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: 9169 Comm: udevd Not tainted 6.16.0-rc7-syzkaller-g51d4b0a44c82 #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:ffffc900000079b8 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87691841 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87691840
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88811b3bc00b R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8e776d58
FS: 00007fdab3461880(0000) GS:ffff888269160000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f02d7386d58 CR3: 000000013690e000 CR4: 00000000003506f0
Call Trace:
count_matching_names kernel/locking/lockdep.c:881 [inline]
register_lock_class+0x26d/0x4c0 kernel/locking/lockdep.c:1347
__lock_acquire+0xa6/0x1c90 kernel/locking/lockdep.c:5115
lock_acquire kernel/locking/lockdep.c:5871 [inline]
lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
__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:20 [inline]
complete+0x1d/0x200 kernel/sched/completion.c:47
transfer drivers/usb/gadget/udc/dummy_hcd.c:1523 [inline]
dummy_timer+0x1c59/0x3a30 drivers/usb/gadget/udc/dummy_hcd.c:1979
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x1ff/0xad0 kernel/time/hrtimer.c:1825
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1842
handle_softirqs+0x208/0x8d0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch.isra.0+0x1e9/0x9e0 kernel/sched/core.c:5265
Code: 0f 85 5f 07 00 00 8b 0d 59 0f 2c 09 85 c9 0f 85 b9 02 00 00 48 89 df e8 25 ba e2 05 e8 b0 63 36 00 fb 65 48 8b 1d 4f 08 1d 0b <48> 8d bb 50 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9001286fa20 EFLAGS: 00000202
RAX: 00000000008c07d5 RBX: ffff88810d2f9d00 RCX: ffffffff81855a6f
RDX: 0000000000000000 RSI: ffffffff88b0654c RDI: ffffffff87690bc0
RBP: ffffc9001286fa60 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8a7af8d7 R11: 0000000000000001 R12: ffff888119515700
R13: 0000000000000000 R14: ffff8881f5838858 R15: ffff8881f5839398
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x132d/0x3b10 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
schedule_hrtimeout_range_clock+0x2dc/0x320 kernel/time/sleep_timeout.c:207
ep_poll fs/eventpoll.c:2114 [inline]
do_epoll_wait+0xdfd/0x1040 fs/eventpoll.c:2530
__do_sys_epoll_wait fs/eventpoll.c:2538 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2533 [inline]
__x64_sys_epoll_wait+0x194/0x290 fs/eventpoll.c:2533
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdab354f407
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:00007fff4ad2aa20 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 00007fdab3461880 RCX: 00007fdab354f407
RDX: 0000000000000004 RSI: 00007fff4ad2aab0 RDI: 0000000000000004
RBP: 00005639b51642c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000202 R12: 00005639b53aa2e0
R13: 00007fff4ad2aab0 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:ffffc900000079b8 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87691841 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87691840
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88811b3bc00b R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8e776d58
FS: 00007fdab3461880(0000) GS:ffff888269160000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f02d7386d58 CR3: 000000013690e000 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