Oops: general protection fault, probably for non-canonical address 0xdffffc0000000040: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000200-0x0000000000000207]
CPU: 1 UID: 0 PID: 16083 Comm: udevd Not tainted 6.12.0-rc1-syzkaller-00028-gd73dc7b182be #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:266
Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 0f b6 6b ff 4c 8d 66 01 48 89 f0 48 89 f2 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: 0018:ffffc900001b8858 EFLAGS: 00010046
RAX: 0000000000000040 RBX: ffffffff8746f901 RCX: ffffffff8fb0cdc0
RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff8746f900
RBP: 0000000000000066 R08: 0000000000000001 R09: dffffc0000000000
R10: ffffffff8fb0cdd0 R11: ffffffff8fb0cdc0 R12: 0000000000000201
R13: dffffc0000000000 R14: 0000000000000c29 R15: ffffffff934a9980
FS: 00007fda91529c80(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5dddaa1000 CR3: 0000000128fce000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
count_matching_names kernel/locking/lockdep.c:875 [inline]
register_lock_class+0x63b/0x1240 kernel/locking/lockdep.c:1340
__lock_acquire+0x135/0x3ce0 kernel/locking/lockdep.c:5077
lock_acquire.part.0+0x11b/0x380 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:20 [inline]
complete+0x1d/0x200 kernel/sched/completion.c:47
transfer drivers/usb/gadget/udc/dummy_hcd.c:1518 [inline]
dummy_timer+0x1aaf/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1972
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1755
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1772
handle_softirqs+0x206/0x8d0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xac/0x110 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:ktime_get_coarse_real_ts64+0x6/0x200 kernel/time/timekeeping.c:2385
Code: c7 40 cd ee 88 e8 7a 11 21 01 e9 36 fe ff ff 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <48> 8d 57 08 48 b8 00 00 00 00 00 fc ff df 41 56 49 89 fe 41 55 49
RSP: 0018:ffffc90001adf938 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff88811227d3e0 RCX: ffffffff82633355
RDX: ffff888131c59d40 RSI: ffffffff81bcf1b8 RDI: ffffc90001adf978
RBP: ffffc90001adf9d0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff9200035bf2b
R13: dffffc0000000000 R14: ffff88811227d410 R15: 0000000000200000
current_time fs/inode.c:2646 [inline]
inode_set_ctime_current+0x84/0x140 fs/inode.c:2660
shmem_truncate_range mm/shmem.c:1145 [inline]
shmem_evict_inode+0x39b/0xb90 mm/shmem.c:1272
evict+0x409/0x970 fs/inode.c:723
iput_final fs/inode.c:1875 [inline]
iput fs/inode.c:1901 [inline]
iput+0x530/0x890 fs/inode.c:1887
dentry_unlink_inode+0x29c/0x480 fs/dcache.c:412
__dentry_kill+0x1d0/0x600 fs/dcache.c:615
dput.part.0+0x4b1/0x9b0 fs/dcache.c:857
dput+0x1f/0x30 fs/dcache.c:847
do_renameat2+0x8c8/0xe90 fs/namei.c:5172
__do_sys_rename fs/namei.c:5217 [inline]
__se_sys_rename fs/namei.c:5215 [inline]
__x64_sys_rename+0x7d/0xa0 fs/namei.c:5215
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fda915d893b
Code: 48 8b 15 f0 64 15 00 83 c8 ff 64 83 3a 15 75 0e 48 8b 7c 24 08 e8 d5 d4 07 00 f7 d8 19 c0 48 83 c4 18 c3 b8 52 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 be 64 15 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffe723a1fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 000055de2f305101 RCX: 00007fda915d893b
RDX: 000055db0e9edc0d RSI: 00007ffe723a1fd8 RDI: 00007ffe723a23d8
RBP: 000055de5380d640 R08: 0000000000000006 R09: b1a686dbe5452241
R10: 000000000000010f R11: 0000000000000206 R12: 000055de5379d040
R13: 00007ffe723a1fd8 R14: 00007ffe723a23d8 R15: 000055de2f2efec8
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:266
Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 0f b6 6b ff 4c 8d 66 01 48 89 f0 48 89 f2 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: 0018:ffffc900001b8858 EFLAGS: 00010046
RAX: 0000000000000040 RBX: ffffffff8746f901 RCX: ffffffff8fb0cdc0
RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff8746f900
RBP: 0000000000000066 R08: 0000000000000001 R09: dffffc0000000000
R10: ffffffff8fb0cdd0 R11: ffffffff8fb0cdc0 R12: 0000000000000201
R13: dffffc0000000000 R14: 0000000000000c29 R15: ffffffff934a9980
FS: 00007fda91529c80(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5dddaa1000 CR3: 0000000128fce000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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: 0f b6 6b ff movzbl -0x1(%rbx),%ebp
19: 4c 8d 66 01 lea 0x1(%rsi),%r12
1d: 48 89 f0 mov %rsi,%rax
20: 48 89 f2 mov %rsi,%rdx
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