audit: type=1400 audit(1664418962.135:8): avc: denied { kernel } for pid=3965 comm="syz-executor.1" 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-rc7-next-20220928 #1 Not tainted
------------------------------------------------------
syz-executor.1/3966 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800e56cc20 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
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
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
-> #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+0x4c6/0x4eb
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+0x2822/0x2ca0
tty_ioctl+0x785/0x16b0
__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_group_detach+0x99e/0x12f0
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
__orc_find+0x83/0xf0
unwind_next_frame+0x2b4/0x20b0
arch_stack_walk+0x83/0xf0
stack_trace_save+0x8c/0xc0
__create_object+0x389/0xc10
kmem_cache_alloc+0x235/0x3e0
getname_flags.part.0+0x50/0x4f0
getname+0x8e/0xd0
do_sys_openat2+0xf9/0x4c0
__x64_sys_openat+0x13f/0x1f0
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 --> &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.1/3966:
#0: ffff88806cf3d160 (&cpuctx_lock){-...}-{2:2}, at: event_function+0x16f/0x3d0
#1: ffff88800e56cc20 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
stack backtrace:
CPU: 1 PID: 3966 Comm: syz-executor.1 Not tainted 6.0.0-rc7-next-20220928 #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_group_detach+0x99e/0x12f0
Code: 85 d5 f8 ff ff e8 f2 49 ee ff 65 44 8b 25 06 b3 aa 7e 31 ff 44 89 e6 e8 90 46 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 d2 49 ee ff <0f> 0b e9 a9 f8 ff ff e8 c6 49 ee ff 65 8b 1d db b2 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010003 RBX: ffff8880183885c8 RCX: 0000000000000000
RDX: ffff88801b6b0000 RSI: ffffffff8157c2ce RDI: 0000000000000005
RBP: ffff8880183885c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: 0000000000000000
R13: ffff888018388658 R14: ffff88800e56cc00 R15: ffff8880183885c8
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
RIP: 0010:__orc_find+0x83/0xf0
Code: 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 <48> 01 d8 48 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee 49 c1
RSP: 0018:ffff88803cfe7ab0 EFLAGS: 00000246
RAX: fffffffffbc57393 RBX: ffffffff85bc6888 RCX: ffffffff8181dc5f
RDX: 0000000000000000 RSI: ffffffff85eefe24 RDI: ffffffff85bc6878
RBP: ffffffff85bc6878 R08: ffffffff85eefe24 R09: ffffffff85edf9f4
R10: ffffed10079fcf7c R11: 000000000003603d R12: ffffffff85bc689c
R13: ffffffff85bc6878 R14: ffffffff85bc6878 R15: dffffc0000000000
unwind_next_frame+0x2b4/0x20b0
arch_stack_walk+0x83/0xf0
stack_trace_save+0x8c/0xc0
__create_object+0x389/0xc10
kmem_cache_alloc+0x235/0x3e0
getname_flags.part.0+0x50/0x4f0
getname+0x8e/0xd0
do_sys_openat2+0xf9/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa211d40b19
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:00007fa20f2b6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fa211e53f60 RCX: 00007fa211d40b19
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffffffffff9c
RBP: 00007fa211d9af6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe8b87fd3f R14: 00007fa20f2b6300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3966 at kernel/events/core.c:2047 perf_group_detach+0x99e/0x12f0
Modules linked in:
CPU: 1 PID: 3966 Comm: syz-executor.1 Not tainted 6.0.0-rc7-next-20220928 #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_group_detach+0x99e/0x12f0
Code: 85 d5 f8 ff ff e8 f2 49 ee ff 65 44 8b 25 06 b3 aa 7e 31 ff 44 89 e6 e8 90 46 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 d2 49 ee ff <0f> 0b e9 a9 f8 ff ff e8 c6 49 ee ff 65 8b 1d db b2 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010003 RBX: ffff8880183885c8 RCX: 0000000000000000
RDX: ffff88801b6b0000 RSI: ffffffff8157c2ce RDI: 0000000000000005
RBP: ffff8880183885c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: 0000000000000000
R13: ffff888018388658 R14: ffff88800e56cc00 R15: ffff8880183885c8
FS: 00007fa20f2b6700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd05def4b10 CR3: 0000000030ed6000 CR4: 0000000000350ee0
Call Trace:
__perf_remove_from_context+0x71e/0xb20
event_function+0x297/0x3d0
remote_function+0x125/0x1b0
__flush_smp_call_function_queue+0x1df/0x5a0
__sysvec_call_function_single+0x92/0x3a0
sysvec_call_function_single+0x89/0xc0
asm_sysvec_call_function_single+0x16/0x20
RIP: 0010:__orc_find+0x83/0xf0
Code: 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 <48> 01 d8 48 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee 49 c1
RSP: 0018:ffff88803cfe7ab0 EFLAGS: 00000246
RAX: fffffffffbc57393 RBX: ffffffff85bc6888 RCX: ffffffff8181dc5f
RDX: 0000000000000000 RSI: ffffffff85eefe24 RDI: ffffffff85bc6878
RBP: ffffffff85bc6878 R08: ffffffff85eefe24 R09: ffffffff85edf9f4
R10: ffffed10079fcf7c R11: 000000000003603d R12: ffffffff85bc689c
R13: ffffffff85bc6878 R14: ffffffff85bc6878 R15: dffffc0000000000
unwind_next_frame+0x2b4/0x20b0
arch_stack_walk+0x83/0xf0
stack_trace_save+0x8c/0xc0
__create_object+0x389/0xc10
kmem_cache_alloc+0x235/0x3e0
getname_flags.part.0+0x50/0x4f0
getname+0x8e/0xd0
do_sys_openat2+0xf9/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa211d40b19
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:00007fa20f2b6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fa211e53f60 RCX: 00007fa211d40b19
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffffffffff9c
RBP: 00007fa211d9af6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe8b87fd3f R14: 00007fa20f2b6300 R15: 0000000000022000
irq event stamp: 1126
hardirqs last enabled at (1125): [] syscall_enter_from_user_mode+0x1d/0x50
hardirqs last disabled at (1126): [] sysvec_call_function_single+0xb/0xc0
softirqs last enabled at (928): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (923): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
cgroup: none used incorrectly
cgroup: none used incorrectly
cgroup: none used incorrectly
syz-executor.4 calls setitimer() with new_value NULL pointer. Misfeature support will be removed
FAT-fs (loop3): bogus number of reserved sectors
FAT-fs (loop3): Can't find a valid FAT filesystem
FAT-fs (loop3): bogus number of reserved sectors
FAT-fs (loop3): Can't find a valid FAT filesystem
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
hrtimer: interrupt took 17052 ns
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.2 not setting count and/or reply_len properly
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.2 not setting count and/or reply_len properly
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.2 not setting count and/or reply_len properly
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.7 not setting count and/or reply_len properly
sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.3 not setting count and/or reply_len properly
----------------
Code disassembly (best guess):
0: 01 d0 add %edx,%eax
2: 48 d1 f8 sar %rax
5: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx
a: 48 89 d8 mov %rbx,%rax
d: 48 c1 e8 03 shr $0x3,%rax
11: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx
16: 48 89 d8 mov %rbx,%rax
19: 83 e0 07 and $0x7,%eax
1c: 83 c0 03 add $0x3,%eax
1f: 38 d0 cmp %dl,%al
21: 7c 04 jl 0x27
23: 84 d2 test %dl,%dl
25: 75 50 jne 0x77
27: 48 63 03 movslq (%rbx),%rax
* 2a: 48 01 d8 add %rbx,%rax <-- trapping instruction
2d: 48 39 c1 cmp %rax,%rcx
30: 73 b0 jae 0xffffffe2
32: 4c 8d 63 fc lea -0x4(%rbx),%r12
36: 49 39 ec cmp %rbp,%r12
39: 73 b3 jae 0xffffffee
3b: 4d 29 ee sub %r13,%r14
3e: 49 rex.WB
3f: c1 .byte 0xc1