Oops: general protection fault, probably for non-canonical address 0xdffffc0000000060: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000300-0x0000000000000307]
CPU: 1 UID: 0 PID: 5213 Comm: udevd Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:284
Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 48 89 f0 48 89 f2 0f b6 6b ff 4c 8d 66 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 2c 41 3a 6c 24 ff 74 ae 19 c0
RSP: 0018:ffffc900001a89d8 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff878ea501 RCX: ffffffff8ed6c4a8
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff878ea500
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000000
R10: ffff888109fd4020 R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 000000000000012b R15: ffffffff8ed335b8
FS:  00007f60e20a4880(0000) GS:ffff888268a6a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005612f9cee3e0 CR3: 0000000120e8e000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 count_matching_names kernel/locking/lockdep.c:878 [inline]
 register_lock_class+0x2cb/0x560 kernel/locking/lockdep.c:1344
 __lock_acquire+0x3cb/0x2630 kernel/locking/lockdep.c:5112
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
 complete_with_flags kernel/sched/completion.c:25 [inline]
 complete+0x1d/0x200 kernel/sched/completion.c:52
 transfer drivers/usb/gadget/udc/dummy_hcd.c:1523 [inline]
 dummy_timer+0x11e2/0x3670 drivers/usb/gadget/udc/dummy_hcd.c:1979
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x516/0x990 kernel/time/hrtimer.c:1841
 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1858
 handle_softirqs+0x1dd/0x8f0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x1b/0xc0 kernel/rcu/tree.c:751
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 65 ff 05 73 af 34 0b e8 7e 04 bd 05 48 c7 c3 28 96 cc 8c 89 c5 <83> f8 07 0f 87 82 00 00 00 48 8d 3c ed e0 cb f6 88 48 b8 00 00 00
RSP: 0018:ffffc900021df820 EFLAGS: 00000296
RAX: 0000000000000001 RBX: ffffffff8ccc9628 RCX: ffffffff8221dac9
RDX: ffff888112c59d40 RSI: ffffffff878e9720 RDI: ffffffff878e9760
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 000000000000000d R11: 0000000000000000 R12: ffff8881105663a8
R13: 0000000000000000 R14: ffff88810c29c453 R15: ffff888120763650
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x21e/0x2e0 kernel/locking/lockdep.c:5879
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 fast_dput fs/dcache.c:867 [inline]
 dput.part.0+0x2d4/0x570 fs/dcache.c:924
 dput+0x1f/0x30 fs/dcache.c:920
 step_into_slowpath+0x656/0xf50 fs/namei.c:2065
 step_into fs/namei.c:2099 [inline]
 walk_component fs/namei.c:2235 [inline]
 link_path_walk+0xdc1/0x1b30 fs/namei.c:2597
 path_lookupat+0x74/0xc40 fs/namei.c:2753
 filename_lookup+0x202/0x590 fs/namei.c:2783
 vfs_statx+0xff/0x3f0 fs/stat.c:353
 vfs_fstatat+0x7b/0xf0 fs/stat.c:375
 __do_sys_newfstatat+0x9d/0x120 fs/stat.c:542
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0x570 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60e21fcb0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffc01980478 EFLAGS: 00000202 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00005612f9d12851 RCX: 00007f60e21fcb0a
RDX: 00007ffc01980480 RSI: 00007ffc01980510 RDI: 00000000ffffff9c
RBP: 00005612f9cf6720 R08: 00005612f9d12851 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000202 R12: 00005612f9cf6810
R13: 00007ffc01980510 R14: 00005612dd3abca4 R15: 00005612dd3abbcc
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:284
Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 48 89 f0 48 89 f2 0f b6 6b ff 4c 8d 66 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 2c 41 3a 6c 24 ff 74 ae 19 c0
RSP: 0018:ffffc900001a89d8 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff878ea501 RCX: ffffffff8ed6c4a8
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff878ea500
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000000
R10: ffff888109fd4020 R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 000000000000012b R15: ffffffff8ed335b8
FS:  00007f60e20a4880(0000) GS:ffff888268a6a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005612f9cee3e0 CR3: 0000000120e8e000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
   0:	fa                   	cli
   1:	48 c1 e8 03          	shr    $0x3,%rax
   5:	83 e2 07             	and    $0x7,%edx
   8:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
   d:	38 d0                	cmp    %dl,%al
   f:	7f 04                	jg     0x15
  11:	84 c0                	test   %al,%al
  13:	75 58                	jne    0x6d
  15:	48 89 f0             	mov    %rsi,%rax
  18:	48 89 f2             	mov    %rsi,%rdx
  1b:	0f b6 6b ff          	movzbl -0x1(%rbx),%ebp
  1f:	4c 8d 66 01          	lea    0x1(%rsi),%r12
  23:	48 c1 e8 03          	shr    $0x3,%rax
  27:	83 e2 07             	and    $0x7,%edx
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	38 d0                	cmp    %dl,%al
  31:	7f 04                	jg     0x37
  33:	84 c0                	test   %al,%al
  35:	75 2c                	jne    0x63
  37:	41 3a 6c 24 ff       	cmp    -0x1(%r12),%bpl
  3c:	74 ae                	je     0xffffffec
  3e:	19 c0                	sbb    %eax,%eax