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* [syzbot] [udf?] WARNING in udf_rename
@ 2022-12-22  7:31 syzbot
  0 siblings, 0 replies; only message in thread
From: syzbot @ 2022-12-22  7:31 UTC (permalink / raw)
  To: jack, linux-kernel, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    e45fb347b630 Add linux-next specific files for 20221220
git tree:       linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=101f5464480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8ae91cba504b4da8
dashboard link: https://syzkaller.appspot.com/bug?extid=932c11aa5a73e344a857
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=116bc780480000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12aa9b94480000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1ae2b280f860/disk-e45fb347.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/253fc221144a/vmlinux-e45fb347.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e2695a52406f/bzImage-e45fb347.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/0ec2a53bda86/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+932c11aa5a73e344a857@syzkaller.appspotmail.com

memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5073 'syz-executor109'
loop0: detected capacity change from 0 to 2048
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5073 at fs/udf/namei.c:802 udf_rename+0x914/0xb60 fs/udf/namei.c:802
Modules linked in:
CPU: 1 PID: 5073 Comm: syz-executor109 Not tainted 6.1.0-next-20221220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:udf_rename+0x914/0xb60 fs/udf/namei.c:802
Code: 48 89 da 48 8b 7c 24 58 e8 89 c5 ff ff 31 ff 89 c3 89 c6 e8 3e 38 a2 fe 85 db 0f 84 5d fa ff ff e9 c9 fd ff ff e8 7c 3b a2 fe <0f> 0b 48 8b 7c 24 30 bb 8b ff ff ff e8 8b 58 01 00 e9 ae fd ff ff
RSP: 0018:ffffc900039df5d0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888022559d40 RSI: ffffffff82df1964 RDI: 0000000000000005
RBP: ffffc900039dfbe8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888073571490 R14: ffffc900039df660 R15: ffff888073571af8
FS:  0000555556037300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 000000002a4df000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_rename+0x1162/0x1a90 fs/namei.c:4779
 do_renameat2+0xb22/0xc30 fs/namei.c:4930
 __do_sys_rename fs/namei.c:4976 [inline]
 __se_sys_rename fs/namei.c:4974 [inline]
 __x64_sys_rename+0x81/0xa0 fs/namei.c:4974
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4a792ed819
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd557425e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f4a792ed819
RDX: 00007f4a792ed819 RSI: 0000000020000400 RDI: 00000000200003c0
RBP: 00007f4a792ad0b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000bea R11: 0000000000000246 R12: 00007f4a792ad140
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>


---
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syzbot can test patches for this issue, for details see:
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