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

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Date:   Sat, 23 May 2020 23:03:03 -0700
From:   syzbot <syzbot+0ce97ea45b008ba3b8bd@...kaller.appspotmail.com>
To:     arnd@...db.de, daniel.baluta@....com, festevam@...il.com,
        gregkh@...uxfoundation.org, kernel@...gutronix.de,
        linux-arm-kernel@...ts.infradead.org, linux-imx@....com,
        linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux@...pel-privat.de, miquel.raynal@...tlin.com, richard@....at,
        s.hauer@...gutronix.de, shawnguo@...nel.org,
        syzkaller-bugs@...glegroups.com, vigneshr@...com
Subject: Re: KASAN: use-after-free Read in uif_close

syzbot has bisected this bug to:

commit 32ec783ae19d48084b893cc54747fed37b07eb0c
Author: Arnd Bergmann <arnd@...db.de>
Date:   Wed Apr 8 19:02:57 2020 +0000

    firmware: imx: fix compile-testing

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15b22972100000
start commit:   c11d28ab Add linux-next specific files for 20200522
git tree:       linux-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=17b22972100000
console output: https://syzkaller.appspot.com/x/log.txt?x=13b22972100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3f6dbdea4159fb66
dashboard link: https://syzkaller.appspot.com/bug?extid=0ce97ea45b008ba3b8bd
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14b23f06100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=111b0172100000

Reported-by: syzbot+0ce97ea45b008ba3b8bd@...kaller.appspotmail.com
Fixes: 32ec783ae19d ("firmware: imx: fix compile-testing")

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