audit: type=1400 audit(1663160593.476:8): avc: denied { kernel } for pid=3863 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
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc5-next-20220914 #1 Not tainted
------------------------------------------------------
syz-executor.3/3865 is trying to acquire lock:
ffffffff853fa878 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800eda8c20 (&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+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_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
__get_user_nocheck_4+0x8/0x20
futex_get_value_locked+0x53/0x100
futex_wait_setup+0x101/0x230
futex_wait+0x264/0x690
do_futex+0x2ff/0x380
__x64_sys_futex+0x1c6/0x4d0
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 ***
3 locks held by syz-executor.3/3865:
#0: ffff8880088bbfa0 (&futex_queues[i].lock){+.+.}-{2:2}, at: futex_q_lock+0x56/0x70
#1: ffff88806cf3d120 (&cpuctx_lock){-...}-{2:2}, at: event_function+0x16f/0x3d0
#2: ffff88800eda8c20 (&ctx->lock){-...}-{2:2}, at: event_function+0x182/0x3d0
stack backtrace:
CPU: 1 PID: 3865 Comm: syz-executor.3 Not tainted 6.0.0-rc5-next-20220914 #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 22 57 ee ff 65 44 8b 25 96 b5 aa 7e 31 ff 44 89 e6 e8 c0 53 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 02 57 ee ff <0f> 0b e9 a9 f8 ff ff e8 f6 56 ee ff 65 8b 1d 6b b5 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010003 RBX: ffff88803c4e0000 RCX: 0000000000000000
RDX: ffff88800ff43580 RSI: ffffffff8157c03e RDI: 0000000000000005
RBP: ffff88803c4e0000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: 0000000000000000
R13: ffff88803c4e0090 R14: ffff88800eda8c00 R15: ffff88803c4e0000
__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:__get_user_nocheck_4+0x8/0x20
Code: 66 90 0f 01 cb 0f ae e8 0f b7 10 31 c0 0f 01 ca e9 fd 05 4d 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 01 cb 0f ae e8 8b 10 <31> c0 0f 01 ca e9 de 05 4d 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f
RSP: 0018:ffff888036ab7af8 EFLAGS: 00040202
RAX: 00007fd6f6d41f68 RBX: ffff888036ab7b70 RCX: ffffc9000660a000
RDX: 0000000000000000 RSI: ffffffff813af9ec RDI: ffff88800ff449f0
RBP: ffff88800ff43580 R08: 0000000000000001 R09: ffff888036ab7a9b
R10: ffffed1006d56f53 R11: 0000000000000001 R12: 00007fd6f6d41f68
R13: ffffed1006d56f86 R14: ffff888036ab7cc0 R15: 0000000000000000
futex_get_value_locked+0x53/0x100
futex_wait_setup+0x101/0x230
futex_wait+0x264/0x690
do_futex+0x2ff/0x380
__x64_sys_futex+0x1c6/0x4d0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd6f6c2eb19
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:00007fd6f41a4218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fd6f6d41f68 RCX: 00007fd6f6c2eb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd6f6d41f68
RBP: 00007fd6f6d41f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd6f6d41f6c
R13: 00007ffd6d4ff0ef R14: 00007fd6f41a4300 R15: 0000000000022000
WARNING: CPU: 1 PID: 3865 at kernel/events/core.c:2047 perf_group_detach+0x99e/0x12f0
Modules linked in:
CPU: 1 PID: 3865 Comm: syz-executor.3 Not tainted 6.0.0-rc5-next-20220914 #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 22 57 ee ff 65 44 8b 25 96 b5 aa 7e 31 ff 44 89 e6 e8 c0 53 ee ff 45 85 e4 0f 84 0a 05 00 00 e8 02 57 ee ff <0f> 0b e9 a9 f8 ff ff e8 f6 56 ee ff 65 8b 1d 6b b5 aa 7e 31 ff 89
RSP: 0018:ffff88806cf09e60 EFLAGS: 00010046
RAX: 0000000080010003 RBX: ffff88803c4e0000 RCX: 0000000000000000
RDX: ffff88800ff43580 RSI: ffffffff8157c03e RDI: 0000000000000005
RBP: ffff88803c4e0000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865ac05b R12: 0000000000000000
R13: ffff88803c4e0090 R14: ffff88800eda8c00 R15: ffff88803c4e0000
FS: 00007fd6f41a4700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5dcf897088 CR3: 000000001abb2000 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:__get_user_nocheck_4+0x8/0x20
Code: 66 90 0f 01 cb 0f ae e8 0f b7 10 31 c0 0f 01 ca e9 fd 05 4d 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 01 cb 0f ae e8 8b 10 <31> c0 0f 01 ca e9 de 05 4d 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f
RSP: 0018:ffff888036ab7af8 EFLAGS: 00040202
RAX: 00007fd6f6d41f68 RBX: ffff888036ab7b70 RCX: ffffc9000660a000
RDX: 0000000000000000 RSI: ffffffff813af9ec RDI: ffff88800ff449f0
RBP: ffff88800ff43580 R08: 0000000000000001 R09: ffff888036ab7a9b
R10: ffffed1006d56f53 R11: 0000000000000001 R12: 00007fd6f6d41f68
R13: ffffed1006d56f86 R14: ffff888036ab7cc0 R15: 0000000000000000
futex_get_value_locked+0x53/0x100
futex_wait_setup+0x101/0x230
futex_wait+0x264/0x690
do_futex+0x2ff/0x380
__x64_sys_futex+0x1c6/0x4d0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd6f6c2eb19
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:00007fd6f41a4218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fd6f6d41f68 RCX: 00007fd6f6c2eb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd6f6d41f68
RBP: 00007fd6f6d41f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd6f6d41f6c
R13: 00007ffd6d4ff0ef R14: 00007fd6f41a4300 R15: 0000000000022000
irq event stamp: 1120
hardirqs last enabled at (1119): [] syscall_enter_from_user_mode+0x1d/0x50
hardirqs last disabled at (1120): [] sysvec_call_function_single+0xb/0xc0
softirqs last enabled at (936): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (729): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
Bluetooth: hci6: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci6: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci6: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci6: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci6: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci6: unexpected cc 0x0c38 length: 249 > 2
Bluetooth: hci6: HCI_REQ-0x0c1a
Bluetooth: hci0: command 0x0409 tx timeout
Bluetooth: hci1: Opcode 0x c03 failed: -110
Bluetooth: hci2: Opcode 0x c03 failed: -110
Bluetooth: hci7: Opcode 0x c03 failed: -110
Bluetooth: hci3: Opcode 0x c03 failed: -110
Bluetooth: hci6: command 0x0409 tx timeout
Bluetooth: hci0: command 0x041b tx timeout
Bluetooth: hci6: command 0x041b tx timeout
Bluetooth: hci0: command 0x040f tx timeout
Bluetooth: hci6: command 0x040f tx timeout
Bluetooth: hci1: Opcode 0x c03 failed: -110
Bluetooth: hci2: Opcode 0x c03 failed: -110
Bluetooth: hci3: Opcode 0x c03 failed: -110
Bluetooth: hci7: Opcode 0x c03 failed: -110
Bluetooth: hci0: command 0x0419 tx timeout
Bluetooth: hci6: command 0x0419 tx timeout
Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci1: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2
Bluetooth: hci1: HCI_REQ-0x0c1a
----------------
Code disassembly (best guess):
0: 66 90 xchg %ax,%ax
2: 0f 01 cb stac
5: 0f ae e8 lfence
8: 0f b7 10 movzwl (%rax),%edx
b: 31 c0 xor %eax,%eax
d: 0f 01 ca clac
10: e9 fd 05 4d 00 jmpq 0x4d0612
15: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
1c: 00 00 00 00
20: 66 90 xchg %ax,%ax
22: 0f 01 cb stac
25: 0f ae e8 lfence
28: 8b 10 mov (%rax),%edx
* 2a: 31 c0 xor %eax,%eax <-- trapping instruction
2c: 0f 01 ca clac
2f: e9 de 05 4d 00 jmpq 0x4d0612
34: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
3b: 00 00 00 00
3f: 0f .byte 0xf