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Tue, 05 Dec 2023 10:38:25 -0800 (PST) Received: from localhost ([98.97.116.78]) by smtp.gmail.com with ESMTPSA id t9-20020a170902e84900b001cc131c65besm10574713plg.168.2023.12.05.10.38.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Dec 2023 10:38:25 -0800 (PST) Date: Tue, 05 Dec 2023 10:38:24 -0800 From: John Fastabend To: syzbot , andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, cong.wang@bytedance.com, daniel@iogearbox.net, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, nathan@kernel.org, ndesaulniers@google.com, netdev@vger.kernel.org, pabeni@redhat.com, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, trix@redhat.com, yhs@fb.com, yoshfuji@linux-ipv6.org Message-ID: <656f6e2050d_2df272086c@john.notmuch> In-Reply-To: <0000000000004f438d060bc6e988@google.com> References: <0000000000004f438d060bc6e988@google.com> Subject: RE: [syzbot] [net?] WARNING in tcp_recvmsg_locked (2) Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 8470e4368b0f Merge branch 'net-cacheline-optimizations' > git tree: net-next > console+strace: https://syzkaller.appspot.com/x/log.txt?x=12094286e80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f8715b6ede5c4b90 > dashboard link: https://syzkaller.appspot.com/bug?extid=06dbd397158ec0ea4983 > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1247bee2e80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1285243ce80000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/90007d08e178/disk-8470e436.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/b55270de1cdc/vmlinux-8470e436.xz > kernel image: https://storage.googleapis.com/syzbot-assets/2237d34b6fec/bzImage-8470e436.xz > > The issue was bisected to: > > commit 965b57b469a589d64d81b1688b38dcb537011bb0 > Author: Cong Wang > Date: Wed Jun 15 16:20:12 2022 +0000 > > net: Introduce a new proto_ops ->read_skb() > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1087c0d4e80000 > final oops: https://syzkaller.appspot.com/x/report.txt?x=1287c0d4e80000 > console output: https://syzkaller.appspot.com/x/log.txt?x=1487c0d4e80000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+06dbd397158ec0ea4983@syzkaller.appspotmail.com > Fixes: 965b57b469a5 ("net: Introduce a new proto_ops ->read_skb()") > > WARNING: CPU: 1 PID: 5130 at net/ipv4/tcp.c:2396 tcp_recvmsg_locked+0xa54/0x2490 net/ipv4/tcp.c:2396 I'll take a look. Thanks.