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: 29463 Comm: syz.0.6788 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: ffffffff8bc0df00
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1006156002 R12: ffffffff933b5c98
R13: ffffffff96181e70 R14: 0000000000000000 R15: ffffffff93381340
FS: 0000555578acb500(0000) GS:ffff888125d2a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f914c4a6fe8 CR3: 00000000ac74c000 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:check_kcov_mode kernel/kcov.c:194 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x37/0x90 kernel/kcov.c:314
Code: 08 60 8f 92 65 8b 0d c8 27 cf 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 7c 16 00 00 00 74 52 8b 8a 58 16 00 00 <83> f9 03 75 47 48 8b 8a 60 16 00 00 44 8b 8a 5c 16 00 00 49 c1 e1
RSP: 0018:ffffc9000d2bf458 EFLAGS: 00000246
RAX: ffffffff8b3e2eb3 RBX: ffffffff8c9597a1 RCX: 0000000000000000
RDX: ffff88802c87bc80 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000d2bf650 R08: ffff88802c87bc80 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001
R13: 00002a3bd0cf8000 R14: 00007f91497f7fff R15: ffff8880774ae100
mt_slot lib/maple_tree.c:734 [inline]
mas_slot lib/maple_tree.c:767 [inline]
mas_get_slot lib/maple_tree.c:6630 [inline]
mas_validate_gaps lib/maple_tree.c:6898 [inline]
mt_validate+0x24a3/0x4390 lib/maple_tree.c:7174
validate_mm+0xae/0x4a0 mm/vma.c:651
mmap_region+0x15ab/0x2110 mm/vma.c:2746
do_mmap+0xc45/0x10d0 mm/mmap.c:558
vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:581
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: 0033:0x7f914b58ef03
Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 a8 ff ff ff 64 c7
RSP: 002b:00007ffd5727e148 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f9149ff76c0 RCX: 00007f914b58ef03
RDX: 0000000000000000 RSI: 0000000000021000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000020022 R11: 0000000000000246 R12: 00007ffd5727e2a0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
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: ffffffff8bc0df00
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1006156002 R12: ffffffff933b5c98
R13: ffffffff96181e70 R14: 0000000000000000 R15: ffffffff93381340
FS: 0000555578acb500(0000) GS:ffff888125d2a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f914c4a6fe8 CR3: 00000000ac74c000 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