WARNING: CPU: 0 PID: 22277 at kernel/events/core.c:331 event_function_local.constprop.113+0x520/0x5c0 kernel/events/core.c:331
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 22277 Comm: syz-executor1 Not tainted 4.17.0-rc7+ #38
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+0x1b9/0x294 lib/dump_stack.c:113
panic+0x22f/0x4de kernel/panic.c:184
__warn.cold.8+0x163/0x1b3 kernel/panic.c:536
report_bug+0x252/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:event_function_local.constprop.113+0x520/0x5c0 kernel/events/core.c:331
RSP: 0018:ffff8801dae07cf8 EFLAGS: 00010006
RAX: ffff8801af14c3c0 RBX: ffff8801d6f12a40 RCX: ffffffff81909b3a
RDX: 0000000000010000 RSI: ffffffff81909d30 RDI: 0000000000000005
RBP: ffff8801dae07d98 R08: ffff8801af14c3c0 R09: ffffed003ade2549
R10: ffffed003ade2549 R11: ffff8801d6f12a4b R12: 1ffff1003b5c0fa2
R13: ffff8801dae31600 R14: ffff8801ad034700 R15: ffff8801accd6bc0
perf_event_disable_local kernel/events/core.c:2180 [inline]
perf_pending_event+0x242/0x2a0 kernel/events/core.c:5809
irq_work_run_list+0x1b4/0x270 kernel/irq_work.c:155
irq_work_run+0x1d/0x50 kernel/irq_work.c:170
smp_irq_work_interrupt+0x10a/0x650 arch/x86/kernel/irq_work.c:21
irq_work_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline]
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:192
RSP: 0018:ffff8801bc2efd50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff09
RAX: dffffc0000000000 RBX: ffff8801981b7c48 RCX: 0000000000000000
RDX: 1ffffffff11a31af RSI: 0000000000000001 RDI: ffffffff88d18d78
RBP: ffff8801bc2efd58 R08: ffffed0033036f8a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801981b7c48
R13: ffff8801975a4e80 R14: ffff8801975a4f10 R15: ffff8801975a4f1c
spin_unlock_irq include/linux/spinlock.h:360 [inline]
do_group_exit+0x357/0x430 kernel/exit.c:965
__do_sys_exit_group kernel/exit.c:979 [inline]
__se_sys_exit_group kernel/exit.c:977 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:977
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b29
RSP: 002b:00007fff7741e938 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00000000000001a5 RCX: 0000000000455b29
RDX: 0000000000000006 RSI: 0000000000730e38 RDI: 0000000000000000
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000000000
R10: 00007fff7741e8d0 R11: 0000000000000246 R12: 0000000000000013
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380
======================================================
WARNING: possible circular locking dependency detected
4.17.0-rc7+ #38 Not tainted
------------------------------------------------------
syz-executor1/22277 is trying to acquire lock:
000000004229743b ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
but task is already holding lock:
000000004b9ab502 (&ctx->lock){-...}, at: perf_ctx_lock kernel/events/core.c:157 [inline]
000000004b9ab502 (&ctx->lock){-...}, at: event_function_local.constprop.113+0x2a3/0x5c0 kernel/events/core.c:318
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ctx->lock){-...}:
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
perf_event_context_sched_out kernel/events/core.c:3129 [inline]
__perf_event_task_sched_out+0x12df/0x1a30 kernel/events/core.c:3221
perf_event_task_sched_out include/linux/perf_event.h:1104 [inline]
prepare_task_switch kernel/sched/core.c:2639 [inline]
context_switch kernel/sched/core.c:2824 [inline]
__schedule+0xfed/0x1e30 kernel/sched/core.c:3501
preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3625
_cond_resched+0x1d/0x30 kernel/sched/core.c:4974
__mutex_lock_common kernel/locking/mutex.c:747 [inline]
__mutex_lock+0x142/0x17f0 kernel/locking/mutex.c:893
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
__do_sys_perf_event_open+0x1ff2/0x2fa0 kernel/events/core.c:10766
__se_sys_perf_event_open kernel/events/core.c:10384 [inline]
__x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10384
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #2 (&rq->lock){-.-.}:
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
rq_lock kernel/sched/sched.h:1799 [inline]
task_fork_fair+0x8a/0x660 kernel/sched/fair.c:9912
sched_fork+0x43e/0xb30 kernel/sched/core.c:2382
copy_process.part.38+0x1bf1/0x6e70 kernel/fork.c:1764
copy_process kernel/fork.c:1607 [inline]
_do_fork+0x291/0x12a0 kernel/fork.c:2088
kernel_thread+0x34/0x40 kernel/fork.c:2147
rest_init+0x22/0xe4 init/main.c:408
start_kernel+0x906/0x92d init/main.c:738
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:453
x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:434
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242
-> #1 (&p->pi_lock){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
try_to_wake_up+0xca/0x1190 kernel/sched/core.c:1966
wake_up_process+0x10/0x20 kernel/sched/core.c:2129
__up.isra.1+0x1b8/0x290 kernel/locking/semaphore.c:262
up+0x12f/0x1b0 kernel/locking/semaphore.c:187
__up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:242
console_unlock+0x7d6/0x1100 kernel/printk/printk.c:2417
vprintk_emit+0x6ad/0xdd0 kernel/printk/printk.c:1907
vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379
printk+0x9e/0xba kernel/printk/printk.c:1980
load_umh+0x51/0xbd net/bpfilter/bpfilter_kern.c:95
do_one_initcall+0x127/0x913 init/main.c:884
do_initcall_level init/main.c:952 [inline]
do_initcalls init/main.c:960 [inline]
do_basic_setup init/main.c:978 [inline]
kernel_init_freeable+0x49b/0x58e init/main.c:1135
kernel_init+0x11/0x1b3 init/main.c:1061
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
-> #0 ((console_sem).lock){-.-.}:
lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225
console_trylock+0x15/0xa0 kernel/printk/printk.c:2229
console_trylock_spinning kernel/printk/printk.c:1643 [inline]
vprintk_emit+0x694/0xdd0 kernel/printk/printk.c:1906
vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379
printk+0x9e/0xba kernel/printk/printk.c:1980
__warn.cold.8+0x73/0x1b3 kernel/panic.c:518
report_bug+0x252/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
event_function_local.constprop.113+0x520/0x5c0 kernel/events/core.c:331
perf_event_disable_local kernel/events/core.c:2180 [inline]
perf_pending_event+0x242/0x2a0 kernel/events/core.c:5809
irq_work_run_list+0x1b4/0x270 kernel/irq_work.c:155
irq_work_run+0x1d/0x50 kernel/irq_work.c:170
smp_irq_work_interrupt+0x10a/0x650 arch/x86/kernel/irq_work.c:21
irq_work_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline]
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:192
spin_unlock_irq include/linux/spinlock.h:360 [inline]
do_group_exit+0x357/0x430 kernel/exit.c:965
__do_sys_exit_group kernel/exit.c:979 [inline]
__se_sys_exit_group kernel/exit.c:977 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:977
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rq->lock --> &ctx->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ctx->lock);
lock(&rq->lock);
lock(&ctx->lock);
lock((console_sem).lock);
*** DEADLOCK ***
2 locks held by syz-executor1/22277:
#0: 00000000639c3460 (&cpuctx_lock){-...}, at: perf_ctx_lock kernel/events/core.c:155 [inline]
#0: 00000000639c3460 (&cpuctx_lock){-...}, at: event_function_local.constprop.113+0x282/0x5c0 kernel/events/core.c:318
#1: 000000004b9ab502 (&ctx->lock){-...}, at: perf_ctx_lock kernel/events/core.c:157 [inline]
#1: 000000004b9ab502 (&ctx->lock){-...}, at: event_function_local.constprop.113+0x2a3/0x5c0 kernel/events/core.c:318
stack backtrace:
CPU: 0 PID: 22277 Comm: syz-executor1 Not tainted 4.17.0-rc7+ #38
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+0x1b9/0x294 lib/dump_stack.c:113
print_circular_bug.isra.36.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1223
check_prev_add kernel/locking/lockdep.c:1863 [inline]
check_prevs_add kernel/locking/lockdep.c:1976 [inline]
validate_chain kernel/locking/lockdep.c:2417 [inline]
__lock_acquire+0x343e/0x5140 kernel/locking/lockdep.c:3431
lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225
console_trylock+0x15/0xa0 kernel/printk/printk.c:2229
console_trylock_spinning kernel/printk/printk.c:1643 [inline]
vprintk_emit+0x694/0xdd0 kernel/printk/printk.c:1906
vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379
printk+0x9e/0xba kernel/printk/printk.c:1980
__warn.cold.8+0x73/0x1b3 kernel/panic.c:518
report_bug+0x252/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:event_function_local.constprop.113+0x520/0x5c0 kernel/events/core.c:331
RSP: 0018:ffff8801dae07cf8 EFLAGS: 00010006
RAX: ffff8801af14c3c0 RBX: ffff8801d6f12a40 RCX: ffffffff81909b3a
RDX: 0000000000010000 RSI: ffffffff81909d30 RDI: 0000000000000005
RBP: ffff8801dae07d98 R08: ffff8801af14c3c0 R09: ffffed003ade2549
R10: ffffed003ade2549 R11: ffff8801d6f12a4b R12: 1ffff1003b5c0fa2
R13: ffff8801dae31600 R14: ffff8801ad034700 R15: ffff8801accd6bc0
perf_event_disable_local kernel/events/core.c:2180 [inline]
perf_pending_event+0x242/0x2a0 kernel/events/core.c:5809
irq_work_run_list+0x1b4/0x270 kernel/irq_work.c:155
irq_work_run+0x1d/0x50 kernel/irq_work.c:170
smp_irq_work_interrupt+0x10a/0x650 arch/x86/kernel/irq_work.c:21
irq_work_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline]
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:192
RSP: 0018:ffff8801bc2efd50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff09
RAX: dffffc0000000000 RBX: ffff8801981b7c48 RCX: 0000000000000000
RDX: 1ffffffff11a31af RSI: 0000000000000001 RDI: ffffffff88d18d78
RBP: ffff8801bc2efd58 R08: ffffed0033036f8a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801981b7c48
R13: ffff8801975a4e80 R14: ffff8801975a4f10 R15: ffff8801975a4f1c
spin_unlock_irq include/linux/spinlock.h:360 [inline]
do_group_exit+0x357/0x430 kernel/exit.c:965
__do_sys_exit_group kernel/exit.c:979 [inline]
__se_sys_exit_group kernel/exit.c:977 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:977
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b29
RSP: 002b:00007fff7741e938 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00000000000001a5 RCX: 0000000000455b29
RDX: 0000000000000006 RSI: 0000000000730e38 RDI: 0000000000000000
RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000000000
R10: 00007fff7741e8d0 R11: 0000000000000246 R12: 0000
Lost 1 message(s)!
Shutting down cpus with NMI
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..