[syzbot] [ext4?] WARNING in ext4_xattr_block_set (3)

[syzbot <syzbot+4c9d23743a2409b80293@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    46a51f4f5eda Merge tag 'for-v6.17-rc' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1709747c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f5b21423ca3f0a96
dashboard link: https://syzkaller.appspot.com/bug?extid=4c9d23743a2409b80293
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1089747c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=100fcf62580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/230712d5bcfe/disk-46a51f4f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c02b11d16746/vmlinux-46a51f4f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c1526fd71bea/bzImage-46a51f4f.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/c8e39bedb73d/mount_0.gz
  fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=17b2fb12580000)

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4c9d23743a2409b80293@syzkaller.appspotmail.com

loop0: detected capacity change from 0 to 512
EXT4-fs (loop0): orphan cleanup on readonly fs
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6102 at fs/ext4/xattr.c:1906 ext4_xattr_block_set+0x25b5/0x2ac0 fs/ext4/xattr.c:1906
Modules linked in:
CPU: 1 UID: 0 PID: 6102 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:ext4_xattr_block_set+0x25b5/0x2ac0 fs/ext4/xattr.c:1906
Code: 00 00 00 e8 dd 71 a2 ff f0 80 63 28 fd eb 28 e8 71 34 43 ff 31 db 48 c7 44 24 20 00 00 00 00 e9 88 f1 ff ff e8 5c 34 43 ff 90 <0f> 0b 90 e9 0e dc ff ff e8 4e 34 43 ff 48 8b 5c 24 10 4c 8b 74 24
RSP: 0018:ffffc90003e77220 EFLAGS: 00010293
RAX: ffffffff827b39b4 RBX: ffffc90003e77548 RCX: ffff88802e9a8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003e77408 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88805487c400 R11: ffff88805487c000 R12: 0000000000000000
R13: 1ffff920007ceeaa R14: 1ffff920007ceea9 R15: ffffc90003e77550
FS:  000055556e470500(0000) GS:ffff8881269bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005624941c2138 CR3: 000000004081c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline]
 ext4_expand_extra_isize_ea+0x12d5/0x1ea0 fs/ext4/xattr.c:2822
 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6385
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6428 [inline]
 __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6506
 ext4_evict_inode+0x80d/0xee0 fs/ext4/inode.c:254
 evict+0x504/0x9c0 fs/inode.c:810
 ext4_orphan_cleanup+0xc20/0x1460 fs/ext4/orphan.c:474
 __ext4_fill_super fs/ext4/super.c:5609 [inline]
 ext4_fill_super+0x57fa/0x60b0 fs/ext4/super.c:5728
 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4324
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f976e92034a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc3b5e27e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc3b5e2870 RCX: 00007f976e92034a
RDX: 0000200000000180 RSI: 00002000000001c0 RDI: 00007ffc3b5e2830
RBP: 0000200000000180 R08: 00007ffc3b5e2870 R09: 000000000080078b
R10: 000000000080078b R11: 0000000000000246 R12: 00002000000001c0
R13: 00007ffc3b5e2830 R14: 0000000000000473 R15: 0000200000000680
 </TASK>


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