MIME-Version: 1.0
Date:   Fri, 17 Mar 2023 04:20:48 -0700
Message-ID: <000000000000e9e9ee05f716c445@google.com>
Subject: [syzbot] [udf?] WARNING in udf_new_block
From:   syzbot <syzbot+cc717c6c5fee9ed6e41d@syzkaller.appspotmail.com>
To:     jack@suse.com, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hello,

syzbot found the following issue on:

HEAD commit:    eeac8ede1755 Linux 6.3-rc2
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16e97a70c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=dbab9019ad6fc418
dashboard link: https://syzkaller.appspot.com/bug?extid=cc717c6c5fee9ed6e41d
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/204f10b1db6d/disk-eeac8ede.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c0ab57601df9/vmlinux-eeac8ede.xz
kernel image: https://storage.googleapis.com/syzbot-assets/21d53c00efd1/bzImage-eeac8ede.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cc717c6c5fee9ed6e41d@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 14411 at fs/udf/udfdecl.h:123 udf_add_free_space fs/udf/balloc.c:125 [inline]
WARNING: CPU: 1 PID: 14411 at fs/udf/udfdecl.h:123 udf_table_new_block fs/udf/balloc.c:667 [inline]
WARNING: CPU: 1 PID: 14411 at fs/udf/udfdecl.h:123 udf_new_block+0x1dc2/0x2130 fs/udf/balloc.c:733
Modules linked in:
CPU: 1 PID: 14411 Comm: syz-executor.0 Not tainted 6.3.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:udf_updated_lvid fs/udf/udfdecl.h:121 [inline]
RIP: 0010:udf_add_free_space fs/udf/balloc.c:125 [inline]
RIP: 0010:udf_table_new_block fs/udf/balloc.c:667 [inline]
RIP: 0010:udf_new_block+0x1dc2/0x2130 fs/udf/balloc.c:733
Code: fe e9 00 fd ff ff e8 ed 61 8d fe 48 8b bc 24 88 00 00 00 e8 60 82 b8 07 45 31 f6 48 8b 5c 24 78 e9 6d fd ff ff e8 ce 61 8d fe <0f> 0b e9 64 fc ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 7d e3 ff ff
RSP: 0018:ffffc9001688f580 EFLAGS: 00010287
RAX: ffffffff82fde5b2 RBX: 000000004c84c04c RCX: 0000000000040000
RDX: ffffc90012967000 RSI: 0000000000000938 RDI: 0000000000000939
RBP: ffffc9001688f7d0 R08: ffffffff82fde210 R09: fffffbfff1ca8066
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880489d301c R15: 0000000000000037
FS:  00007fe1f2f80700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002004c000 CR3: 000000001e4ed000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_new_inode+0x389/0xd10 fs/udf/ialloc.c:71
 udf_create+0x21/0xe0 fs/udf/namei.c:384
 lookup_open fs/namei.c:3416 [inline]
 open_last_lookups fs/namei.c:3484 [inline]
 path_openat+0x13df/0x3170 fs/namei.c:3712
 do_filp_open+0x234/0x490 fs/namei.c:3742
 do_sys_openat2+0x13f/0x500 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_open fs/open.c:1372 [inline]
 __se_sys_open fs/open.c:1368 [inline]
 __x64_sys_open+0x225/0x270 fs/open.c:1368
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe1f228c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe1f2f80168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fe1f23ac050 RCX: 00007fe1f228c0f9
RDX: 0000000000000048 RSI: 00000000000060c2 RDI: 0000000020000100
RBP: 00007fe1f22e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffec8d11ecf R14: 00007fe1f2f80300 R15: 0000000000022000
 </TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.