linux-kernel - Re: [syzbot] [overlayfs?] BUG: unable to handle kernel NULL pointer dereference in __lookup

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Message-ID: <677ee31c.050a0220.25a300.01a2.GAE@google.com>
Date: Wed, 08 Jan 2025 12:42:04 -0800
From: syzbot <syzbot+94891a5155abdf6821b7@...kaller.appspotmail.com>
To: aivazian.tigran@...il.com, amir73il@...il.com, andrew.kanner@...il.com, 
	kovalev@...linux.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-unionfs@...r.kernel.org, 
	miklos@...redi.hu, stable@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [overlayfs?] BUG: unable to handle kernel NULL pointer
 dereference in __lookup_slow (3)

syzbot suspects this issue was fixed by commit:

commit c8b359dddb418c60df1a69beea01d1b3322bfe83
Author: Vasiliy Kovalev <kovalev@...linux.org>
Date:   Tue Nov 19 15:58:17 2024 +0000

    ovl: Filter invalid inodes with missing lookup function

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14ef4dc4580000
start commit:   20371ba12063 Merge tag 'drm-fixes-2024-08-30' of https://g..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=d806687521800cad
dashboard link: https://syzkaller.appspot.com/bug?extid=94891a5155abdf6821b7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1673fcb7980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15223467980000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: ovl: Filter invalid inodes with missing lookup function

For information about bisection process see: https://goo.gl/tpsmEJ#bisection