general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 296 Comm: syz-executor325 Not tainted 6.1.68-syzkaller-00029-g8c0f9174731d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:vfs_link+0x40/0x7f0 fs/namei.c:4485
Code: 89 cd 49 89 d6 48 89 75 c0 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 8f cd ac ff 48 89 5d a0 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 71 8a f3 ff 48 8b 03 48 89 45 d0
RSP: 0018:ffffc90000e67ba8 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff888108dfd100
RDX: 0000000000000000 RSI: ffffffff86cf9fe0 RDI: 0000000000000000
RBP: ffffc90000e67c10 R08: 0000000000000000 R09: ffffed10200ab3d6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88811f508770 R14: ffff888100559e00 R15: ffff888100559e00
FS: 00005555573cd480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 000000011ebc1000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
incfs_link fs/incfs/vfs.c:611 [inline]
dir_link+0x347/0x4c0 fs/incfs/vfs.c:1286
vfs_link+0x645/0x7f0 fs/namei.c:4529
do_linkat+0x34d/0x9f0 fs/namei.c:4600
__do_sys_linkat fs/namei.c:4628 [inline]
__se_sys_linkat fs/namei.c:4625 [inline]
__x64_sys_linkat+0xe9/0x100 fs/namei.c:4625
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6c1c515c69
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffec8eda488 EFLAGS: 00000246 ORIG_RAX: 0000000000000109
RAX: ffffffffffffffda RBX: 00007ffec8eda490 RCX: 00007f6c1c515c69
RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007ffec8eda498 R08: 0000000000000000 R09: 00007f6c1c4e5be0
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffec8eda6f8 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vfs_link+0x40/0x7f0 fs/namei.c:4485
Code: 89 cd 49 89 d6 48 89 75 c0 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 8f cd ac ff 48 89 5d a0 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 71 8a f3 ff 48 8b 03 48 89 45 d0
RSP: 0018:ffffc90000e67ba8 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff888108dfd100
RDX: 0000000000000000 RSI: ffffffff86cf9fe0 RDI: 0000000000000000
RBP: ffffc90000e67c10 R08: 0000000000000000 R09: ffffed10200ab3d6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88811f508770 R14: ffff888100559e00 R15: ffff888100559e00
FS: 00005555573cd480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 000000011ebc1000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 cd mov %ecx,%ebp
2: 49 89 d6 mov %rdx,%r14
5: 48 89 75 c0 mov %rsi,-0x40(%rbp)
9: 48 89 fb mov %rdi,%rbx
c: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12
13: fc ff df
16: e8 8f cd ac ff call 0xffaccdaa
1b: 48 89 5d a0 mov %rbx,-0x60(%rbp)
1f: 48 83 c3 30 add $0x30,%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 71 8a f3 ff call 0xfff38aaa
39: 48 8b 03 mov (%rbx),%rax
3c: 48 89 45 d0 mov %rax,-0x30(%rbp)