------------[ cut here ]------------
task_rq(p) != rq
WARNING: kernel/sched/fair.c:7656 at hrtick_start_fair+0x196/0x1f0 kernel/sched/fair.c:7656, CPU#1: udevd/5629
Modules linked in:
CPU: 1 UID: 0 PID: 5629 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:hrtick_start_fair+0x196/0x1f0 kernel/sched/fair.c:7656
Code: 42 80 3c 20 00 74 08 4c 89 ff e8 85 e3 97 00 4d 39 37 0f 85 0c ff ff ff 48 89 df 5b 41 5c 41 5d 41 5e 41 5f e9 4b 65 fa ff 90 <0f> 0b 90 e9 d1 fe ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 82
RSP: 0018:ffffc9000428f840 EFLAGS: 00010006
RAX: ffff8880b863ba40 RBX: ffff8880b873ba40 RCX: ffffffff8197c7de
RDX: 0000000000000000 RSI: ffff88803a319f00 RDI: ffff8880b873ba40
RBP: dffffc0000000000 R08: ffffffff8fcf0b0f R09: 1ffffffff1f9e161
R10: dffffc0000000000 R11: fffffbfff1f9e162 R12: dffffc0000000000
R13: 1ffff110170e78d6 R14: ffff88803a319f00 R15: ffffffff8dc217d0
FS:  00007fbdc8ee5880(0000) GS:ffff888125b76000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d763fff CR3: 0000000046a32000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 set_next_task_fair+0xa68/0xce0 kernel/sched/fair.c:15058
 put_prev_set_next_task kernel/sched/sched.h:2770 [inline]
 pick_next_task kernel/sched/core.c:6443 [inline]
 __schedule+0x3e03/0x5550 kernel/sched/core.c:7144
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7553
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8c0 kernel/entry/common.c:167
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5874
Code: ff ff ff e8 81 fe 9b 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 2b 79 19 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 50 c6 9f 09 cc 48 8d 3d e8 1a 31
RSP: 0018:ffffc9000428fc00 EFLAGS: 00000286
RAX: 56389f35f69f4200 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000026c38300 RSI: ffffffff8dbda93e RDI: ffffffff8bcc4580
RBP: ffffffff825853e9 R08: ffffffff825853e9 R09: ffff888038364a08
R10: dffffc0000000000 R11: ffffffff82585370 R12: 0000000000000000
R13: ffff888038364a08 R14: 0000000000000001 R15: 0000000000000246
 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 ep_poll_callback+0x79/0x800 fs/eventpoll.c:1484
 __wake_up_common kernel/sched/wait.c:108 [inline]
 __wake_up_common_lock+0x136/0x1e0 kernel/sched/wait.c:125
 fsnotify_insert_event+0x31b/0x420 fs/notify/notification.c:127
 fsnotify_add_event include/linux/fsnotify_backend.h:759 [inline]
 inotify_handle_inode_event+0x44c/0x6b0 fs/notify/inotify/inotify_fsnotify.c:126
 inotify_ignored_and_remove_idr+0x29/0x70 fs/notify/inotify/inotify_user.c:526
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:806 [inline]
 __se_sys_inotify_rm_watch+0x151/0x1f0 fs/notify/inotify/inotify_user.c:787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbdc904da07
Code: 73 01 c3 48 8b 0d f1 f3 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 ff 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 f3 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007fff53938de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ff
RAX: ffffffffffffffda RBX: 000055753610e680 RCX: 00007fbdc904da07
RDX: 0000000000000007 RSI: 0000000000000067 RDI: 0000000000000007
RBP: 0000000000000067 R08: 00000000000001e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff53938df0
R13: 0000000003938700 R14: 000055752a015100 R15: 000055752a015140
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff                   	ljmp   (bad)
   1:	e8 81 fe 9b 09       	call   0x99bfe87
   6:	f7 44 24 08 00 02 00 	testl  $0x200,0x8(%rsp)
   d:	00
   e:	0f 84 3a ff ff ff    	je     0xffffff4e
  14:	65 48 8b 05 2b 79 19 	mov    %gs:0x1119792b(%rip),%rax        # 0x11197947
  1b:	11
  1c:	48 3b 44 24 58       	cmp    0x58(%rsp),%rax
  21:	75 33                	jne    0x56
  23:	fb                   	sti
  24:	48 83 c4 60          	add    $0x60,%rsp
* 28:	5b                   	pop    %rbx <-- trapping instruction
  29:	41 5c                	pop    %r12
  2b:	41 5d                	pop    %r13
  2d:	41 5e                	pop    %r14
  2f:	41 5f                	pop    %r15
  31:	5d                   	pop    %rbp
  32:	e9 50 c6 9f 09       	jmp    0x99fc687
  37:	cc                   	int3
  38:	48                   	rex.W
  39:	8d                   	.byte 0x8d
  3a:	3d                   	.byte 0x3d
  3b:	e8                   	.byte 0xe8
  3c:	1a 31                	sbb    (%rcx),%dh