Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 3 UID: 0 PID: 5936 Comm: syz-executor316 Not tainted 6.14.0-rc6-syzkaller-00016-g0fed89a961ea #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:p9_client_walk+0x9a/0x530 net/9p/client.c:1165
Code: 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 3d 44 b0 f6 48 89 d8 31 f6 48 c1 e8 03 66 89 74 24 40 48 c7 44 24 50 00 00 00 00 <42> 80 3c 30 00 0f 85 3e 04 00 00 31 ff 89 ee 4c 8b 33 e8 0f 3f b0
RSP: 0018:ffffc9000380faa0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: ffff88802a9bc880 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000007 R09: fffffffffffff000
R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000701f56
FS: 000055558c345380(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f412d1932a9 CR3: 000000002107c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
clone_fid fs/9p/fid.h:23 [inline]
v9fs_fid_xattr_set+0x119/0x2d0 fs/9p/xattr.c:121
v9fs_set_acl+0xe6/0x150 fs/9p/acl.c:276
v9fs_set_create_acl+0x4b/0x70 fs/9p/acl.c:306
v9fs_vfs_mkdir_dotl+0x517/0x6e0 fs/9p/vfs_inode_dotl.c:411
vfs_mkdir+0x57d/0x860 fs/namei.c:4313
do_mkdirat+0x301/0x3a0 fs/namei.c:4336
__do_sys_mkdir fs/namei.c:4356 [inline]
__se_sys_mkdir fs/namei.c:4354 [inline]
__x64_sys_mkdir+0xef/0x140 fs/namei.c:4354
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: 0033:0x7fd26f335429
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:00007fff6d918e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00004000000000c0 RCX: 00007fd26f335429
RDX: 00007fd26f335429 RSI: 0000000000000040 RDI: 00004000000000c0
RBP: 0000000000000073 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff6d919008 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:p9_client_walk+0x9a/0x530 net/9p/client.c:1165
Code: 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 3d 44 b0 f6 48 89 d8 31 f6 48 c1 e8 03 66 89 74 24 40 48 c7 44 24 50 00 00 00 00 <42> 80 3c 30 00 0f 85 3e 04 00 00 31 ff 89 ee 4c 8b 33 e8 0f 3f b0
RSP: 0018:ffffc9000380faa0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: ffff88802a9bc880 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000007 R09: fffffffffffff000
R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000701f56
FS: 000055558c345380(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f412d1932a9 CR3: 000000002107c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 28 00 sub %al,(%rax)
2: 00 00 add %al,(%rax)
4: 48 89 84 24 88 00 00 mov %rax,0x88(%rsp)
b: 00
c: 31 c0 xor %eax,%eax
e: e8 3d 44 b0 f6 call 0xf6b04450
13: 48 89 d8 mov %rbx,%rax
16: 31 f6 xor %esi,%esi
18: 48 c1 e8 03 shr $0x3,%rax
1c: 66 89 74 24 40 mov %si,0x40(%rsp)
21: 48 c7 44 24 50 00 00 movq $0x0,0x50(%rsp)
28: 00 00
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 0f 85 3e 04 00 00 jne 0x473
35: 31 ff xor %edi,%edi
37: 89 ee mov %ebp,%esi
39: 4c 8b 33 mov (%rbx),%r14
3c: e8 .byte 0xe8
3d: 0f 3f (bad)
3f: b0 .byte 0xb0