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: 14250 Comm: syz.4.2733 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: ffffed1004df3002 R12: ffffffff933b5080
R13: ffffffff961845e0 R14: 0000000000000000 R15: ffffffff93380340
FS: 00007f787c77f6c0(0000) GS:ffff888125d2b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006dc0 CR3: 0000000030c9c000 CR4: 00000000003526f0
Call Trace:
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 db ac 80 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 d3 ea 48 f6 65 8b 05 dc 18 48 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900157979a0 EFLAGS: 00000206
RAX: f6bc91d8c4fb8b00 RBX: 0000000000000a02 RCX: f6bc91d8c4fb8b00
RDX: 0000000000000000 RSI: ffffffff8d7f1156 RDI: 0000000000000001
RBP: ffffc90015797a30 R08: ffffffff8f9dba77 R09: 1ffffffff1f3b74e
R10: dffffc0000000000 R11: fffffbfff1f3b74f R12: dffffc0000000000
R13: ffff8880321f2e30 R14: ffffffff99c28c30 R15: 1ffff92002af2f34
__debug_check_no_obj_freed lib/debugobjects.c:1108 [inline]
debug_check_no_obj_freed+0x451/0x470 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2446 [inline]
slab_free mm/slub.c:6574 [inline]
kfree+0x115/0x6d0 mm/slub.c:6781
raw_ioctl+0x23fc/0x3c90 drivers/usb/gadget/legacy/raw_gadget.c:-1
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f787b98eacb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f787c77df70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007f787b98eacb
RDX: 00007f787c77dff0 RSI: 0000000040085507 RDI: 0000000000000006
RBP: 0000000000000006 R08: 00007f787bd10320 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000200000001240
R13: 000000000000000c R14: 00007f787bbe5fa0 R15: 00007ffce63d9e68
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: ffffed1004df3002 R12: ffffffff933b5080
R13: ffffffff961845e0 R14: 0000000000000000 R15: ffffffff93380340
FS: 00007f787c77f6c0(0000) GS:ffff888125d2b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006dc0 CR3: 0000000030c9c000 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