[syzbot] [ocfs2?] kernel BUG in ocfs2_xattr_value_truncate (3)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: f2ec6312bf71 Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12cb5789580000
kernel config: https://syzkaller.appspot.com/x/.config?x=20c9876b0f77b546
dashboard link: https://syzkaller.appspot.com/bug?extid=1542b94cc3d81b71110d
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

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

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f2ec6312.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/89734a3b39bd/vmlinux-f2ec6312.xz
kernel image: https://storage.googleapis.com/syzbot-assets/48a3e1cd63f9/bzImage-f2ec6312.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1542b9...@syzkaller.appspotmail.com

loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
and is ignored by this kernel. Remove the mand
option from the mount to silence this warning.
=======================================================
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
(syz.0.0,5327,0):ocfs2_dio_end_io:2420 ERROR: Direct IO failed, bytes = -28
------------[ cut here ]------------
kernel BUG at fs/ocfs2/xattr.c:747!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:ocfs2_xattr_extend_allocation fs/ocfs2/xattr.c:747 [inline]
RIP: 0010:ocfs2_xattr_value_truncate+0x1738/0x1740 fs/ocfs2/xattr.c:868
Code: 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c be eb ff ff 4c 89 f7 48 89 f3 e8 d6 44 3d fe 48 89 de e9 ab eb ff ff e8 c9 19 ce fd 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000f78e940 EFLAGS: 00010283
RAX: ffffffff83f86807 RBX: 0000000000000002 RCX: 0000000000100000
RDX: ffffc9000ee51000 RSI: 0000000000001097 RDI: 0000000000001098
RBP: ffffc9000f78ec70 R08: ffff888000ec2540 R09: 0000000000000006
R10: 00000000fffffffc R11: 0000000000000002 R12: fffff52001ef1d3c
R13: 0000000000000002 R14: 00000000fffffff5 R15: ffff88805486a5d0
FS: 00007f4b34b836c0(0000) GS:ffff88808c549000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 0000000040786000 CR4: 0000000000352ef0
Call Trace:
<TASK>
ocfs2_xa_value_truncate+0x2d6/0x420 fs/ocfs2/xattr.c:1956
ocfs2_xa_prepare_entry fs/ocfs2/xattr.c:2215 [inline]
ocfs2_xa_set+0x23dd/0x2ef0 fs/ocfs2/xattr.c:2293
ocfs2_xattr_block_set+0x3d2/0x3330 fs/ocfs2/xattr.c:3029
__ocfs2_xattr_set_handle+0x6b2/0xf40 fs/ocfs2/xattr.c:3431
ocfs2_xattr_set+0xf20/0x13a0 fs/ocfs2/xattr.c:3694
__vfs_setxattr+0x442/0x480 fs/xattr.c:223
__vfs_setxattr_noperm+0x12a/0x660 fs/xattr.c:257
vfs_setxattr+0x163/0x360 fs/xattr.c:344
do_setxattr fs/xattr.c:662 [inline]
filename_setxattr+0x296/0x630 fs/xattr.c:690
path_setxattrat+0x408/0x450 fs/xattr.c:734
__do_sys_lsetxattr fs/xattr.c:775 [inline]
__se_sys_lsetxattr fs/xattr.c:771 [inline]
__x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:771
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4b33d9de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4b34b82fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f4b34025fa0 RCX: 00007f4b33d9de99
RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000200000000100
RBP: 00007f4b33e33eaf R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b34026038 R14: 00007f4b34025fa0 R15: 00007ffd4526fe68
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_xattr_extend_allocation fs/ocfs2/xattr.c:747 [inline]
RIP: 0010:ocfs2_xattr_value_truncate+0x1738/0x1740 fs/ocfs2/xattr.c:868
Code: 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c be eb ff ff 4c 89 f7 48 89 f3 e8 d6 44 3d fe 48 89 de e9 ab eb ff ff e8 c9 19 ce fd 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000f78e940 EFLAGS: 00010283
RAX: ffffffff83f86807 RBX: 0000000000000002 RCX: 0000000000100000
RDX: ffffc9000ee51000 RSI: 0000000000001097 RDI: 0000000000001098
RBP: ffffc9000f78ec70 R08: ffff888000ec2540 R09: 0000000000000006
R10: 00000000fffffffc R11: 0000000000000002 R12: fffff52001ef1d3c
R13: 0000000000000002 R14: 00000000fffffff5 R15: ffff88805486a5d0
FS: 00007f4b34b836c0(0000) GS:ffff88808c549000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001480 CR3: 0000000040786000 CR4: 0000000000352ef0


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