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: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284
Code: 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 33 42 0f b6 0c 36 40 38 cd 75 48 49 ff c6 40
RSP: 0018:ffffc90000007700 EFLAGS: 00010006
RAX: 0000000000000300 RBX: dffffc0000000000 RCX: 0000000000000060
RDX: 0000000000000001 RSI: 0000000000000300 RDI: ffffffff8bc0d800
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed10048b6802 R12: ffffffff933b4400
R13: ffffffff96182098 R14: 0000000000000000 R15: ffffffff93380340
FS: 0000000000000000(0000) GS:ffff888125d2b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1dd8518750 CR3: 0000000078662000 CR4: 00000000003526f0
Call Trace:
<IRQ>
count_matching_names+0x57/0x90 kernel/locking/lockdep.c:878
register_lock_class+0x23f/0x320 kernel/locking/lockdep.c:1344
__lock_acquire+0x99/0xd20 kernel/locking/lockdep.c:5112
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
complete_with_flags kernel/sched/completion.c:25 [inline]
complete+0x28/0x1b0 kernel/sched/completion.c:52
transfer drivers/usb/gadget/udc/dummy_hcd.c:1523 [inline]
dummy_timer+0x214f/0x44c0 drivers/usb/gadget/udc/dummy_hcd.c:1979
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1841
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1858
handle_softirqs+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5193
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 ef fb b5 09 e8 aa a9 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 58 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffffff8de07af8 EFLAGS: 00000282
RAX: 3132a480b5f71400 RBX: 0000000000000000 RCX: 3132a480b5f71400
RDX: 0000000000000000 RSI: ffffffff8d7f1156 RDI: ffffffff8bc0d160
RBP: ffffffff8de07b50 R08: ffffffff8f9dba77 R09: 1ffffffff1f3b74e
R10: dffffc0000000000 R11: fffffbfff1f3b74f R12: ffffffff8de95200
R13: dffffc0000000000 R14: ffff888030a18000 R15: ffff8880b863abd8
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x17a0/0x4cc0 kernel/sched/core.c:6929
schedule_idle+0x52/0x90 kernel/sched/core.c:7052
do_idle+0x4a7/0x510 kernel/sched/idle.c:358
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
rest_init+0x2de/0x300 init/main.c:757
start_kernel+0x3ae/0x410 init/main.c:1111
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x147
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284
Code: 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 33 42 0f b6 0c 36 40 38 cd 75 48 49 ff c6 40
RSP: 0018:ffffc90000007700 EFLAGS: 00010006
RAX: 0000000000000300 RBX: dffffc0000000000 RCX: 0000000000000060
RDX: 0000000000000001 RSI: 0000000000000300 RDI: ffffffff8bc0d800
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed10048b6802 R12: ffffffff933b4400
R13: ffffffff96182098 R14: 0000000000000000 R15: ffffffff93380340
FS: 0000000000000000(0000) GS:ffff888125d2b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1dd8518750 CR3: 0000000078662000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 45 31 f6 xor %r14d,%r14d
3: 4a 8d 04 37 lea (%rdi,%r14,1),%rax
7: 48 89 c1 mov %rax,%rcx
a: 48 c1 e9 03 shr $0x3,%rcx
e: 0f b6 0c 19 movzbl (%rcx,%rbx,1),%ecx
12: 84 c9 test %cl,%cl
14: 75 2c jne 0x42
16: 42 0f b6 2c 37 movzbl (%rdi,%r14,1),%ebp
1b: 4a 8d 04 36 lea (%rsi,%r14,1),%rax
1f: 48 89 c1 mov %rax,%rcx
22: 48 c1 e9 03 shr $0x3,%rcx
* 26: 0f b6 0c 19 movzbl (%rcx,%rbx,1),%ecx <-- trapping instruction
2a: 84 c9 test %cl,%cl
2c: 75 33 jne 0x61
2e: 42 0f b6 0c 36 movzbl (%rsi,%r14,1),%ecx
33: 40 38 cd cmp %cl,%bpl
36: 75 48 jne 0x80
38: 49 ff c6 inc %r14
3b: 40 rex