Re: [syzbot] [gfs2?] WARNING in chown_common

[syzbot <syzbot+04c2672c56fbb9401640@syzkaller.appspotmail.com>]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in notify_change

After security_path_chown: owner=ffff88801c36c900
notify_change START: inode=ffff8880411c5620, owner=ffff88801c36c900
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5846 at fs/attr.c:428 notify_change+0xc5e/0xef0 fs/attr.c:428
Modules linked in:
CPU: 0 UID: 0 PID: 5846 Comm: syz.0.20 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:notify_change+0xc5e/0xef0 fs/attr.c:428
Code: ff e8 26 41 ff 00 48 8b 93 e0 00 00 00 48 c7 c7 20 ae 79 8b 48 89 de 44 89 f1 e8 3d 5f ff ff e9 e5 fe ff ff e8 93 00 98 00 90 <0f> 0b 90 e9 b0 f4 ff ff 44 89 e9 80 e1 07 fe c1 38 c1 0f 8c 34 f4
RSP: 0018:ffffc9000cfbfba8 EFLAGS: 00010293
RAX: ffffffff812832dd RBX: 0000000000000046 RCX: ffff88801c36c900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff8880411c56ff R09: 1ffff11008238adf
R10: dffffc0000000000 R11: ffffed1008238ae0 R12: ffff88800043eeb0
R13: ffff8880411c5620 R14: 0000000000000000 R15: ffff8880411c5700
FS:  00007f1d976436c0(0000) GS:ffff88808d730000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1d968a6e60 CR3: 000000004de5d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 chown_common+0x44a/0x700 fs/open.c:793
 do_fchownat+0x161/0x270 fs/open.c:834
 __do_sys_fchownat fs/open.c:849 [inline]
 __se_sys_fchownat fs/open.c:846 [inline]
 __x64_sys_fchownat+0xb5/0xd0 fs/open.c:846
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d9678efc9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1d97643038 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 00007f1d969e6090 RCX: 00007f1d9678efc9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007f1d96811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d969e6128 R14: 00007f1d969e6090 R15: 00007ffc482e6f78
 </TASK>


Tested on:

commit:         439fc29d Merge tag 'drm-fixes-2025-11-09' of https://g..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1679517c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=929790bc044e87d7
dashboard link: https://syzkaller.appspot.com/bug?extid=04c2672c56fbb9401640
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=17309412580000