linux-kernel - Re: [syzbot] [fs?] KASAN: use-after-free Read in kill

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Message-ID: <000000000000ac777e05f6081529@google.com>
Date:   Fri, 03 Mar 2023 16:24:27 -0800
From:   syzbot <syzbot+382c8824777dca2812fe@...kaller.appspotmail.com>
To:     chuck.lever@...cle.com, frederic@...nel.org, hdanton@...a.com,
        jlayton@...nel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, mingo@...nel.org,
        peterz@...radead.org, rafael.j.wysocki@...el.com,
        syzkaller-bugs@...glegroups.com, tony@...mide.com,
        ulf.hansson@...aro.org, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [fs?] KASAN: use-after-free Read in kill_fasync

syzbot suspects this issue was fixed by commit:

commit 69d4c0d3218692ffa56b0e1b9c76c50c699d7044
Author: Peter Zijlstra <peterz@...radead.org>
Date:   Thu Jan 12 19:43:58 2023 +0000

    entry, kasan, x86: Disallow overriding mem*() functions

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17adfae4c80000
start commit:   972a278fe60c Merge tag 'for-5.19-rc7-tag' of git://git.ker..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=3cc990589d31f8d6
dashboard link: https://syzkaller.appspot.com/bug?extid=382c8824777dca2812fe
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=141c2dac080000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1590cfa4080000

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

#syz fix: entry, kasan, x86: Disallow overriding mem*() functions

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