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

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Message-ID: <000000000000de09e70599226583@google.com>
Date:   Sat, 07 Dec 2019 11:45:00 -0800
From:   syzbot <syzbot+1c9db6a163a4000d0765@...kaller.appspotmail.com>
To:     asmadeus@...ewreck.org, davem@...emloft.net,
        dominique.martinet@....fr, ericvh@...il.com, jiangyiwen@...ei.com,
        linux-kernel@...r.kernel.org, lucho@...kov.net,
        netdev@...r.kernel.org, rminnich@...dia.gov,
        syzkaller-bugs@...glegroups.com, tomasbortoli@...il.com,
        v9fs-developer@...ts.sourceforge.net, viro@...iv.linux.org.uk
Subject: Re: KASAN: use-after-free Read in __queue_work (2)

syzbot suspects this bug was fixed by commit:

commit 430ac66eb4c5b5c4eb846b78ebf65747510b30f1
Author: Tomas Bortoli <tomasbortoli@...il.com>
Date:   Fri Jul 20 09:27:30 2018 +0000

     net/9p/trans_fd.c: fix race-condition by flushing workqueue before the  
kfree()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15661282e00000
start commit:   ca04b3cc Merge tag 'armsoc-fixes' of git://git.kernel.org/..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=2ca6c7a31d407f86
dashboard link: https://syzkaller.appspot.com/bug?extid=1c9db6a163a4000d0765
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1473a452400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14087748400000

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

#syz fix: net/9p/trans_fd.c: fix race-condition by flushing workqueue  
before the kfree()

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