[syzbot] WARNING in __udf_add_aext

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: aaa11ce2ffc8 Add linux-next specific files for 20220923
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16e609dc880000
kernel config: https://syzkaller.appspot.com/x/.config?x=186d1ff305f10294
dashboard link: https://syzkaller.appspot.com/bug?extid=0eaad3590d65102b9391
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, 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/95c7bf83c07e/disk-aaa11ce2.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b161cd56a7a3/vmlinux-aaa11ce2.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0eaad3...@syzkaller.appspotmail.com

WARNING: CPU: 0 PID: 6228 at fs/udf/inode.c:2017 __udf_add_aext+0x676/0x7d0 fs/udf/inode.c:2017
Modules linked in:
CPU: 0 PID: 6228 Comm: syz-executor.4 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:__udf_add_aext+0x676/0x7d0 fs/udf/inode.c:2017
Code: ef 0f 84 b3 fb ff ff e8 68 cc a7 fe 0f 0b e9 a7 fb ff ff e8 5c cc a7 fe 48 8b 44 24 20 48 05 b0 00 00 00 eb b7 e8 4a cc a7 fe <0f> 0b e9 27 fb ff ff e8 3e cc a7 fe 0f 0b e9 7d fb ff ff 41 bc fb
RSP: 0018:ffffc90012bff378 EFLAGS: 00010216
RAX: 000000000001e91e RBX: ffffc90012bff800 RCX: ffffc900060b1000
RDX: 0000000000040000 RSI: ffffffff82d4c7b6 RDI: 0000000000000006
RBP: ffff888090f987c0 R08: 0000000000000006 R09: 0000000000000000
R10: 00000000000001d0 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000001d0 R14: 0000000000000010 R15: 00000000000001e8
FS: 00007fec3be4a700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85afad6000 CR3: 0000000016e68000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
udf_setup_indirect_aext+0x576/0x880 fs/udf/inode.c:1983
udf_add_aext+0x208/0x2d0 fs/udf/inode.c:2070
udf_insert_aext fs/udf/inode.c:2236 [inline]
udf_update_extents fs/udf/inode.c:1190 [inline]
inode_getblk+0x22db/0x4010 fs/udf/inode.c:894
udf_get_block.part.0+0x1c7/0x4e0 fs/udf/inode.c:443
udf_get_block+0x36/0x210 fs/udf/inode.c:425
__block_write_begin_int+0x3b9/0x14b0 fs/buffer.c:1991
__block_write_begin fs/buffer.c:2041 [inline]
block_write_begin+0xb5/0x4d0 fs/buffer.c:2102
udf_write_begin+0x31/0xa0 fs/udf/inode.c:212
generic_perform_write+0x252/0x570 mm/filemap.c:3753
__generic_file_write_iter+0x2aa/0x4d0 mm/filemap.c:3881
udf_file_write_iter+0x2cc/0x650 fs/udf/file.c:170
call_write_iter include/linux/fs.h:2190 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x9e9/0xdd0 fs/read_write.c:578
ksys_write+0x127/0x250 fs/read_write.c:631
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fec3ac8a5a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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:00007fec3be4a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fec3adabf80 RCX: 00007fec3ac8a5a9
RDX: 000000006db6e559 RSI: 0000000020000ec0 RDI: 0000000000000003
RBP: 00007fec3ace5580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc019edef R14: 00007fec3be4a300 R15: 0000000000022000
</TASK>


---
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[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: aaa11ce2ffc8 Add linux-next specific files for 20220923
git tree: linux-next

console+strace: https://syzkaller.appspot.com/x/log.txt?x=10ba92a4880000

kernel config: https://syzkaller.appspot.com/x/.config?x=186d1ff305f10294
dashboard link: https://syzkaller.appspot.com/bug?extid=0eaad3590d65102b9391
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=114c4c0c880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1664e478880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/95c7bf83c07e/disk-aaa11ce2.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b161cd56a7a3/vmlinux-aaa11ce2.xz

mounted in repro: https://storage.googleapis.com/syzbot-assets/0aa83cf49b7b/mount_2.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0eaad3...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 3662 at fs/udf/inode.c:2017 __udf_add_aext+0x676/0x7d0 fs/udf/inode.c:2017
Modules linked in:
CPU: 0 PID: 3662 Comm: syz-executor182 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:__udf_add_aext+0x676/0x7d0 fs/udf/inode.c:2017
Code: ef 0f 84 b3 fb ff ff e8 68 cc a7 fe 0f 0b e9 a7 fb ff ff e8 5c cc a7 fe 48 8b 44 24 20 48 05 b0 00 00 00 eb b7 e8 4a cc a7 fe <0f> 0b e9 27 fb ff ff e8 3e cc a7 fe 0f 0b e9 7d fb ff ff 41 bc fb

RSP: 0018:ffffc90003d7f378 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc90003d7f800 RCX: 0000000000000000
RDX: ffff88801f218000 RSI: ffffffff82d4c7b6 RDI: 0000000000000006
RBP: ffff8880749ddb08 R08: 0000000000000006 R09: 0000000000000000

R10: 00000000000001d0 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000001d0 R14: 0000000000000010 R15: 00000000000001e8

FS: 0000555556794300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007fce22d305e0 CR3: 000000002276a000 CR4: 00000000003506e0

RIP: 0033:0x7fce22d5ba59
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc3f3136e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000020000080 RCX: 00007fce22d5ba59
RDX: 000000000000fea7 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc3f313710 R09: 00007ffc3f313710
R10: 00007ffc3f3135b0 R11: 0000000000000246 R12: 00007ffc3f31370c
R13: 00007ffc3f313740 R14: 00007ffc3f313720 R15: 0000000000000005
</TASK>