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: 5557 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: ffffffff8ed6d5d8
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff878ea500
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000000
R10: ffff888109fa4020 R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000e24 R15: ffffffff8ed31d80
FS: 00007fd991166880(0000) GS:ffff888268a6a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f069cb12000 CR3: 0000000124d2e000 CR4: 00000000003506f0
Call Trace:
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:finish_task_switch.isra.0+0x160/0x700 kernel/sched/core.c:5118
Code: 8d 7b 18 31 f6 e8 20 d0 0a 00 31 f6 48 89 df e8 d6 f9 ff ff 48 89 df e8 1e d3 d2 05 e8 09 be 35 00 fb 49 8d bc 24 40 15 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 5a
RSP: 0018:ffffc90012327a70 EFLAGS: 00000202
RAX: 00000000001f4a3d RBX: ffff8881f57390c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff88dec92b RDI: ffff88811be21540
RBP: ffffc90012327ab8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88811be20000
R13: ffff888114cc9d40 R14: 0000000000000000 R15: 0000000000002001
context_switch kernel/sched/core.c:5263 [inline]
__schedule+0xeb8/0x3e50 kernel/sched/core.c:6867
__schedule_loop kernel/sched/core.c:6949 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:6964
schedule_hrtimeout_range_clock+0x2d8/0x320 kernel/time/sleep_timeout.c:207
ep_poll fs/eventpoll.c:2028 [inline]
do_epoll_wait+0xdc3/0x1020 fs/eventpoll.c:2461
__do_sys_epoll_wait fs/eventpoll.c:2469 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2464 [inline]
__x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2464
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: 0033:0x7fd991254407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffdf2b430f0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007fd991166880 RCX: 00007fd991254407
RDX: 0000000000000004 RSI: 00007ffdf2b43180 RDI: 0000000000000004
RBP: 00005587f06332c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 00005587f0875640
R13: 00007ffdf2b43180 R14: 0000000000000000 R15: 0000000000000000
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: ffffffff8ed6d5d8
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff878ea500
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000000
R10: ffff888109fa4020 R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000e24 R15: ffffffff8ed31d80
FS: 00007fd991166880(0000) GS:ffff888268a6a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f069cb12000 CR3: 0000000124d2e000 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