audit: type=1400 audit(1663333805.903:8): avc: denied { kernel } for pid=6433 comm="syz-executor.0" 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.0/6434 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800d0e7020 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ctx->lock){....}-{2:2}:
_raw_spin_lock+0x2a/0x40
__perf_event_task_sched_out+0x53b/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
irqentry_exit_to_user_mode+0x5/0x30
asm_sysvec_apic_timer_interrupt+0x16/0x20
-> #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
vprintk_emit+0x1bd/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
kauditd_hold_skb.cold+0x3f/0x4e
kauditd_send_queue+0x233/0x290
kauditd_thread+0x5da/0x9a0
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
-> #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
group_sched_out.part.0+0x2c7/0x460
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
irqentry_exit_to_user_mode+0x5/0x30
asm_sysvec_apic_timer_interrupt+0x16/0x20
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-executor.0/6434:
#0: ffff88806cf37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff88800d0e7020 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 1 PID: 6434 Comm: syz-executor.0 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:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 3b b7 ef ff e8 36 b7 ef ff 65 8b 1d ab 15 ac 7e 31 ff 89 de e8 d6 b3 ef ff 85 db 0f 84 8a 00 00 00 e8 19 b7 ef ff <0f> 0b e9 a5 fe ff ff e8 0d b7 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0000:ffff88800e5ffc68 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801dd31ac0 RSI: ffffffff81566027 RDI: 0000000000000005
RBP: ffff88802f1d0000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: ffff88800d0e7000
R13: ffff88806cf3d100 R14: ffffffff8547c660 R15: 0000000000000002
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
irqentry_exit_to_user_mode+0x5/0x30
asm_sysvec_apic_timer_interrupt+0x16/0x20
RIP: 0033:0x7f45589e5b19
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:00007f4555f5b188 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 00007f4558af8f60 RCX: 00007f45589e5b19
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f4558a3ff6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeea99c95f R14: 00007f4555f5b300 R15: 0000000000022000
WARNING: CPU: 1 PID: 6434 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 1 PID: 6434 Comm: syz-executor.0 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:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 3b b7 ef ff e8 36 b7 ef ff 65 8b 1d ab 15 ac 7e 31 ff 89 de e8 d6 b3 ef ff 85 db 0f 84 8a 00 00 00 e8 19 b7 ef ff <0f> 0b e9 a5 fe ff ff e8 0d b7 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0000:ffff88800e5ffc68 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801dd31ac0 RSI: ffffffff81566027 RDI: 0000000000000005
RBP: ffff88802f1d0000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: ffff88800d0e7000
R13: ffff88806cf3d100 R14: ffffffff8547c660 R15: 0000000000000002
FS: 00007f4555f5b700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f786277c4a1 CR3: 000000001dce6000 CR4: 0000000000350ee0
Call Trace:
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
irqentry_exit_to_user_mode+0x5/0x30
asm_sysvec_apic_timer_interrupt+0x16/0x20
RIP: 0033:0x7f45589e5b19
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:00007f4555f5b188 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 00007f4558af8f60 RCX: 00007f45589e5b19
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f4558a3ff6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeea99c95f R14: 00007f4555f5b300 R15: 0000000000022000
irq event stamp: 732
hardirqs last enabled at (731): [] exit_to_user_mode_prepare+0x109/0x1a0
hardirqs last disabled at (732): [] __schedule+0x1225/0x2470
softirqs last enabled at (490): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (473): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
=======================================================
WARNING: The mand mount option has been deprecated and
and is ignored by this kernel. Remove the mand
option from the mount to silence this warning.
=======================================================
loop5: detected capacity change from 0 to 40
loop0: detected capacity change from 0 to 128
loop0: detected capacity change from 0 to 128
loop5: detected capacity change from 0 to 40
loop5: detected capacity change from 0 to 40
loop1: detected capacity change from 0 to 40
loop5: detected capacity change from 0 to 40
audit: type=1326 audit(1663333808.970:9): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6689 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ff78f8e7b19 code=0x0
loop1: detected capacity change from 0 to 40
loop1: detected capacity change from 0 to 40
audit: type=1326 audit(1663333809.168:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6720 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ff78f8e7b19 code=0x0
audit: type=1326 audit(1663333809.285:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6741 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ff78f8e7b19 code=0x0
audit: type=1326 audit(1663333809.435:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6763 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ff78f8e7b19 code=0x0
hrtimer: interrupt took 16781 ns
Bluetooth: hci0: command 0x041c tx timeout
audit: type=1400 audit(1663333811.532:13): avc: denied { write } for pid=6854 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
capability: warning: `syz-executor.1' uses 32-bit capabilities (legacy support in use)
random: crng reseeded on system resumption
random: crng reseeded on system resumption
Bluetooth: hci0: command 0x041c tx timeout
random: crng reseeded on system resumption
random: crng reseeded on system resumption
audit: type=1326 audit(1663333813.551:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6944 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fbb3da8fb19 code=0x0
syz-executor.2 calls setitimer() with new_value NULL pointer. Misfeature support will be removed
audit: type=1326 audit(1663333814.383:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6944 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fbb3da8fb19 code=0x0
audit: type=1326 audit(1663333814.513:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=7002 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fbb3da8fb19 code=0x0
Bluetooth: hci0: command 0x041c tx timeout
tmpfs: Bad value for 'size'
tmpfs: Bad value for 'size'
audit: type=1326 audit(1663333815.459:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=7035 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fbb3da8fb19 code=0x0
tmpfs: Bad value for 'size'