audit: type=1400 audit(1663768613.674:8): avc: denied { kernel } for pid=3879 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
hrtimer: interrupt took 20108 ns
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc6-next-20220921 #1 Not tainted
------------------------------------------------------
syz-executor.7/3944 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800ef09c20 (&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
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #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/0x1930
up+0x75/0xb0
__up_console_sem+0x6e/0x80
console_unlock+0x46a/0x590
vt_ioctl+0x14e3/0x2ca0
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
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.7/3944:
#0: ffff88806cf37d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff88800ef09c20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 1 PID: 3944 Comm: syz-executor.7 Not tainted 6.0.0-rc6-next-20220921 #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 9b b9 ef ff e8 96 b9 ef ff 65 8b 1d 2b 12 ac 7e 31 ff 89 de e8 36 b6 ef ff 85 db 0f 84 8a 00 00 00 e8 79 b9 ef ff <0f> 0b e9 a5 fe ff ff e8 6d b9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0000:ffff88803f347c68 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888016290000 RSI: ffffffff815663a7 RDI: 0000000000000005
RBP: ffff88801afc1158 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800ef09c00
R13: ffff88806cf3d140 R14: ffffffff8547d0e0 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: 0033:0x7fe321624b19
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:00007fe31eb9a188 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 00007fe321737f60 RCX: 00007fe321624b19
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000280
RBP: 00007fe32167ef6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff346c817f R14: 00007fe31eb9a300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3944 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 1 PID: 3944 Comm: syz-executor.7 Not tainted 6.0.0-rc6-next-20220921 #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 9b b9 ef ff e8 96 b9 ef ff 65 8b 1d 2b 12 ac 7e 31 ff 89 de e8 36 b6 ef ff 85 db 0f 84 8a 00 00 00 e8 79 b9 ef ff <0f> 0b e9 a5 fe ff ff e8 6d b9 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0000:ffff88803f347c68 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888016290000 RSI: ffffffff815663a7 RDI: 0000000000000005
RBP: ffff88801afc1158 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800ef09c00
R13: ffff88806cf3d140 R14: ffffffff8547d0e0 R15: 0000000000000002
FS: 00007fe31eb9a700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe321738018 CR3: 000000004083a000 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: 0033:0x7fe321624b19
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:00007fe31eb9a188 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 00007fe321737f60 RCX: 00007fe321624b19
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000280
RBP: 00007fe32167ef6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff346c817f R14: 00007fe31eb9a300 R15: 0000000000022000
irq event stamp: 512
hardirqs last enabled at (511): [] asm_sysvec_apic_timer_interrupt+0x16/0x20
hardirqs last disabled at (512): [] __schedule+0x1225/0x2470
softirqs last enabled at (506): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (449): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
audit: type=1400 audit(1663768614.780:9): avc: denied { write } for pid=3943 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
cgroup: Unknown subsys name 'dont_measure'
cgroup: Unknown subsys name 'dont_measure'
cgroup: Unknown subsys name 'dont_measure'
cgroup: Unknown subsys name 'dont_measure'
cgroup: Unknown subsys name 'dont_measure'
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read CD msf
sr 1:0:0:0: [sr0] tag#0 CDB[00]: b9 20 88 8e 8c 6f 16 ee e0 ed 40 13 e6 8f d6 79
sr 1:0:0:0: [sr0] tag#0 CDB[10]: 7a
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read CD msf
sr 1:0:0:0: [sr0] tag#0 CDB[00]: b9 20 88 8e 8c 6f 16 ee e0 ed 40 13 e6 8f d6 79
sr 1:0:0:0: [sr0] tag#0 CDB[10]: 7a
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read CD msf
sr 1:0:0:0: [sr0] tag#0 CDB[00]: b9 20 88 8e 8c 6f 16 ee e0 ed 40 13 e6 8f d6 79
sr 1:0:0:0: [sr0] tag#0 CDB[10]: 7a
journal_path: not usable as path
EXT4-fs: error: could not find journal device path
journal_path: not usable as path
EXT4-fs: error: could not find journal device path
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 CDB: Read CD msf
sr 1:0:0:0: [sr0] tag#0 CDB[00]: b9 20 88 8e 8c 6f 16 ee e0 ed 40 13 e6 8f d6 79
sr 1:0:0:0: [sr0] tag#0 CDB[10]: 7a
journal_path: not usable as path
EXT4-fs: error: could not find journal device path
journal_path: not usable as path
EXT4-fs: error: could not find journal device path
journal_path: not usable as path
EXT4-fs: error: could not find journal device path
loop7: detected capacity change from 0 to 256
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop7: detected capacity change from 0 to 256
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop7: detected capacity change from 0 to 256
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop7: detected capacity change from 0 to 256
FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop7: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 40
loop4: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 40
loop4: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 40
loop4: detected capacity change from 0 to 40
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
random: crng reseeded on system resumption
random: crng reseeded on system resumption
Process accounting resumed
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption