linux-kernel - Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in filemap_map

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Message-ID: <690c811b.050a0220.3d0d33.014d.GAE@google.com>
Date: Thu, 06 Nov 2025 03:06:03 -0800
From: syzbot <syzbot+14d047423f40dc1dac89@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, chandan.babu@...cle.com, david@...hat.com, 
	hdanton@...a.com, jgg@...pe.ca, jhubbard@...dia.com, kas@...nel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, linux-xfs@...r.kernel.org, peterx@...hat.com, 
	syzkaller-bugs@...glegroups.com, willy@...radead.org
Subject: Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in filemap_map_pages

syzbot suspects this issue was fixed by commit:

commit 357b92761d942432c90aeeb965f9eb0c94466921
Author: Kiryl Shutsemau <kas@...nel.org>
Date:   Tue Sep 23 11:07:10 2025 +0000

    mm/filemap: map entire large folio faultaround

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12658532580000
start commit:   b19a97d57c15 Merge tag 'pull-fixes' of git://git.kernel.or..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=292f3bc9f654adeb
dashboard link: https://syzkaller.appspot.com/bug?extid=14d047423f40dc1dac89
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12399442580000

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

#syz fix: mm/filemap: map entire large folio faultaround

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