audit: type=1400 audit(1664452841.578:9): avc: denied { read } for pid=3550 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-rc7-next-20220928 #1 Not tainted
------------------------------------------------------
syz-executor.2/3554 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800edfe820 (&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
schedule+0xda/0x1b0
futex_wait_queue+0xf5/0x1e0
futex_wait+0x28e/0x690
do_futex+0x2ff/0x380
__x64_sys_futex+0x1c6/0x4d0
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
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
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
unwind_next_frame+0x12b/0x20b0
arch_stack_walk+0x83/0xf0
stack_trace_save+0x8c/0xc0
__create_object+0x389/0xc10
kmem_cache_alloc+0x235/0x3e0
security_file_alloc+0x34/0x170
__alloc_file+0xb6/0x240
alloc_empty_file+0x6d/0x170
path_openat+0xd4/0x2770
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__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.2/3554:
#0: ffff88806cf3f020 (&cpuctx_lock){-...}-{2:2}, at: event_function+0x16f/0x3d0
#1: ffff88800edfe820 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
stack backtrace:
CPU: 1 PID: 3554 Comm: syz-executor.2 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: ffff888039f805c8 RCX: 0000000000000000
RDX: ffff888040799ac0 RSI: ffffffff8157c2ce RDI: 0000000000000005
RBP: ffff888039f805c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: 0000000000000000
R13: ffff888039f80658 R14: ffff88800edfe800 R15: ffff888039f805c8
__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:unwind_next_frame+0x12b/0x20b0
Code: 85 be 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 66 41 4c 89 e2 48 c1 ea 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 <0f> 85 2e 08 00 00 48 89 e9 41 0f b6 46 41 48 ba 00 00 00 00 00 fc
RSP: 0018:ffff888040f77818 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffffffff0e0c0e0
RDX: 0000000000000001 RSI: ffffffff817bcf29 RDI: ffff88804079ae20
RBP: ffff888040f778f0 R08: ffffffff85e802e4 R09: ffffffff85e802e8
R10: ffffed10081eef20 R11: ffff888040f778d8 R12: ffff888040f778d9
R13: ffff888040f778f8 R14: ffff888040f77898 R15: ffff888014f94bd0
arch_stack_walk+0x83/0xf0
stack_trace_save+0x8c/0xc0
__create_object+0x389/0xc10
kmem_cache_alloc+0x235/0x3e0
security_file_alloc+0x34/0x170
__alloc_file+0xb6/0x240
alloc_empty_file+0x6d/0x170
path_openat+0xd4/0x2770
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8c00322b19
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:00007f8bfd898188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8c00435f60 RCX: 00007f8c00322b19
RDX: 0000000000101042 RSI: 0000000020000100 RDI: ffffffffffffff9c
RBP: 00007f8c0037cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9ba93c6f R14: 00007f8bfd898300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3554 at kernel/events/core.c:2047 perf_group_detach+0x99e/0x12f0
Modules linked in:
CPU: 1 PID: 3554 Comm: syz-executor.2 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: ffff888039f805c8 RCX: 0000000000000000
RDX: ffff888040799ac0 RSI: ffffffff8157c2ce RDI: 0000000000000005
RBP: ffff888039f805c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b405b R12: 0000000000000000
R13: ffff888039f80658 R14: ffff88800edfe800 R15: ffff888039f805c8
FS: 00007f8bfd898700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563027b1a080 CR3: 000000001546e000 CR4: 0000000000350fe0
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:unwind_next_frame+0x12b/0x20b0
Code: 85 be 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 66 41 4c 89 e2 48 c1 ea 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 <0f> 85 2e 08 00 00 48 89 e9 41 0f b6 46 41 48 ba 00 00 00 00 00 fc
RSP: 0018:ffff888040f77818 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffffffff0e0c0e0
RDX: 0000000000000001 RSI: ffffffff817bcf29 RDI: ffff88804079ae20
RBP: ffff888040f778f0 R08: ffffffff85e802e4 R09: ffffffff85e802e8
R10: ffffed10081eef20 R11: ffff888040f778d8 R12: ffff888040f778d9
R13: ffff888040f778f8 R14: ffff888040f77898 R15: ffff888014f94bd0
arch_stack_walk+0x83/0xf0
stack_trace_save+0x8c/0xc0
__create_object+0x389/0xc10
kmem_cache_alloc+0x235/0x3e0
security_file_alloc+0x34/0x170
__alloc_file+0xb6/0x240
alloc_empty_file+0x6d/0x170
path_openat+0xd4/0x2770
do_filp_open+0x1b6/0x410
do_sys_openat2+0x171/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8c00322b19
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:00007f8bfd898188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8c00435f60 RCX: 00007f8c00322b19
RDX: 0000000000101042 RSI: 0000000020000100 RDI: ffffffffffffff9c
RBP: 00007f8c0037cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9ba93c6f R14: 00007f8bfd898300 R15: 0000000000022000
irq event stamp: 3536
hardirqs last enabled at (3535): [] ___slab_alloc+0x86e/0x1080
hardirqs last disabled at (3536): [] sysvec_call_function_single+0xb/0xc0
softirqs last enabled at (2736): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (2497): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
process 'syz-executor.2' launched './file0' with NULL argv: empty string added
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
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
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
----------------
Code disassembly (best guess), 3 bytes skipped:
0: 00 00 add %al,(%rax)
2: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
9: fc ff df
c: 4d 8d 66 41 lea 0x41(%r14),%r12
10: 4c 89 e2 mov %r12,%rdx
13: 48 c1 ea 03 shr $0x3,%rdx
17: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
1b: 4c 89 e2 mov %r12,%rdx
1e: 83 e2 07 and $0x7,%edx
21: 38 d0 cmp %dl,%al
23: 7f 08 jg 0x2d
25: 84 c0 test %al,%al
* 27: 0f 85 2e 08 00 00 jne 0x85b <-- trapping instruction
2d: 48 89 e9 mov %rbp,%rcx
30: 41 0f b6 46 41 movzbl 0x41(%r14),%eax
35: 48 rex.W
36: ba 00 00 00 00 mov $0x0,%edx
3b: 00 fc add %bh,%ah