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Wed, 23 Jun 2021 09:28:42 -0700 (PDT) Received: from localhost.localdomain ([94.103.225.155]) by smtp.gmail.com with ESMTPSA id c5sm40897lfv.117.2021.06.23.09.28.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Jun 2021 09:28:42 -0700 (PDT) Date: Wed, 23 Jun 2021 19:28:37 +0300 From: Pavel Skripkin To: syzbot Cc: akpm@linux-foundation.org, coreteam@netfilter.org, davem@davemloft.net, dsahern@kernel.org, fw@strlen.de, kadlec@netfilter.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, yoshfuji@linux-ipv6.org Subject: Re: [syzbot] WARNING: zero-size vmalloc in corrupted Message-ID: <20210623192837.13792eae@gmail.com> In-Reply-To: <20210623191928.69d279d1@gmail.com> References: <000000000000aa23a205c56b587d@google.com> <20210623191928.69d279d1@gmail.com> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-suse-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 3D5A72001093 Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=GZ5qMCQU; spf=pass (imf18.hostedemail.com: domain of paskripkin@gmail.com designates 209.85.167.52 as permitted sender) smtp.mailfrom=paskripkin@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Stat-Signature: gfq3e33pbqy4c1ju5n5xiom6q1t8g49q X-HE-Tag: 1624465724-510459 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 23 Jun 2021 19:19:28 +0300 Pavel Skripkin wrote: > On Wed, 23 Jun 2021 02:15:23 -0700 > syzbot wrote: > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 13311e74 Linux 5.13-rc7 > > git tree: upstream > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=15d01e58300000 kernel > > config: https://syzkaller.appspot.com/x/.config?x=42ecca11b759d96c > > dashboard link: > > https://syzkaller.appspot.com/bug?extid=c2f6f09fe907a838effb syz > > repro: > > https://syzkaller.appspot.com/x/repro.syz?x=14bb89e8300000 C > > reproducer: > > https://syzkaller.appspot.com/x/repro.c?x=17cc51b8300000 > > > > The issue was bisected to: > > > > commit f9006acc8dfe59e25aa75729728ac57a8d84fc32 > > Author: Florian Westphal > > Date: Wed Apr 21 07:51:08 2021 +0000 > > > > netfilter: arp_tables: pass table pointer via nf_hook_ops > > > > bisection log: > > https://syzkaller.appspot.com/x/bisect.txt?x=13b88400300000 final > > oops: > > https://syzkaller.appspot.com/x/report.txt?x=10788400300000 console > > output: https://syzkaller.appspot.com/x/log.txt?x=17b88400300000 > > > > This one is similar to previous zero-size vmalloc, I guess :) > > #syz test > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > > Hah, I didn't notice that this one is already fixed by me. But the patch is in the media tree, it's not upstreamed yet: https://git.linuxtv.org/media_tree.git/commit/?id=c680ed46e418e9c785d76cf44eb33bfd1e8cf3f6 So, #syz dup: WARNING: zero-size vmalloc in dvb_dmx_init With regards, Pavel Skripkin