Oops: general protection fault, probably for non-canonical address 0xdffffc0000000060: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000300-0x0000000000000307]
CPU: 0 UID: 0 PID: 2855 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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:ffffc90000007a10 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87b04ec1 RCX: ffffffff8f0279c0
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87b04ec0
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88810dea0020 R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000f82 R15: ffffffff8eff4700
FS:  00007f014300f880(0000) GS:ffff8882686a9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c291cca10 CR3: 0000000117be2000 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+0x1b1/0x370 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
 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:1527 [inline]
 dummy_timer+0x121c/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:1989
 __run_hrtimer kernel/time/hrtimer.c:1930 [inline]
 __hrtimer_run_queues+0x470/0xa00 kernel/time/hrtimer.c:1994
 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2011
 handle_softirqs+0x1dd/0x9e0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:get_stack_pointer arch/x86/include/asm/stacktrace.h:95 [inline]
RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:62 [inline]
RIP: 0010:arch_stack_walk+0xcf/0xf0 arch/x86/kernel/stacktrace.c:24
Code: 00 48 89 c6 48 85 c0 75 d1 48 8b 45 d0 65 48 2b 05 3e d4 8f 0b 75 2e 48 83 c4 68 5b 41 5c 41 5d 41 5e 41 5f 5d e9 01 74 08 06 <65> 48 3b 15 31 d4 8f 0b 74 09 48 8b 8a 78 18 00 00 eb 83 48 89 e9
RSP: 0018:ffffc900015a7960 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900015a7960 RCX: 0000000000000000
RDX: ffff8881179dbb80 RSI: ffffc900015a7a20 RDI: ffffc900015a79c0
RBP: ffffc900015a79f0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffed1023a11460 R11: 0000000000000000 R12: ffffffff819d5410
R13: ffffc900015a7a20 R14: 0000000000000000 R15: ffff8881179dbb80
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x43/0x70 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6246 [inline]
 kmem_cache_free+0x108/0x660 mm/slub.c:6373
 free_filename fs/namei.c:147 [inline]
 putname+0xb1/0x110 fs/namei.c:306
 class_filename_destructor include/linux/fs.h:2553 [inline]
 class_filename_maybe_null_destructor include/linux/fs.h:2557 [inline]
 vfs_fstatat+0x86/0xe0 fs/stat.c:368
 __do_sys_newfstatat+0x9d/0x120 fs/stat.c:538
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0143167b0a
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:00007fff91cd9c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007fff91cda130 RCX: 00007f0143167b0a
RDX: 00007fff91cd9ca0 RSI: 00007fff91cda130 RDI: 00000000ffffff9c
RBP: 000055dbbd3712c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff91cd9d30
R13: 000055dba076d100 R14: 000055dbbd6405e0 R15: 00007fff91cda750
 </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:ffffc90000007a10 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87b04ec1 RCX: ffffffff8f0279c0
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87b04ec0
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88810dea0020 R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000f82 R15: ffffffff8eff4700
FS:  00007f014300f880(0000) GS:ffff8882686a9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c291cca10 CR3: 0000000117be2000 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