linux-kernel - Re: [syzbot] KASAN: slab-out-of-bounds Read in squashfs_get

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Message-ID: <000000000000e287c905bd4101dc@google.com>
Date:   Thu, 11 Mar 2021 03:23:05 -0800
From:   syzbot <syzbot+8e28bba73ed1772a6802@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, foxhlchen@...il.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        phillip@...ashfs.org.uk, syzkaller-bugs@...glegroups.com,
        torvalds@...ux-foundation.org
Subject: Re: [syzbot] KASAN: slab-out-of-bounds Read in squashfs_get_id

syzbot suspects this issue was fixed by commit:

commit e812cbbbbbb15adbbbee176baa1e8bda53059bf0
Author: Phillip Lougher <phillip@...ashfs.org.uk>
Date:   Tue Feb 9 21:41:50 2021 +0000

    squashfs: avoid out of bounds writes in decompressors

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11bfa48ad00000
start commit:   cd796ed3 Merge tag 'trace-v5.10-rc7' of git://git.kernel.o..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=59df2a4dced5f928
dashboard link: https://syzkaller.appspot.com/bug?extid=8e28bba73ed1772a6802
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1138f80f500000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=125e080f500000

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

#syz fix: squashfs: avoid out of bounds writes in decompressors

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