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

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Message-ID: <67f3098e.050a0220.0a13.0276.GAE@google.com>
Date: Sun, 06 Apr 2025 16:09:02 -0700
From: syzbot <syzbot+09b7d050e4806540153d@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, andrii@...nel.org, ast@...nel.org, 
	eddyz87@...il.com, hdanton@...a.com, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, shakeel.butt@...ux.dev, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [fs?] BUG: unable to handle kernel NULL pointer
 dereference in filemap_read_folio (4)

syzbot has bisected this issue to:

commit ad41251c290dfe3c01472c94d2439a59de23fe97
Author: Andrii Nakryiko <andrii@...nel.org>
Date:   Thu Aug 29 17:42:28 2024 +0000

    lib/buildid: implement sleepable build_id_parse() API

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1601923f980000
start commit:   a2cc6ff5ec8f Merge tag 'firewire-updates-6.15' of git://gi..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1501923f980000
console output: https://syzkaller.appspot.com/x/log.txt?x=1101923f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6fe3b5e6a2cb1cc2
dashboard link: https://syzkaller.appspot.com/bug?extid=09b7d050e4806540153d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15743998580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10143404580000

Reported-by: syzbot+09b7d050e4806540153d@...kaller.appspotmail.com
Fixes: ad41251c290d ("lib/buildid: implement sleepable build_id_parse() API")

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