audit: type=1400 audit(1663489867.729:8): avc: denied { kernel } for pid=3834 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc5-next-20220916 #1 Not tainted
------------------------------------------------------
syz-executor.3/3835 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88806ce37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x30/0x40
raw_spin_rq_lock_nested+0x1e/0x30
task_fork_fair+0x63/0x4d0
sched_cgroup_fork+0x3d0/0x540
copy_process+0x4183/0x6e20
kernel_clone+0xe7/0x890
user_mode_thread+0xad/0xf0
rest_init+0x24/0x250
arch_call_rest_init+0xf/0x14
start_kernel+0x4c1/0x4e6
secondary_startup_64_no_verify+0xe0/0xeb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
_raw_spin_lock_irqsave+0x39/0x60
try_to_wake_up+0xab/0x1920
up+0x75/0xb0
__up_console_sem+0x6e/0x80
console_unlock+0x46a/0x590
vt_ioctl+0x2822/0x2ca0
tty_ioctl+0x7c4/0x1700
__x64_sys_ioctl+0x19a/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #0 ((console_sem).lock){....}-{2:2}:
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
_raw_spin_lock_irqsave+0x39/0x60
down_trylock+0xe/0x70
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x16b/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
report_bug.cold+0x72/0xab
handle_bug+0x3c/0x70
exc_invalid_op+0x14/0x50
asm_exc_invalid_op+0x16/0x20
perf_iterate_ctx+0x495/0x7d0
perf_iterate_sb+0x699/0xb30
__perf_event_task_sched_out+0x2f6/0x18d0
__schedule+0xedd/0x2470
preempt_schedule_common+0x45/0xc0
__cond_resched+0x17/0x30
__mutex_lock+0xa3/0x14d0
__do_sys_perf_event_open+0x1eec/0x32c0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock((console_sem).lock);
*** DEADLOCK ***
2 locks held by syz-executor.3/3835:
#0: ffff88806ce37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffffffff85406fa0 (rcu_read_lock){....}-{1:2}, at: perf_iterate_sb+0x0/0xb30
stack backtrace:
CPU: 0 PID: 3835 Comm: syz-executor.3 Not tainted 6.0.0-rc5-next-20220916 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack_lvl+0x8b/0xb3
check_noncircular+0x263/0x2e0
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
_raw_spin_lock_irqsave+0x39/0x60
down_trylock+0xe/0x70
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x16b/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
report_bug.cold+0x72/0xab
handle_bug+0x3c/0x70
exc_invalid_op+0x14/0x50
asm_exc_invalid_op+0x16/0x20
RIP: 0010:perf_iterate_ctx+0x495/0x7d0
Code: e8 80 0e f1 ff 65 8b 05 f5 6c ad 7e 31 ff 89 c6 89 44 24 08 e8 1c 0b f1 ff 8b 44 24 08 85 c0 0f 84 17 01 00 00 e8 5b 0e f1 ff <0f> 0b e8 54 0e f1 ff 48 8d bb 90 00 00 00 48 89 f8 48 c1 e8 03 80
RSP: 0018:ffff888041627930 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff888008660000 RCX: 0000000000000000
RDX: ffff88800ffb8000 RSI: ffffffff815508e5 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88800df66d08 R14: 0000000000000000 R15: ffff888041627aa0
perf_iterate_sb+0x699/0xb30
__perf_event_task_sched_out+0x2f6/0x18d0
__schedule+0xedd/0x2470
preempt_schedule_common+0x45/0xc0
__cond_resched+0x17/0x30
__mutex_lock+0xa3/0x14d0
__do_sys_perf_event_open+0x1eec/0x32c0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4b73d74b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4b712ea188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f4b73e87f60 RCX: 00007f4b73d74b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200
RBP: 00007f4b73dcef6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8420c81f R14: 00007f4b712ea300 R15: 0000000000022000
WARNING: CPU: 0 PID: 3835 at kernel/events/core.c:2233 perf_iterate_ctx+0x495/0x7d0
Modules linked in:
CPU: 0 PID: 3835 Comm: syz-executor.3 Not tainted 6.0.0-rc5-next-20220916 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:perf_iterate_ctx+0x495/0x7d0
Code: e8 80 0e f1 ff 65 8b 05 f5 6c ad 7e 31 ff 89 c6 89 44 24 08 e8 1c 0b f1 ff 8b 44 24 08 85 c0 0f 84 17 01 00 00 e8 5b 0e f1 ff <0f> 0b e8 54 0e f1 ff 48 8d bb 90 00 00 00 48 89 f8 48 c1 e8 03 80
RSP: 0018:ffff888041627930 EFLAGS: 00010006
RAX: 0000000040000002 RBX: ffff888008660000 RCX: 0000000000000000
RDX: ffff88800ffb8000 RSI: ffffffff815508e5 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88800df66d08 R14: 0000000000000000 R15: ffff888041627aa0
FS: 00007f4b712ea700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91598386f4 CR3: 0000000010468000 CR4: 0000000000350ef0
Call Trace:
perf_iterate_sb+0x699/0xb30
__perf_event_task_sched_out+0x2f6/0x18d0
__schedule+0xedd/0x2470
preempt_schedule_common+0x45/0xc0
__cond_resched+0x17/0x30
__mutex_lock+0xa3/0x14d0
__do_sys_perf_event_open+0x1eec/0x32c0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4b73d74b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4b712ea188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f4b73e87f60 RCX: 00007f4b73d74b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200
RBP: 00007f4b73dcef6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8420c81f R14: 00007f4b712ea300 R15: 0000000000022000
irq event stamp: 2136
hardirqs last enabled at (2135): [] _raw_spin_unlock_irqrestore+0x28/0x60
hardirqs last disabled at (2136): [] __schedule+0x1225/0x2470
softirqs last enabled at (2132): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (2109): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
audit: type=1400 audit(1663489868.153:9): avc: denied { write } for pid=3853 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
hrtimer: interrupt took 21030 ns