inconsistent lock state in sco_conn_del
5 views
Skip to first unread message
syzbot
Aug 11, 2020, 1:07:15 PM8/11/20
to da...@davemloft.net, johan....@gmail.com, ku...@kernel.org, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, mar...@holtmann.org, net...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: f80535b9 Add linux-next specific files for 20200810
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=152ffd8a900000
kernel config: https://syzkaller.appspot.com/x/.config?x=2055bd0d83d5ee16
dashboard link: https://syzkaller.appspot.com/bug?extid=65684128cd7c35bc66a1
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+656841...@syzkaller.appspotmail.com
================================
WARNING: inconsistent lock state
5.8.0-next-20200810-syzkaller #0 Not tainted
--------------------------------
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
syz-executor.5/11793 [HC0[0]:SC0[0]:HE1:SE1] takes:
ffff8880554ec0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff8880554ec0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
{IN-SOFTIRQ-W} state was registered at:
lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_sock_timeout+0x24/0x140 net/bluetooth/sco.c:83
call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
__do_softirq+0x2de/0xa24 kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1090
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
arch_local_irq_enable arch/x86/include/asm/paravirt.h:780 [inline]
__local_bh_enable_ip+0x101/0x190 kernel/softirq.c:200
spin_unlock_bh include/linux/spinlock.h:399 [inline]
batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:470
batadv_nc_worker+0x868/0xe50 net/batman-adv/network-coding.c:721
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
irq event stamp: 33895
hardirqs last enabled at (33895): [<ffffffff81b4172d>] kfree+0x1cd/0x2c0 mm/slab.c:3757
hardirqs last disabled at (33894): [<ffffffff81b415cf>] kfree+0x6f/0x2c0 mm/slab.c:3746
softirqs last enabled at (30344): [<ffffffff88000f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
softirqs last disabled at (30333): [<ffffffff88000f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
<Interrupt>
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
*** DEADLOCK ***
3 locks held by syz-executor.5/11793:
#0: ffff88805b990f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xf5/0x1080 net/bluetooth/hci_core.c:1720
#1: ffff88805b990078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x253/0x1080 net/bluetooth/hci_core.c:1757
#2: ffffffff8a9a5c28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1435 [inline]
#2: ffffffff8a9a5c28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc7/0x220 net/bluetooth/hci_conn.c:1557
stack backtrace:
CPU: 0 PID: 11793 Comm: syz-executor.5 Not tainted 5.8.0-next-20200810-syzkaller #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+0x18f/0x20d lib/dump_stack.c:118
print_usage_bug kernel/locking/lockdep.c:4020 [inline]
valid_state kernel/locking/lockdep.c:3361 [inline]
mark_lock_irq kernel/locking/lockdep.c:3560 [inline]
mark_lock.cold+0x7a/0x7f kernel/locking/lockdep.c:4006
mark_usage kernel/locking/lockdep.c:3923 [inline]
__lock_acquire+0x8cd/0x5640 kernel/locking/lockdep.c:4380
lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
sco_disconn_cfm net/bluetooth/sco.c:1178 [inline]
sco_disconn_cfm+0x62/0x80 net/bluetooth/sco.c:1171
hci_disconn_cfm include/net/bluetooth/hci_core.h:1438 [inline]
hci_conn_hash_flush+0x114/0x220 net/bluetooth/hci_conn.c:1557
hci_dev_do_close+0x5c6/0x1080 net/bluetooth/hci_core.c:1770
hci_unregister_dev+0x1bd/0xe30 net/bluetooth/hci_core.c:3790
vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340
__fput+0x285/0x920 fs/file_table.c:281
task_work_run+0xdd/0x190 kernel/task_work.c:135
exit_task_work include/linux/task_work.h:25 [inline]
do_exit+0xb7d/0x29f0 kernel/exit.c:806
do_group_exit+0x125/0x310 kernel/exit.c:903
get_signal+0x40b/0x1ee0 kernel/signal.c:2743
arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:135 [inline]
exit_to_user_mode_prepare+0x15d/0x1c0 kernel/entry/common.c:166
syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:241
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ce69
Code: Bad RIP value.
RSP: 002b:00007fd132defcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000118bfc8 RCX: 000000000045ce69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118bfc8
RBP: 000000000118bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfcc
R13: 00007ffd9693ba5f R14: 00007fd132df09c0 R15: 000000000118bfcc
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: f80535b9 Add linux-next specific files for 20200810
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=152ffd8a900000
kernel config: https://syzkaller.appspot.com/x/.config?x=2055bd0d83d5ee16
dashboard link: https://syzkaller.appspot.com/bug?extid=65684128cd7c35bc66a1
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+656841...@syzkaller.appspotmail.com
================================
WARNING: inconsistent lock state
5.8.0-next-20200810-syzkaller #0 Not tainted
--------------------------------
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
syz-executor.5/11793 [HC0[0]:SC0[0]:HE1:SE1] takes:
ffff8880554ec0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff8880554ec0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
{IN-SOFTIRQ-W} state was registered at:
lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_sock_timeout+0x24/0x140 net/bluetooth/sco.c:83
call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
__do_softirq+0x2de/0xa24 kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1090
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
arch_local_irq_enable arch/x86/include/asm/paravirt.h:780 [inline]
__local_bh_enable_ip+0x101/0x190 kernel/softirq.c:200
spin_unlock_bh include/linux/spinlock.h:399 [inline]
batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:470
batadv_nc_worker+0x868/0xe50 net/batman-adv/network-coding.c:721
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
irq event stamp: 33895
hardirqs last enabled at (33895): [<ffffffff81b4172d>] kfree+0x1cd/0x2c0 mm/slab.c:3757
hardirqs last disabled at (33894): [<ffffffff81b415cf>] kfree+0x6f/0x2c0 mm/slab.c:3746
softirqs last enabled at (30344): [<ffffffff88000f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
softirqs last disabled at (30333): [<ffffffff88000f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
<Interrupt>
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
*** DEADLOCK ***
3 locks held by syz-executor.5/11793:
#0: ffff88805b990f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xf5/0x1080 net/bluetooth/hci_core.c:1720
#1: ffff88805b990078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x253/0x1080 net/bluetooth/hci_core.c:1757
#2: ffffffff8a9a5c28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1435 [inline]
#2: ffffffff8a9a5c28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc7/0x220 net/bluetooth/hci_conn.c:1557
stack backtrace:
CPU: 0 PID: 11793 Comm: syz-executor.5 Not tainted 5.8.0-next-20200810-syzkaller #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+0x18f/0x20d lib/dump_stack.c:118
print_usage_bug kernel/locking/lockdep.c:4020 [inline]
valid_state kernel/locking/lockdep.c:3361 [inline]
mark_lock_irq kernel/locking/lockdep.c:3560 [inline]
mark_lock.cold+0x7a/0x7f kernel/locking/lockdep.c:4006
mark_usage kernel/locking/lockdep.c:3923 [inline]
__lock_acquire+0x8cd/0x5640 kernel/locking/lockdep.c:4380
lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
sco_disconn_cfm net/bluetooth/sco.c:1178 [inline]
sco_disconn_cfm+0x62/0x80 net/bluetooth/sco.c:1171
hci_disconn_cfm include/net/bluetooth/hci_core.h:1438 [inline]
hci_conn_hash_flush+0x114/0x220 net/bluetooth/hci_conn.c:1557
hci_dev_do_close+0x5c6/0x1080 net/bluetooth/hci_core.c:1770
hci_unregister_dev+0x1bd/0xe30 net/bluetooth/hci_core.c:3790
vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340
__fput+0x285/0x920 fs/file_table.c:281
task_work_run+0xdd/0x190 kernel/task_work.c:135
exit_task_work include/linux/task_work.h:25 [inline]
do_exit+0xb7d/0x29f0 kernel/exit.c:806
do_group_exit+0x125/0x310 kernel/exit.c:903
get_signal+0x40b/0x1ee0 kernel/signal.c:2743
arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:135 [inline]
exit_to_user_mode_prepare+0x15d/0x1c0 kernel/entry/common.c:166
syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:241
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ce69
Code: Bad RIP value.
RSP: 002b:00007fd132defcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000118bfc8 RCX: 000000000045ce69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118bfc8
RBP: 000000000118bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfcc
R13: 00007ffd9693ba5f R14: 00007fd132df09c0 R15: 000000000118bfcc
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Sep 11, 2020, 9:35:16 PM9/11/20
to da...@davemloft.net, johan....@gmail.com, ku...@kernel.org, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, mar...@holtmann.org, net...@vger.kernel.org, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: e8878ab8 Merge tag 'spi-fix-v5.9-rc4' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12130759900000
kernel config: https://syzkaller.appspot.com/x/.config?x=c61610091f4ca8c4
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c3a853900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+656841...@syzkaller.appspotmail.com
================================
WARNING: inconsistent lock state
5.9.0-rc4-syzkaller #0 Not tainted
ffff8880a75c50a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff8880a75c50a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
unwind_next_frame+0x139a/0x1f90 arch/x86/kernel/unwind_orc.c:607
arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
slab_post_alloc_hook mm/slab.h:518 [inline]
slab_alloc mm/slab.c:3312 [inline]
kmem_cache_alloc+0x13a/0x3a0 mm/slab.c:3482
__d_alloc+0x2a/0x950 fs/dcache.c:1709
d_alloc+0x4a/0x230 fs/dcache.c:1788
d_alloc_parallel+0xe9/0x18e0 fs/dcache.c:2540
lookup_open.isra.0+0x9ac/0x1350 fs/namei.c:3030
open_last_lookups fs/namei.c:3177 [inline]
path_openat+0x96d/0x2730 fs/namei.c:3365
do_filp_open+0x17e/0x3c0 fs/namei.c:3395
do_sys_openat2+0x16d/0x420 fs/open.c:1168
do_sys_open fs/open.c:1184 [inline]
__do_sys_open fs/open.c:1192 [inline]
__se_sys_open fs/open.c:1188 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1188
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
irq event stamp: 853
hardirqs last enabled at (853): [<ffffffff87f733af>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last enabled at (853): [<ffffffff87f733af>] _raw_spin_unlock_irq+0x1f/0x80 kernel/locking/spinlock.c:199
hardirqs last disabled at (852): [<ffffffff87f73764>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (852): [<ffffffff87f73764>] _raw_spin_lock_irq+0xa4/0xd0 kernel/locking/spinlock.c:167
softirqs last enabled at (0): [<ffffffff8144c929>] copy_process+0x1a99/0x6920 kernel/fork.c:2018
softirqs last disabled at (0): [<0000000000000000>] 0x0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
<Interrupt>
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
*** DEADLOCK ***
3 locks held by syz-executor675/31233:
#0: ffff88809f104f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xf5/0x1080 net/bluetooth/hci_core.c:1720
#1: ffff88809f104078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x253/0x1080 net/bluetooth/hci_core.c:1757
#2: ffffffff8a9188c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1435 [inline]
#2: ffffffff8a9188c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc7/0x220 net/bluetooth/hci_conn.c:1557
stack backtrace:
CPU: 1 PID: 31233 Comm: syz-executor675 Not tainted 5.9.0-rc4-syzkaller #0
lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006
arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:159 [inline]
exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:190
syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:265
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x447279
Code: Bad RIP value.
RSP: 002b:00007fd19f624d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006dcc28 RCX: 0000000000447279
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc28
RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c
R13: 0000000000000004 R14: 0000000000000003 R15: 00007fd19f6256d0
HEAD commit: e8878ab8 Merge tag 'spi-fix-v5.9-rc4' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12130759900000
kernel config: https://syzkaller.appspot.com/x/.config?x=c61610091f4ca8c4
dashboard link: https://syzkaller.appspot.com/bug?extid=65684128cd7c35bc66a1
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121ef0fd900000
compiler: gcc (GCC) 10.1.0-syz 20200507
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c3a853900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+656841...@syzkaller.appspotmail.com
================================
WARNING: inconsistent lock state
--------------------------------
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
syz-executor675/31233 [HC0[0]:SC0[0]:HE1:SE1] takes:
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
ffff8880a75c50a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff8880a75c50a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
{IN-SOFTIRQ-W} state was registered at:
lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_sock_timeout+0x24/0x140 net/bluetooth/sco.c:83
call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
__do_softirq+0x1f7/0xa91 kernel/softirq.c:298
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_sock_timeout+0x24/0x140 net/bluetooth/sco.c:83
call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x235/0x280 kernel/softirq.c:435
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
unwind_next_frame+0x139a/0x1f90 arch/x86/kernel/unwind_orc.c:607
arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
slab_post_alloc_hook mm/slab.h:518 [inline]
slab_alloc mm/slab.c:3312 [inline]
kmem_cache_alloc+0x13a/0x3a0 mm/slab.c:3482
__d_alloc+0x2a/0x950 fs/dcache.c:1709
d_alloc+0x4a/0x230 fs/dcache.c:1788
d_alloc_parallel+0xe9/0x18e0 fs/dcache.c:2540
lookup_open.isra.0+0x9ac/0x1350 fs/namei.c:3030
open_last_lookups fs/namei.c:3177 [inline]
path_openat+0x96d/0x2730 fs/namei.c:3365
do_filp_open+0x17e/0x3c0 fs/namei.c:3395
do_sys_openat2+0x16d/0x420 fs/open.c:1168
do_sys_open fs/open.c:1184 [inline]
__do_sys_open fs/open.c:1192 [inline]
__se_sys_open fs/open.c:1188 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1188
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
irq event stamp: 853
hardirqs last enabled at (853): [<ffffffff87f733af>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last enabled at (853): [<ffffffff87f733af>] _raw_spin_unlock_irq+0x1f/0x80 kernel/locking/spinlock.c:199
hardirqs last disabled at (852): [<ffffffff87f73764>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (852): [<ffffffff87f73764>] _raw_spin_lock_irq+0xa4/0xd0 kernel/locking/spinlock.c:167
softirqs last enabled at (0): [<ffffffff8144c929>] copy_process+0x1a99/0x6920 kernel/fork.c:2018
softirqs last disabled at (0): [<0000000000000000>] 0x0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
<Interrupt>
lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
*** DEADLOCK ***
#0: ffff88809f104f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xf5/0x1080 net/bluetooth/hci_core.c:1720
#1: ffff88809f104078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x253/0x1080 net/bluetooth/hci_core.c:1757
#2: ffffffff8a9188c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1435 [inline]
#2: ffffffff8a9188c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc7/0x220 net/bluetooth/hci_conn.c:1557
stack backtrace:
CPU: 1 PID: 31233 Comm: syz-executor675 Not tainted 5.9.0-rc4-syzkaller #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+0x198/0x1fd lib/dump_stack.c:118
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
print_usage_bug kernel/locking/lockdep.c:4020 [inline]
valid_state kernel/locking/lockdep.c:3361 [inline]
mark_lock_irq kernel/locking/lockdep.c:3560 [inline]
mark_lock.cold+0x7a/0x7f kernel/locking/lockdep.c:4006
mark_usage kernel/locking/lockdep.c:3923 [inline]
__lock_acquire+0x876/0x5570 kernel/locking/lockdep.c:4380
valid_state kernel/locking/lockdep.c:3361 [inline]
mark_lock_irq kernel/locking/lockdep.c:3560 [inline]
mark_lock.cold+0x7a/0x7f kernel/locking/lockdep.c:4006
mark_usage kernel/locking/lockdep.c:3923 [inline]
lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
sco_disconn_cfm net/bluetooth/sco.c:1178 [inline]
sco_disconn_cfm+0x62/0x80 net/bluetooth/sco.c:1171
hci_disconn_cfm include/net/bluetooth/hci_core.h:1438 [inline]
hci_conn_hash_flush+0x114/0x220 net/bluetooth/hci_conn.c:1557
hci_dev_do_close+0x5c6/0x1080 net/bluetooth/hci_core.c:1770
hci_unregister_dev+0x1bd/0xe30 net/bluetooth/hci_core.c:3790
vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340
__fput+0x285/0x920 fs/file_table.c:281
task_work_run+0xdd/0x190 kernel/task_work.c:141
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
sco_disconn_cfm net/bluetooth/sco.c:1178 [inline]
sco_disconn_cfm+0x62/0x80 net/bluetooth/sco.c:1171
hci_disconn_cfm include/net/bluetooth/hci_core.h:1438 [inline]
hci_conn_hash_flush+0x114/0x220 net/bluetooth/hci_conn.c:1557
hci_dev_do_close+0x5c6/0x1080 net/bluetooth/hci_core.c:1770
hci_unregister_dev+0x1bd/0xe30 net/bluetooth/hci_core.c:3790
vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340
__fput+0x285/0x920 fs/file_table.c:281
exit_task_work include/linux/task_work.h:25 [inline]
do_exit+0xb7d/0x29f0 kernel/exit.c:806
do_group_exit+0x125/0x310 kernel/exit.c:903
get_signal+0x428/0x1f00 kernel/signal.c:2757
do_exit+0xb7d/0x29f0 kernel/exit.c:806
do_group_exit+0x125/0x310 kernel/exit.c:903
arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:159 [inline]
exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:190
syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:265
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x447279
Code: Bad RIP value.
RSP: 002b:00007fd19f624d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006dcc28 RCX: 0000000000447279
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc28
RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c
R13: 0000000000000004 R14: 0000000000000003 R15: 00007fd19f6256d0
syzbot
Sep 12, 2020, 8:59:08 AM9/12/20
to cgr...@vger.kernel.org, da...@davemloft.net, han...@cmpxchg.org, johan....@gmail.com, kees...@chromium.org, ken...@fb.com, ku...@kernel.org, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, liz...@huawei.com, lu...@amacapital.net, mar...@holtmann.org, net...@vger.kernel.org, syzkall...@googlegroups.com, t...@kernel.org, w...@chromium.org
syzbot has bisected this issue to:
commit 135b8b37bd91cc82f83e98fca109b80375f5317e
Author: Kenny Yu <ken...@fb.com>
Date: Tue Jun 21 18:04:36 2016 +0000
cgroup: Add pids controller event when fork fails because of pid limit
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12f6d80d900000
start commit: e8878ab8 Merge tag 'spi-fix-v5.9-rc4' of git://git.kernel...
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=11f6d80d900000
console output: https://syzkaller.appspot.com/x/log.txt?x=16f6d80d900000
Fixes: 135b8b37bd91 ("cgroup: Add pids controller event when fork fails because of pid limit")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
commit 135b8b37bd91cc82f83e98fca109b80375f5317e
Author: Kenny Yu <ken...@fb.com>
Date: Tue Jun 21 18:04:36 2016 +0000
cgroup: Add pids controller event when fork fails because of pid limit
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12f6d80d900000
start commit: e8878ab8 Merge tag 'spi-fix-v5.9-rc4' of git://git.kernel...
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=11f6d80d900000
console output: https://syzkaller.appspot.com/x/log.txt?x=16f6d80d900000
kernel config: https://syzkaller.appspot.com/x/.config?x=c61610091f4ca8c4
dashboard link: https://syzkaller.appspot.com/bug?extid=65684128cd7c35bc66a1
dashboard link: https://syzkaller.appspot.com/bug?extid=65684128cd7c35bc66a1
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121ef0fd900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c3a853900000
Reported-by: syzbot+656841...@syzkaller.appspotmail.com
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c3a853900000
Fixes: 135b8b37bd91 ("cgroup: Add pids controller event when fork fails because of pid limit")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
Reply all
Reply to author
Forward
0 new messages