perf: interrupt took too long (4053 > 4035), lowering kernel.perf_event_max_sample_rate to 49000
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc7-next-20220930 #1 Not tainted
------------------------------------------------------
syz-executor.3/3706 is trying to acquire lock:
ffffffff853faab8 ((console_sem).lock){-...}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff888008f0ec20 (&ctx->lock){-...}-{2:2}, at: perf_event_task_tick+0x1ce/0x1050
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+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
do_con_write+0xc05/0x1d50
con_write+0x21/0x40
n_tty_write+0x4d4/0xfe0
file_tty_write.constprop.0+0x455/0x8a0
vfs_write+0x9c3/0xd90
ksys_write+0x127/0x250
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_event_task_tick+0xbeb/0x1050
scheduler_tick+0x17e/0x350
update_process_times+0x138/0x190
tick_sched_handle+0x9b/0x180
tick_sched_timer+0xf2/0x120
__hrtimer_run_queues+0x184/0xb50
hrtimer_interrupt+0x315/0x770
__sysvec_apic_timer_interrupt+0x144/0x500
sysvec_apic_timer_interrupt+0x89/0xc0
asm_sysvec_apic_timer_interrupt+0x16/0x20
__sanitizer_cov_trace_pc+0x0/0x70
futex_wake_mark+0x81/0x1a0
futex_wake+0x3bb/0x490
do_futex+0x27f/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 ***
2 locks held by syz-executor.3/3706:
#0: ffff888008871620 (&futex_queues[i].lock){+.+.}-{2:2}, at: futex_wake+0x1bc/0x490
#1: ffff888008f0ec20 (&ctx->lock){-...}-{2:2}, at: perf_event_task_tick+0x1ce/0x1050
stack backtrace:
CPU: 0 PID: 3706 Comm: syz-executor.3 Not tainted 6.0.0-rc7-next-20220930 #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_event_task_tick+0xbeb/0x1050
Code: e9 34 fd ff ff e8 05 33 ef ff 65 44 8b 35 89 9c ab 7e 31 ff 44 89 f6 e8 a3 2f ef ff 45 85 f6 0f 84 04 01 00 00 e8 e5 32 ef ff <0f> 0b e9 60 fa ff ff e8 d9 32 ef ff 65 8b 1d 5e 9c ab 7e 31 ff 89
RSP: 0018:ffff88806ce09d08 EFLAGS: 00010046
RAX: 0000000080010002 RBX: ffff888008660000 RCX: 0000000000000000
RDX: ffff88803f479ac0 RSI: ffffffff8156d94b RDI: 0000000000000005
RBP: ffff888008f0ed08 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888008660098
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
scheduler_tick+0x17e/0x350
update_process_times+0x138/0x190
tick_sched_handle+0x9b/0x180
tick_sched_timer+0xf2/0x120
__hrtimer_run_queues+0x184/0xb50
hrtimer_interrupt+0x315/0x770
__sysvec_apic_timer_interrupt+0x144/0x500
sysvec_apic_timer_interrupt+0x89/0xc0
asm_sysvec_apic_timer_interrupt+0x16/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70
Code: 00 00 5d e9 92 c0 c4 00 66 90 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 e9 1d 2f 1a 03 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <65> 8b 05 49 62 bc 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffff888040d47c70 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff888040d67cc0 RCX: ffffc90008409000
RDX: 1ffff110081acfa2 RSI: ffffffff813b7493 RDI: ffff888040d67d10
RBP: ffff888040d67cc0 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88800d993580
R13: ffff888040d47cf0 R14: 00000000ffffffff R15: 00007f55bce05000
futex_wake_mark+0x81/0x1a0
futex_wake+0x3bb/0x490
do_futex+0x27f/0x380
__x64_sys_futex+0x1c6/0x4d0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f55bccf2b19
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:00007f55ba268218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f55bce05f68 RCX: 00007f55bccf2b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f55bce05f6c
RBP: 00007f55bce05f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 00007f55bce05f6c
R13: 00007ffef4963d3f R14: 00007f55ba268300 R15: 0000000000022000
WARNING: CPU: 0 PID: 3706 at kernel/events/core.c:2233 perf_event_task_tick+0xbeb/0x1050
Modules linked in:
CPU: 0 PID: 3706 Comm: syz-executor.3 Not tainted 6.0.0-rc7-next-20220930 #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_event_task_tick+0xbeb/0x1050
Code: e9 34 fd ff ff e8 05 33 ef ff 65 44 8b 35 89 9c ab 7e 31 ff 44 89 f6 e8 a3 2f ef ff 45 85 f6 0f 84 04 01 00 00 e8 e5 32 ef ff <0f> 0b e9 60 fa ff ff e8 d9 32 ef ff 65 8b 1d 5e 9c ab 7e 31 ff 89
RSP: 0018:ffff88806ce09d08 EFLAGS: 00010046
RAX: 0000000080010002 RBX: ffff888008660000 RCX: 0000000000000000
RDX: ffff88803f479ac0 RSI: ffffffff8156d94b RDI: 0000000000000005
RBP: ffff888008f0ed08 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888008660098
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007f55ba268700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f8de64260 CR3: 00000000302d0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
scheduler_tick+0x17e/0x350
update_process_times+0x138/0x190
tick_sched_handle+0x9b/0x180
tick_sched_timer+0xf2/0x120
__hrtimer_run_queues+0x184/0xb50
hrtimer_interrupt+0x315/0x770
__sysvec_apic_timer_interrupt+0x144/0x500
sysvec_apic_timer_interrupt+0x89/0xc0
asm_sysvec_apic_timer_interrupt+0x16/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70
Code: 00 00 5d e9 92 c0 c4 00 66 90 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 e9 1d 2f 1a 03 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <65> 8b 05 49 62 bc 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffff888040d47c70 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff888040d67cc0 RCX: ffffc90008409000
RDX: 1ffff110081acfa2 RSI: ffffffff813b7493 RDI: ffff888040d67d10
RBP: ffff888040d67cc0 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88800d993580
R13: ffff888040d47cf0 R14: 00000000ffffffff R15: 00007f55bce05000
futex_wake_mark+0x81/0x1a0
futex_wake+0x3bb/0x490
do_futex+0x27f/0x380
__x64_sys_futex+0x1c6/0x4d0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f55bccf2b19
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:00007f55ba268218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f55bce05f68 RCX: 00007f55bccf2b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f55bce05f6c
RBP: 00007f55bce05f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 00007f55bce05f6c
R13: 00007ffef4963d3f R14: 00007f55ba268300 R15: 0000000000022000
irq event stamp: 1186
hardirqs last enabled at (1185): [] asm_sysvec_irq_work+0x16/0x20
hardirqs last disabled at (1186): [] sysvec_apic_timer_interrupt+0xb/0xc0
softirqs last enabled at (1012): [] __irq_exit_rcu+0x11b/0x180
softirqs last disabled at (1007): [] __irq_exit_rcu+0x11b/0x180
---[ end trace 0000000000000000 ]---
perf: interrupt took too long (6347 > 6337), lowering kernel.perf_event_max_sample_rate to 31000
perf: interrupt took too long (7934 > 7933), lowering kernel.perf_event_max_sample_rate to 25000
perf: interrupt took too long (9918 > 9917), lowering kernel.perf_event_max_sample_rate to 20000
audit: type=1400 audit(1664851706.603:9): avc: denied { execstack } for pid=3764 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
loop5: detected capacity change from 0 to 8
FAT-fs (loop5): Unrecognized mount option "mask=MAY_EXEC" or missing value
loop5: detected capacity change from 0 to 8
FAT-fs (loop5): Unrecognized mount option "mask=MAY_EXEC" or missing value
audit: type=1400 audit(1664851706.763:10): avc: denied { relabelfrom } for pid=3785 comm="syz-executor.3" name="" dev="pipefs" ino=13760 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1
audit: type=1400 audit(1664851706.763:11): avc: denied { relabelto } for pid=3785 comm="syz-executor.3" name="" dev="pipefs" ino=13760 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tty_device_t:s0 tclass=fifo_file permissive=1
audit: type=1400 audit(1664851706.764:12): avc: denied { ioctl } for pid=3785 comm="syz-executor.3" path="pipe:[13760]" dev="pipefs" ino=13760 ioctlcmd=0x937e scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tty_device_t:s0 tclass=fifo_file permissive=1
loop6: detected capacity change from 0 to 164
SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22
loop6: detected capacity change from 0 to 164
SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22
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):
0: 00 00 add %al,(%rax)
2: 5d pop %rbp
3: e9 92 c0 c4 00 jmpq 0xc4c09a
8: 66 90 xchg %ax,%ax
a: 48 8b be a8 01 00 00 mov 0x1a8(%rsi),%rdi
11: e8 b4 ff ff ff callq 0xffffffca
16: 31 c0 xor %eax,%eax
18: e9 1d 2f 1a 03 jmpq 0x31a2f3a
1d: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
24: 00 00 00 00
28: 66 90 xchg %ax,%ax
* 2a: 65 8b 05 49 62 bc 7e mov %gs:0x7ebc6249(%rip),%eax # 0x7ebc627a <-- trapping instruction
31: 89 c1 mov %eax,%ecx
33: 48 8b 34 24 mov (%rsp),%rsi
37: 81 e1 00 01 00 00 and $0x100,%ecx
3d: 65 gs
3e: 48 rex.W
3f: 8b .byte 0x8b