Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 382 Comm: syz.2.17 Not tainted syzkaller #0 a14c28d9e62c02dc866229d1d178db2aa7df2752
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__d_entry_type include/linux/dcache.h:414 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:419 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:465 [inline]
RIP: 0010:atomic_open fs/namei.c:3479 [inline]
RIP: 0010:lookup_open fs/namei.c:3574 [inline]
RIP: 0010:open_last_lookups fs/namei.c:3702 [inline]
RIP: 0010:path_openat+0x1553/0x34f0 fs/namei.c:3938
Code: f3 ff ff ff 44 8b 6c 24 24 4c 89 e7 e8 36 b0 02 00 4c 63 e3 e9 9d f5 ff ff e8 e9 f2 99 ff 4c 8b 74 24 30 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 8f 0e 00 00 41 8b 1c 24 be 00 00 70 00
RSP: 0018:ffffc90001aff9c0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888113f272c8 RCX: ffff888108b0a600
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888110f0ac30
RBP: ffffc90001affbd0 R08: ffff8881f6e50bc7 R09: 1ffff1103edca178
R10: dffffc0000000000 R11: ffffed103edca179 R12: 0000000000000008
R13: 0000000000000000 R14: ffff888108b0aef8 R15: dffffc0000000000
FS: 00007f0542f9f6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0542f7ed58 CR3: 0000000115b78000 CR4: 00000000003526b0
Call Trace:
<TASK>
do_filp_open+0x1f5/0x440 fs/namei.c:3968
do_sys_openat2+0x134/0x1d0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1466
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f054219bf79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0542f9f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f0542415fa0 RCX: 00007f054219bf79
RDX: 0000000000040000 RSI: 0000200000000140 RDI: ffffffffffffff9c
RBP: 00007f05422327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0542416038 R14: 00007f0542415fa0 R15: 00007fff374d71c8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:414 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:419 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:465 [inline]
RIP: 0010:atomic_open fs/namei.c:3479 [inline]
RIP: 0010:lookup_open fs/namei.c:3574 [inline]
RIP: 0010:open_last_lookups fs/namei.c:3702 [inline]
RIP: 0010:path_openat+0x1553/0x34f0 fs/namei.c:3938
Code: f3 ff ff ff 44 8b 6c 24 24 4c 89 e7 e8 36 b0 02 00 4c 63 e3 e9 9d f5 ff ff e8 e9 f2 99 ff 4c 8b 74 24 30 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 8f 0e 00 00 41 8b 1c 24 be 00 00 70 00
RSP: 0018:ffffc90001aff9c0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888113f272c8 RCX: ffff888108b0a600
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888110f0ac30
RBP: ffffc90001affbd0 R08: ffff8881f6e50bc7 R09: 1ffff1103edca178
R10: dffffc0000000000 R11: ffffed103edca179 R12: 0000000000000008
R13: 0000000000000000 R14: ffff888108b0aef8 R15: dffffc0000000000
FS: 00007f0542f9f6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0542f7ed58 CR3: 0000000115b78000 CR4: 00000000003526b0
----------------
Code disassembly (best guess), 3 bytes skipped:
0: ff 44 8b 6c incl 0x6c(%rbx,%rcx,4)
4: 24 24 and $0x24,%al
6: 4c 89 e7 mov %r12,%rdi
9: e8 36 b0 02 00 call 0x2b044
e: 4c 63 e3 movslq %ebx,%r12
11: e9 9d f5 ff ff jmp 0xfffff5b3
16: e8 e9 f2 99 ff call 0xff99f304
1b: 4c 8b 74 24 30 mov 0x30(%rsp),%r14
20: 4c 89 e0 mov %r12,%rax
23: 48 c1 e8 03 shr $0x3,%rax
* 27: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction
2c: 84 c0 test %al,%al
2e: 0f 85 8f 0e 00 00 jne 0xec3
34: 41 8b 1c 24 mov (%r12),%ebx
38: be 00 00 70 00 mov $0x700000,%esi