------------[ cut here ]------------
debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0)
WARNING: kernel/sched/sched.h:1641 at lockdep_assert_rq_held kernel/sched/sched.h:1641 [inline], CPU#0: syz.2.219/6975
WARNING: kernel/sched/sched.h:1641 at lockdep_assert_rq_held kernel/sched/sched.h:1638 [inline], CPU#0: syz.2.219/6975
WARNING: kernel/sched/sched.h:1641 at update_rq_clock+0x40a/0xd20 kernel/sched/core.c:865, CPU#0: syz.2.219/6975
Modules linked in:
CPU: 0 UID: 0 PID: 6975 Comm: syz.2.219 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1641 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1638 [inline]
RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:865
Code: ab c8 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 58 9e e4 09 a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 c0 0b 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc90002d97810 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853b600 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8e180820 RDI: ffffffff8c400380
RBP: ffffc90002d979b8 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff91226597 R11: 0000000000000000 R12: ffffffff91229944
R13: ffff8880b853c4e0 R14: ffff88801eac9f00 R15: ffff8880b843c198
FS: 00007fedf31dd6c0(0000) GS:ffff888123df1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000e67000 CR3: 000000007a6b8000 CR4: 00000000003526f0
Call Trace:
<TASK>
pick_next_task kernel/sched/core.c:6338 [inline]
__schedule+0x1e2d/0x6730 kernel/sched/core.c:7149
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa00 kernel/entry/common.c:167
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: f6 e8 5d 00 48 89 df 5b e9 7d 63 63 00 be 03 00 00 00 5b e9 52 af 11 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 8b 05 65 c7 59 12 48 8b 34 24 65 48 8b 15 41 c7 59
RSP: 0018:ffffc90002d97ad8 EFLAGS: 00000246
RAX: 0000000000080000 RBX: 0000000000000000 RCX: ffffc9000652a000
RDX: 0000000000080000 RSI: ffffffff81cec75b RDI: ffff88802eee5d00
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008
R13: ffff88801bc06c00 R14: ffff8880334a3600 R15: 0000000000001000
queue_work_on+0x141/0x1e0 kernel/workqueue.c:2457
queue_work include/linux/workqueue.h:699 [inline]
snd_virmidi_output_trigger+0xf6/0x140 sound/core/seq/seq_virmidi.c:178
snd_rawmidi_output_trigger sound/core/rawmidi.c:213 [inline]
snd_rawmidi_output_trigger sound/core/rawmidi.c:209 [inline]
snd_rawmidi_kernel_write1+0x51f/0x7c0 sound/core/rawmidi.c:1576
snd_rawmidi_write+0x2dc/0xc60 sound/core/rawmidi.c:1629
vfs_write+0x2aa/0x1050 fs/read_write.c:685
ksys_write+0x1f8/0x250 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fedf239de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fedf31dd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fedf2625fa0 RCX: 00007fedf239de59
RDX: 000000100000a3d9 RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007fedf2433e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fedf2626038 R14: 00007fedf2625fa0 R15: 00007ffcea473a68
</TASK>
----------------
Code disassembly (best guess):
0: f6 e8 imul %al
2: 5d pop %rbp
3: 00 48 89 add %cl,-0x77(%rax)
6: df 5b e9 fistps -0x17(%rbx)
9: 7d 63 jge 0x6e
b: 63 00 movsxd (%rax),%eax
d: be 03 00 00 00 mov $0x3,%esi
12: 5b pop %rbx
13: e9 52 af 11 03 jmp 0x311af6a
18: 66 90 xchg %ax,%ax
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 90 nop
26: 90 nop
27: 90 nop
28: 90 nop
29: 90 nop
* 2a: f3 0f 1e fa endbr64 <-- trapping instruction
2e: 65 8b 05 65 c7 59 12 mov %gs:0x1259c765(%rip),%eax # 0x1259c79a
35: 48 8b 34 24 mov (%rsp),%rsi
39: 65 gs
3a: 48 rex.W
3b: 8b .byte 0x8b
3c: 15 .byte 0x15
3d: 41 c7 rex.B (bad)
3f: 59 pop %rcx