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: 11886 Comm: syz.1.1759 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 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: 0000:ffffc9000445f908 EFLAGS: 00010046 RAX: 0000000000000060 RBX: ffffffff87898641 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87898640 RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001 R10: ffff88811f8e000b R11: 0000000000000001 R12: 0000000000000301 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8ea336a0 FS: 00007f716141f6c0(0000) GS:ffff888268ea0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7162d41000 CR3: 0000000134c34000 CR4: 00000000003506f0 Call Trace: count_matching_names kernel/locking/lockdep.c:878 [inline] register_lock_class+0x26d/0x4c0 kernel/locking/lockdep.c:1344 __lock_acquire+0xa6/0x1c90 kernel/locking/lockdep.c:5112 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 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+0x1c3e/0x3a00 drivers/usb/gadget/udc/dummy_hcd.c:1979 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1841 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1858 handle_softirqs+0x208/0x8d0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xfa/0x160 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+0x43/0xb0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0033:0x7f71629f1859 Code: ca 0f 44 f8 80 3d 1e 6d 1f 00 00 74 14 b8 e6 00 00 00 0f 05 f7 d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10 <89> 74 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 RSP: 002b:00007f716141df60 EFLAGS: 00000206 RAX: 00000000fffffffa RBX: 0000000000000010 RCX: 0000000000000000 RDX: 00007f716141dfa0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 00007f7162d40320 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000500 R13: 000000000000000c R14: 00007f7162c15fa0 R15: 00007ffebf66b1f8 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: 0000:ffffc9000445f908 EFLAGS: 00010046 RAX: 0000000000000060 RBX: ffffffff87898641 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87898640 RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001 R10: ffff88811f8e000b R11: 0000000000000001 R12: 0000000000000301 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8ea336a0 FS: 00007f716141f6c0(0000) GS:ffff888268ea0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7162d41000 CR3: 0000000134c34000 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