Call Trace:
======================================================
WARNING: possible circular locking dependency detected
5.17.0-rc8-next-20220318 #1 Not tainted
------------------------------------------------------
syz-executor.7/6287 is trying to acquire lock:
ffffffff851f5518 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0xe/0x60
but task is already holding lock:
ffff88801d177c20 (&ctx->lock){....}-{2:2}, at: __perf_install_in_context+0x12d/0x310
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+0x519/0x1950
__schedule+0xebf/0x21a0
schedule+0xd2/0x1f0
exit_to_user_mode_prepare+0x114/0x1a0
syscall_exit_to_user_mode+0x19/0x50
do_syscall_64+0x48/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
-> #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+0x343/0x490
copy_process+0x4272/0x6d10
kernel_clone+0xe7/0xa60
kernel_thread+0xb5/0xf0
rest_init+0x24/0x3d0
start_kernel+0x489/0x4aa
secondary_startup_64_no_verify+0xd5/0xdb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
_raw_spin_lock_irqsave+0x39/0x50
try_to_wake_up+0xa5/0x1060
up+0x75/0xb0
__up_console_sem+0x6e/0x80
console_unlock+0x603/0xd40
vprintk_emit+0x1b4/0x550
vprintk+0x80/0x90
_printk+0xba/0xed
regdb_fw_cb.cold+0x6c/0xa7
request_firmware_work_func+0x12e/0x230
process_one_work+0xa1c/0x16a0
worker_thread+0x637/0x1250
kthread+0x2f0/0x3a0
ret_from_fork+0x22/0x30
-> #0 ((console_sem).lock){-.-.}-{2:2}:
__lock_acquire+0x2c2f/0x6120
lock_acquire+0x1a2/0x4d0
_raw_spin_lock_irqsave+0x39/0x50
down_trylock+0xe/0x60
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x162/0x550
vprintk+0x80/0x90
_printk+0xba/0xed
show_trace_log_lvl+0x57/0x2bb
ex_handler_msr+0x311/0x3a0
fixup_exception+0x307/0xff0
exc_general_protection+0xf6/0x2d0
asm_exc_general_protection+0x1e/0x30
x86_pmu_enable_all+0x2f7/0x3c0
x86_pmu_enable+0x580/0xd90
ctx_resched+0x2b0/0x390
__perf_install_in_context+0x285/0x310
remote_function+0x125/0x1b0
generic_exec_single+0x203/0x300
smp_call_function_single+0x189/0x460
task_function_call+0xe5/0x170
perf_install_in_context+0x2cb/0x550
__do_sys_perf_event_open+0x1bf0/0x3040
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
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 ***
4 locks held by syz-executor.7/6287:
#0: ffff88801792eb20 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0x1023/0x3040
#1: ffff88801d177cb0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x17cd/0x3040
#2: ffff88806ce3f220 (&cpuctx_lock){-...}-{2:2}, at: __perf_install_in_context+0xf4/0x310
#3: ffff88801d177c20 (&ctx->lock){....}-{2:2}, at: __perf_install_in_context+0x12d/0x310
stack backtrace:
CPU: 0 PID: 6287 Comm: syz-executor.7 Not tainted 5.17.0-rc8-next-20220318 #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+0x25f/0x2e0
__lock_acquire+0x2c2f/0x6120
lock_acquire+0x1a2/0x4d0
_raw_spin_lock_irqsave+0x39/0x50
down_trylock+0xe/0x60
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x162/0x550
vprintk+0x80/0x90
_printk+0xba/0xed
show_trace_log_lvl+0x57/0x2bb
ex_handler_msr+0x311/0x3a0
fixup_exception+0x307/0xff0
exc_general_protection+0xf6/0x2d0
asm_exc_general_protection+0x1e/0x30
RIP: 0010:x86_pmu_enable_all+0x2f7/0x3c0
Code: 00 8b 7c 24 1c 48 8b 44 24 10 e8 64 58 3f 03 89 44 24 10 e8 fb 71 42 00 4c 89 fa 8b 4c 24 08 4c 89 f8 03 4c 24 10 48 c1 ea 20 <0f> 30 66 90 e8 e0 71 42 00 e9 cc fd ff ff 48 83 c4 20 5b 5d 41 5c
RSP: 0018:ffff888043edf968 EFLAGS: 00010016
RAX: 0000000f004000ff RBX: ffff8880475705b8 RCX: 00000000c0010202
RDX: 000000000000000f RSI: ffffffff8100df45 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff810155ed R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88806ce21c20 R14: ffff88806ce21e20 R15: 0000000f004000ff
x86_pmu_enable+0x580/0xd90
ctx_resched+0x2b0/0x390
__perf_install_in_context+0x285/0x310
remote_function+0x125/0x1b0
generic_exec_single+0x203/0x300
smp_call_function_single+0x189/0x460
task_function_call+0xe5/0x170
perf_install_in_context+0x2cb/0x550
__do_sys_perf_event_open+0x1bf0/0x3040
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f04921e7b19
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:00007f048f75d188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f04922faf60 RCX: 00007f04921e7b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f0492241f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe330bc3f R14: 00007f048f75d300 R15: 0000000000022000
loop3: detected capacity change from 0 to 256
x86_pmu_enable+0x580/0xd90
ctx_resched+0x2b0/0x390
__perf_install_in_context+0x285/0x310
remote_function+0x125/0x1b0
generic_exec_single+0x203/0x300
smp_call_function_single+0x189/0x460
task_function_call+0xe5/0x170
perf_install_in_context+0x2cb/0x550
__do_sys_perf_event_open+0x1bf0/0x3040
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f04921e7b19
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:00007f048f75d188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f04922faf60 RCX: 00007f04921e7b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f0492241f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe330bc3f R14: 00007f048f75d300 R15: 0000000000022000
Call Trace:
x86_pmu_enable+0x580/0xd90
__perf_event_task_sched_out+0x764/0x1950
__schedule+0xebf/0x21a0
preempt_schedule_common+0x45/0xc0
__cond_resched+0x13/0x20
__mutex_lock+0xa3/0x1480
__do_sys_perf_event_open+0x1d13/0x3040
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f04921e7b19
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:00007f048f75d188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f04922faf60 RCX: 00007f04921e7b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f0492241f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe330bc3f R14: 00007f048f75d300 R15: 0000000000022000
FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop6: detected capacity change from 0 to 2048
loop1: detected capacity change from 0 to 2048
9pnet_fd: Insufficient options for proto=fd
loop2: detected capacity change from 0 to 264192
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: writeback.
loop6: detected capacity change from 0 to 2048
loop1: detected capacity change from 0 to 2048
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: writeback.
loop2: detected capacity change from 0 to 264192
----------------
Code disassembly (best guess):
0: 00 8b 7c 24 1c 48 add %cl,0x481c247c(%rbx)
6: 8b 44 24 10 mov 0x10(%rsp),%eax
a: e8 64 58 3f 03 callq 0x33f5873
f: 89 44 24 10 mov %eax,0x10(%rsp)
13: e8 fb 71 42 00 callq 0x427213
18: 4c 89 fa mov %r15,%rdx
1b: 8b 4c 24 08 mov 0x8(%rsp),%ecx
1f: 4c 89 f8 mov %r15,%rax
22: 03 4c 24 10 add 0x10(%rsp),%ecx
26: 48 c1 ea 20 shr $0x20,%rdx
* 2a: 0f 30 wrmsr <-- trapping instruction
2c: 66 90 xchg %ax,%ax
2e: e8 e0 71 42 00 callq 0x427213
33: e9 cc fd ff ff jmpq 0xfffffe04
38: 48 83 c4 20 add $0x20,%rsp
3c: 5b pop %rbx
3d: 5d pop %rbp
3e: 41 5c pop %r12