linux-kernel - Re: KASAN: invalid-free in io_sqe_files

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Date:   Sun, 10 Nov 2019 03:49:01 -0800
From:   syzbot <syzbot+3254bc44113ae1e331ee@...kaller.appspotmail.com>
To:     axboe@...nel.dk, io-uring@...r.kernel.org,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: Re: KASAN: invalid-free in io_sqe_files_unregister

syzbot has bisected this bug to:

commit 65e19f54d29cd8559ce60cfd0d751bef7afbdc5c
Author: Jens Axboe <axboe@...nel.dk>
Date:   Sat Oct 26 13:20:21 2019 +0000

     io_uring: support for larger fixed file sets

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=154f483ce00000
start commit:   5591cf00 Add linux-next specific files for 20191108
git tree:       linux-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=174f483ce00000
console output: https://syzkaller.appspot.com/x/log.txt?x=134f483ce00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e1036c6ef52866f9
dashboard link: https://syzkaller.appspot.com/bug?extid=3254bc44113ae1e331ee
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=116bb33ae00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=173f133ae00000

Reported-by: syzbot+3254bc44113ae1e331ee@...kaller.appspotmail.com
Fixes: 65e19f54d29c ("io_uring: support for larger fixed file sets")

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