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: 20667 Comm: syz.0.3519 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:ffffc900000079c0 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87898641 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87898640
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88812d93800b R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8ea38a38
FS: 00007f85b1d376c0(0000) GS:ffff888268ea0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85b32b2a60 CR3: 0000000134382000 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+0x90/0xb0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_is_held_type+0x107/0x150 kernel/locking/lockdep.c:5945
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 ac 8d 53 05 83 f8 01 75 2d 9c 58 f6 c4 02 75 43 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f e9 d7 ac 02 00 45 31 ed eb
RSP: 0000:ffffc9000174fa50 EFLAGS: 00000296
RAX: 0000000000000046 RBX: ffff88812ece8b48 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff88c684b8 RDI: ffffffff878979c0
RBP: ffff88812067e388 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88812ece8000
R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000005
lock_is_held include/linux/lockdep.h:249 [inline]
xa_entry include/linux/xarray.h:1226 [inline]
xas_next_entry+0x29d/0x3c0 include/linux/xarray.h:1731
next_uptodate_folio+0x29/0x4a0 mm/filemap.c:3639
filemap_map_pages+0x571/0x1790 mm/filemap.c:3856
do_fault_around mm/memory.c:5656 [inline]
do_read_fault mm/memory.c:5689 [inline]
do_fault mm/memory.c:5832 [inline]
do_pte_missing mm/memory.c:4361 [inline]
handle_pte_fault mm/memory.c:6177 [inline]
__handle_mm_fault+0x1fa9/0x32a0 mm/memory.c:6318
handle_mm_fault+0x589/0xd10 mm/memory.c:6487
do_user_addr_fault+0x613/0x1240 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f85b32b2a60
Code: Unable to access opcode bytes at 0x7f85b32b2a36.
RSP: 002b:00007f85b1d34f68 EFLAGS: 00010202
RAX: 000000000000000b RBX: 0000000000000003 RCX: 0000000000000001
RDX: 0000000000000080 RSI: 00007f85b1d34fb0 RDI: 00007f85b1d36060
RBP: 00007f85b1d35fe0 R08: 000000000000000b R09: 00007f85b1d34d07
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 00007f85b1d34fb0 R14: 0000200000000080 R15: 00007f85b3650320
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:ffffc900000079c0 EFLAGS: 00010046
RAX: 0000000000000060 RBX: ffffffff87898641 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000300 RDI: ffffffff87898640
RBP: 0000000000000026 R08: 0000000000000001 R09: 0000000000000001
R10: ffff88812d93800b R11: 0000000000000001 R12: 0000000000000301
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8ea38a38
FS: 00007f85b1d376c0(0000) GS:ffff888268ea0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85b32b2a36 CR3: 0000000134382000 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