From: Paul Moore <paul@paul-moore.com>
To: syzbot <syzbot+521772a90166b3fca21f@syzkaller.appspotmail.com>
Cc: davem@davemloft.net, dsahern@kernel.org, kuba@kernel.org,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, netdev@vger.kernel.org,
syzkaller-bugs@googlegroups.com, yoshfuji@linux-ipv6.org
Subject: Re: KASAN: use-after-free Write in cipso_v4_doi_putdef
Date: Wed, 3 Mar 2021 11:20:45 -0500 [thread overview]
Message-ID: <CAHC9VhT5DJzk9MVRHJtO7kR1RVkGW+WRx8xt_xGS01H3HLm3RA@mail.gmail.com> (raw)
In-Reply-To: <000000000000f022ff05bca3d9a3@google.com>
On Wed, Mar 3, 2021 at 10:53 AM syzbot
<syzbot+521772a90166b3fca21f@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 7a7fd0de Merge branch 'kmap-conversion-for-5.12' of git://..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=164a74dad00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=779a2568b654c1c6
> dashboard link: https://syzkaller.appspot.com/bug?extid=521772a90166b3fca21f
> compiler: Debian clang version 11.0.1-2
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+521772a90166b3fca21f@syzkaller.appspotmail.com
>
> ==================================================================
> BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
> BUG: KASAN: use-after-free in atomic_fetch_sub_release include/asm-generic/atomic-instrumented.h:220 [inline]
> BUG: KASAN: use-after-free in __refcount_sub_and_test include/linux/refcount.h:272 [inline]
> BUG: KASAN: use-after-free in __refcount_dec_and_test include/linux/refcount.h:315 [inline]
> BUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:333 [inline]
> BUG: KASAN: use-after-free in cipso_v4_doi_putdef+0x2d/0x190 net/ipv4/cipso_ipv4.c:586
> Write of size 4 at addr ffff8880179ecb18 by task syz-executor.5/20110
Almost surely the same problem as the others, I'm currently chasing
down a few remaining spots to make sure the fix I'm working on is
correct.
--
paul moore
www.paul-moore.com
next prev parent reply other threads:[~2021-03-03 19:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-03 15:53 KASAN: use-after-free Write in cipso_v4_doi_putdef syzbot
2021-03-03 16:20 ` Paul Moore [this message]
2021-03-03 22:55 ` Paul Moore
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