linux-kernel - Re: KASAN: use-after-free Read in crypto_gcm_init

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Message-ID: <000000000000dd9f160596c1d465@google.com>
Date:   Thu, 07 Nov 2019 05:42:07 -0800
From:   syzbot <syzbot+e736399a2c4054612307@...kaller.appspotmail.com>
To:     Jason@...c4.com, ard.biesheuvel@...aro.org, aviadye@...lanox.com,
        borisp@...lanox.com, daniel@...earbox.net, davejwatson@...com,
        davem@...emloft.net, dhowells@...hat.com,
        dirk.vandermerwe@...ronome.com, ebiggers3@...il.com,
        herbert@...dor.apana.org.au, jakub.kicinski@...ronome.com,
        jason@...c4.com, john.fastabend@...il.com, k.marinushkin@...il.com,
        keescook@...omium.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        security@...nel.org, steffen.klassert@...unet.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in crypto_gcm_init_common

syzbot suspects this bug was fixed by commit:

commit 9354544cbccf68da1b047f8fb7b47630e3c8a59d
Author: Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
Date:   Mon Jun 24 04:26:58 2019 +0000

     net/tls: fix page double free on TX cleanup

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=168ad3c2600000
start commit:   4710e789 Merge tag 'nfs-for-4.20-2' of git://git.linux-nfs..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=9384ecb1c973baed
dashboard link: https://syzkaller.appspot.com/bug?extid=e736399a2c4054612307
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17902f5b400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=111377e5400000

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

#syz fix: net/tls: fix page double free on TX cleanup

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