:inb arch/x86/include/asm/io.h:348 [inline]
RIP: 0010:io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:434
RSP: 0018:ffff8801db506ff8 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff87deaf38
RBP: ffff8801db507008 R08: 1ffff1003b6a0d57 R09: 000000000000000c
R10: ffff8801db506f78 R11: 0000000000000040 R12: ffffffff87deaf00
R13: 0000000000000020 R14: fffffbfff0fbd625 R15: fffffbfff0fbd5e9
FS: 00007f1872219700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000130 CR3: 00000001c4847004 CR4: 00000000001626e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
serial_in drivers/tty/serial/8250/8250.h:111 [inline]
wait_for_xmitr+0x93/0x1e0 drivers/tty/serial/8250/8250_port.c:2033
serial8250_console_putchar+0x1f/0x60
drivers/tty/serial/8250/8250_port.c:3170
uart_console_write+0xac/0xe0 drivers/tty/serial/serial_core.c:1858
serial8250_console_write+0x64f/0xa40
drivers/tty/serial/8250/8250_port.c:3236
univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590
call_console_drivers kernel/printk/printk.c:1574 [inline]
console_unlock+0x788/0xd80 kernel/printk/printk.c:2233
vprintk_emit+0x4ad/0x590 kernel/printk/printk.c:1757
vprintk_default+0x28/0x30 kernel/printk/printk.c:1796
vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379
printk+0xaa/0xca kernel/printk/printk.c:1829
print_cpu_stall_info_begin kernel/rcu/tree_plugin.h:1657 [inline]
print_cpu_stall kernel/rcu/tree.c:1594 [inline]
check_cpu_stall.isra.61+0x845/0x15b0 kernel/rcu/tree.c:1676
__rcu_pending kernel/rcu/tree.c:3440 [inline]
rcu_pending kernel/rcu/tree.c:3502 [inline]
rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
update_process_times+0x30/0x60 kernel/time/timer.c:1630
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1166
__run_hrtimer kernel/time/hrtimer.c:1211 [inline]
__hrtimer_run_queues+0x358/0xe20 kernel/time/hrtimer.c:1275
hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1309
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:904
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777
[inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160
[inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x5e/0xba
kernel/locking/spinlock.c:184
RSP: 0018:ffff8801ce887590 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff11
RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 0000000000000006
RDX: 1ffffffff0bd9045 RSI: 1ffff1003acee1db RDI: 0000000000000282
RBP: ffff8801ce8875a0 R08: 1ffff10039d10e80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d403d588
R13: ffff8801d30bd608 R14: ffff8801d403d380 R15: ffff8801ce887638
spin_unlock_irqrestore include/linux/spinlock.h:365 [inline]
input_inject_event+0x22c/0x349 drivers/input/input.c:469
evdev_write+0x34a/0x4b0 drivers/input/evdev.c:559
__vfs_write+0xef/0x970 fs/read_write.c:480
__kernel_write+0xf8/0x350 fs/read_write.c:501
write_pipe_buf+0x175/0x220 fs/splice.c:797
splice_from_pipe_feed fs/splice.c:502 [inline]
__splice_from_pipe+0x328/0x730 fs/splice.c:626
splice_from_pipe+0x1e9/0x330 fs/splice.c:661
default_file_splice_write+0x40/0x90 fs/splice.c:809
do_splice_from fs/splice.c:851 [inline]
direct_splice_actor+0x125/0x180 fs/splice.c:1018
splice_direct_to_actor+0x2c1/0x820 fs/splice.c:973
do_splice_direct+0x29b/0x3c0 fs/splice.c:1061
do_sendfile+0x5c9/0xe80 fs/read_write.c:1413
SYSC_sendfile64 fs/read_write.c:1468 [inline]
SyS_sendfile64+0xbd/0x160 fs/read_write.c:1460
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007f1872218c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000020000000 RSI: 0000000000000013 RDI: 0000000000000014
RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000072439a6b R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007f18722196d4 R15: 0000000000000000
Code: 24 d1 00 00 00 49 8d 7c 24 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa
48 c1 ea 03 d3 e3 80 3c 02 00 75 17 41 03 5c 24 38 89 da ec <5b> 0f b6 c0
41 5c 5d c3 e8 b8 34 18 ff eb c2 e8 11 35 18 ff eb
rcu_sched kthread starved for 137178 jiffies! g80069 c80068 f0x0
RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1
rcu_sched I23456 8 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_timeout+0x118/0x230 kernel/time/timer.c:1795
rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2314
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
1-...!: (1 ticks this GP) idle=69a/140000000000001/0 softirq=179029/179029
fqs=0
(t=137178 jiffies g=80069 c=80068 q=120)
rcu_sched kthread starved for 137178 jiffies! g80069 c80068 f0x2
RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_sched R running task 23456 8 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_timeout+0x118/0x230 kernel/time/timer.c:1795
rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2314
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
NMI backtrace for cpu 1
CPU: 1 PID: 24838 Comm: syz-executor1 Not tainted 4.15.0-rc4+ #233
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x122/0x180 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
rcu_dump_cpu_stacks+0x186/0x1d9 kernel/rcu/tree.c:1459
print_cpu_stall kernel/rcu/tree.c:1608 [inline]
check_cpu_stall.isra.61+0xbb8/0x15b0 kernel/rcu/tree.c:1676
__rcu_pending kernel/rcu/tree.c:3440 [inline]
rcu_pending kernel/rcu/tree.c:3502 [inline]
rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
update_process_times+0x30/0x60 kernel/time/timer.c:1630
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1166
__run_hrtimer kernel/time/hrtimer.c:1211 [inline]
__hrtimer_run_queues+0x358/0xe20 kernel/time/hrtimer.c:1275
hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1309
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:904
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777
[inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160
[inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x5e/0xba
kernel/locking/spinlock.c:184
RSP: 0018:ffff8801ce887590 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff11
RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 0000000000000006
RDX: 1ffffffff0bd9045 RSI: 1ffff1003acee1db RDI: 0000000000000282
RBP: ffff8801ce8875a0 R08: 1ffff10039d10e80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d403d588
R13: ffff8801d30bd608 R14: ffff8801d403d380 R15: ffff8801ce887638
spin_unlock_irqrestore include/linux/spinlock.h:365 [inline]
input_inject_event+0x22c/0x349 drivers/input/input.c:469
evdev_write+0x34a/0x4b0 drivers/input/evdev.c:559
__vfs_write+0xef/0x970 fs/read_write.c:480
__kernel_write+0xf8/0x350 fs/read_write.c:501
write_pipe_buf+0x175/0x220 fs/splice.c:797
splice_from_pipe_feed fs/splice.c:502 [inline]
__splice_from_pipe+0x328/0x730 fs/splice.c:626
splice_from_pipe+0x1e9/0x330 fs/splice.c:661
default_file_splice_write+0x40/0x90 fs/splice.c:809
do_splice_from fs/splice.c:851 [inline]
direct_splice_actor+0x125/0x180 fs/splice.c:1018
splice_direct_to_actor+0x2c1/0x820 fs/splice.c:973
do_splice_direct+0x29b/0x3c0 fs/splice.c:1061
do_sendfile+0x5c9/0xe80 fs/read_write.c:1413
SYSC_sendfile64 fs/read_write.c:1468 [inline]
SyS_sendfile64+0xbd/0x160 fs/read_write.c:1460
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007f1872218c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000020000000 RSI: 0000000000000013 RDI: 0000000000000014
RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000072439a6b R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007f18722196d4 R15: 0000000000000000
device lo entered promiscuous mode
audit: type=1400 audit(1513966700.561:3992): avc: denied { map } for
pid=24862 comm="sh" path="/bin/dash" dev="sda1" ino=1473
scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
task PC stack pid father
init S16000 1 0 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_hrtimeout_range_clock+0x206/0x460 kernel/time/hrtimer.c:1706
schedule_hrtimeout_range+0x2a/0x40 kernel/time/hrtimer.c:1751
poll_schedule_timeout+0x10f/0x1f0 fs/select.c:243
do_select+0x11dd/0x1700 fs/select.c:580
core_sys_select+0x480/0x960 fs/select.c:654
SYSC_select fs/select.c:695 [inline]
SyS_select+0x194/0x230 fs/select.c:677
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x7fe752d3edd3
RSP: 002b:00007ffeb4d8bcc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
RAX: ffffffffffffffda RBX: 00007ffeb4d8be70 RCX: 00007fe752d3edd3
RDX: 0000000000000000 RSI: 00007ffeb4d8c020 RDI: 000000000000000b
RBP: 00007ffeb4d8c020 R08: 00007ffeb4d8c0a0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00007ffeb4d8c400 R14: 0000000000000000 R15: 0000000000000000
kthreadd S21792 2 0 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
kthreadd+0x6d3/0x830 kernel/kthread.c:555
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
kworker/0:0H I21480 4 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
worker_thread+0x492/0x1990 kernel/workqueue.c:2267
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
mm_percpu_wq I26400 6 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rescuer_thread+0xf4b/0x1460 kernel/workqueue.c:2405
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
ksoftirqd/0 S16848 7 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
rcu_sched I23456 8 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_timeout+0x118/0x230 kernel/time/timer.c:1795
rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2314
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
rcu_bh I25376 9 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rcu_gp_kthread+0x123a/0x1930 kernel/rcu/tree.c:2282
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
migration/0 S25368 10 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
watchdog/0 S27536 11 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
cpuhp/0 S24352 12 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
cpuhp/1 S24752 13 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
watchdog/1 S27536 14 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
migration/1 S25368 15 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
ksoftirqd/1 S14560 16 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
smpboot_thread_fn+0x66b/0x7c0 kernel/smpboot.c:160
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
kworker/1:0H I21480 18 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
worker_thread+0x492/0x1990 kernel/workqueue.c:2267
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
kdevtmpfs S24832 19 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
devtmpfsd+0x41a/0x4c0 drivers/base/devtmpfs.c:408
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
netns I27688 20 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rescuer_thread+0xf4b/0x1460 kernel/workqueue.c:2405
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
kauditd S25128 26 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
kauditd_thread+0x4f1/0x970 kernel/audit.c:849
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
khungtaskd S26480 675 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_timeout+0x118/0x230 kernel/time/timer.c:1795
schedule_timeout_interruptible+0x75/0x90 kernel/time/timer.c:1815
watchdog+0x14b/0xd60 kernel/hung_task.c:253
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
oom_reaper S27808 676 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
oom_reaper+0x2a9/0x440 mm/oom_kill.c:623
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
writeback I14576 677 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rescuer_thread+0xf4b/0x1460 kernel/workqueue.c:2405
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
kcompactd0 S27376 679 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
kcompactd+0x4f1/0x790 mm/compaction.c:2064
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
ksmd S27456 680 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
ksm_scan_thread+0x346/0x570 mm/ksm.c:2352
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
khugepaged S22864 681 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_timeout+0x118/0x230 kernel/time/timer.c:1795
khugepaged_wait_work+0x5d0/0x7c0 mm/khugepaged.c:1837
khugepaged+0x5c7/0x1400 mm/khugepaged.c:1856
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
crypto I27688 682 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rescuer_thread+0xf4b/0x1460 kernel/workqueue.c:2405
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
kintegrityd I27688 683 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rescuer_thread+0xf4b/0x1460 kernel/workqueue.c:2405
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
kblockd I27688 685 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rescuer_thread+0xf4b/0x1460 kernel/workqueue.c:2405
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515
ata_sff I25552 763 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
rescuer_thread+0xf4b/0x1460 kernel/workqueue.c:2405


---
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[Dmitry Vyukov]

old bug bankruptcy

#syz invalid

On Fri, Dec 22, 2017 at 10:37 PM, syzbot
<bot+7de6d85558712f77e5...@syzkaller.appspotmail.com>
wrote:

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