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Fri, 08 Jun 2018 09:02:33 -0700 (PDT) Subject: Re: general protection fault in bpf_tcp_close To: Dmitry Vyukov , Daniel Borkmann Cc: syzbot , Alexei Starovoitov , LKML , netdev , syzkaller-bugs References: <00000000000098e65b056d184a11@google.com> <7257c52b-7632-e313-6e80-a4bc1f8a6bf0@iogearbox.net> From: John Fastabend Message-ID: <6de0b5d4-b29e-c089-2119-3236a506af42@gmail.com> Date: Fri, 8 Jun 2018 09:02:20 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/07/2018 09:58 AM, Dmitry Vyukov wrote: > On Mon, May 28, 2018 at 12:15 AM, Daniel Borkmann wrote: >> [ +John ] >> >> On 05/26/2018 11:13 AM, syzbot wrote: >>> Hello, >>> >>> syzbot found the following crash on: >>> >>> HEAD commit: fd0bfa8d6e04 Merge branch 'bpf-af-xdp-cleanups' >>> git tree: bpf-next >>> console output: https://syzkaller.appspot.com/x/log.txt?x=11da9427800000 >>> kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1 >>> dashboard link: https://syzkaller.appspot.com/bug?extid=0ce137753c78f7b6acc1 >>> compiler: gcc (GCC) 8.0.1 20180413 (experimental) >>> >>> Unfortunately, I don't have any reproducer for this crash yet. >>> >>> IMPORTANT: if you fix the bug, please add the following tag to the commit: >>> Reported-by: syzbot+0ce137753c78f7b6acc1@syzkaller.appspotmail.com >> >> Should be fixed by: https://patchwork.ozlabs.org/patch/920695/ > > #syz fix: bpf: sockhash fix race with bpf_tcp_close and map delete > Hi, actually that patch was dropped because it needed an update. I should have a new patch today/tomorrow though and will add the correct fix tag then. Thanks, John