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[198.145.29.99]) by mx.google.com with ESMTPS id w16si1455499plp.329.2019.06.25.16.48.11 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 25 Jun 2019 16:48:11 -0700 (PDT) Received-SPF: pass (google.com: domain of ebiggers@kernel.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=YdV2OgLA; spf=pass (google.com: domain of ebiggers@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=ebiggers@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from gmail.com (unknown [104.132.1.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 905A92086D; Tue, 25 Jun 2019 23:48:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561506491; bh=IIPnw17DMud2IaI5vgEyfR+P3UuBx+ITkJ6rG4E0/Zw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=YdV2OgLAzb3QWIbIVBE+1Nl4jWGTlSEpUeKyjuhshQ5iyMDWHYzMnPwdXtw4XiTNM Qlxvmu3vya3XBKrFZhs2Es4bATlzE9X90mNaVtgT3Pb2Mf6AIFRrheD9lOiitAgGAM aOWIXSJfI4ZF3nZLsa28aqfknN+f2T7fsNojlPCM= Date: Tue, 25 Jun 2019 16:48:09 -0700 From: Eric Biggers To: John Fastabend Cc: syzbot , akpm@linux-foundation.org, ast@kernel.org, cai@lca.pw, crecklin@redhat.com, daniel@iogearbox.net, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, bpf@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: KASAN: slab-out-of-bounds Write in validate_chain Message-ID: <20190625234808.GB116876@gmail.com> References: <000000000000e672c6058bd7ee45@google.com> <0000000000007724d6058c2dfc24@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000007724d6058c2dfc24@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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: Hi John, On Tue, Jun 25, 2019 at 04:07:00PM -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit e9db4ef6bf4ca9894bb324c76e01b8f1a16b2650 > Author: John Fastabend > Date: Sat Jun 30 13:17:47 2018 +0000 > > bpf: sockhash fix omitted bucket lock in sock_close > Are you working on this? This is the 6th open syzbot report that has been bisected to this commit, and I suspect it's the cause of many of the other 30 open syzbot reports I assigned to the bpf subsystem too (https://lore.kernel.org/bpf/20190624050114.GA30702@sol.localdomain/). Also, this is happening in mainline (v5.2-rc6). - Eric