From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BF4B5C38BFF for ; Mon, 24 Feb 2020 22:43:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 88EE22176D for ; Mon, 24 Feb 2020 22:43:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="PYCq0ynf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728584AbgBXWnn (ORCPT ); Mon, 24 Feb 2020 17:43:43 -0500 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:48606 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728583AbgBXWnk (ORCPT ); Mon, 24 Feb 2020 17:43:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582584218; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+oclofHchw/GDHhS/ehFkqV0QdXivh6ncK51lEL/8AU=; b=PYCq0ynf6ygmC8xtwT9ceffeGa64uK+tzrtUaNGC107xKi+rBmDaukre9XeVwhaPsKjydN 8ZbDXDf2hj/H+sxzqr9+x+BG1MDrBQcRQIxoD14+bkjKA1vepP9KP0R00U2k5IYVbuUs7Y JrGCWOtIFQmlcvVoCrItB54CHyi6w4M= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-127-GpfJUv9pOg-tSLx_ZMzHLA-1; Mon, 24 Feb 2020 17:43:35 -0500 X-MC-Unique: GpfJUv9pOg-tSLx_ZMzHLA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1A5F618C8C01; Mon, 24 Feb 2020 22:43:32 +0000 (UTC) Received: from ovpn-121-250.rdu2.redhat.com (ovpn-121-250.rdu2.redhat.com [10.10.121.250]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9F3009078A; Mon, 24 Feb 2020 22:43:27 +0000 (UTC) Message-ID: <17916d0509978e14d9a5e9eb52d760fa57460542.camel@redhat.com> Subject: Re: kernel panic: audit: backlog limit exceeded From: Eric Paris To: Paul Moore , syzbot Cc: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, dan.carpenter@oracle.com, davem@davemloft.net, fzago@cray.com, gregkh@linuxfoundation.org, john.hammond@intel.com, linux-audit@redhat.com, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com Date: Mon, 24 Feb 2020 17:43:27 -0500 In-Reply-To: References: <0000000000003cbb40059f4e0346@google.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.4 (3.34.4-1.fc31) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org https://syzkaller.appspot.com/x/repro.syz?x=151b1109e00000 (the reproducer listed) looks like it is literally fuzzing the AUDIT_SET. Which seems like this is working as designed if it is setting the failure mode to 2. On Mon, 2020-02-24 at 17:38 -0500, Paul Moore wrote: > On Mon, Feb 24, 2020 at 3:18 AM syzbot > wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 36a44bcd Merge branch 'bnxt_en-shutdown-and-kexec- > > kdump-re.. > > git tree: net > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=148bfdd9e00000 > > kernel config: > > https://syzkaller.appspot.com/x/.config?x=768cc3d3e277cc16 > > dashboard link: > > https://syzkaller.appspot.com/bug?extid=9a5e789e4725b9ef1316 > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > syz repro: > > https://syzkaller.appspot.com/x/repro.syz?x=151b1109e00000 > > C reproducer: > > https://syzkaller.appspot.com/x/repro.c?x=128bfdd9e00000 > > > > The bug was bisected to: > > > > commit 0c1b9970ddd4cc41002321c3877e7f91aacb896d > > Author: Dan Carpenter > > Date: Fri Jul 28 14:42:27 2017 +0000 > > > > staging: lustre: lustre: Off by two in lmv_fid2path() > > > > bisection log: > > https://syzkaller.appspot.com/x/bisect.txt?x=17e6c3e9e00000 > > final crash: > > https://syzkaller.appspot.com/x/report.txt?x=1416c3e9e00000 > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=1016c3e9e00000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the > > commit: > > Reported-by: syzbot+9a5e789e4725b9ef1316@syzkaller.appspotmail.com > > Fixes: 0c1b9970ddd4 ("staging: lustre: lustre: Off by two in > > lmv_fid2path()") > > > > audit: audit_backlog=13 > audit_backlog_limit=7 > > audit: audit_lost=1 audit_rate_limit=0 audit_backlog_limit=7 > > Kernel panic - not syncing: audit: backlog limit exceeded > > CPU: 1 PID: 9913 Comm: syz-executor024 Not tainted 5.6.0-rc1- > > syzkaller #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, > > BIOS Google 01/01/2011 > > Call Trace: > > __dump_stack lib/dump_stack.c:77 [inline] > > dump_stack+0x197/0x210 lib/dump_stack.c:118 > > panic+0x2e3/0x75c kernel/panic.c:221 > > audit_panic.cold+0x32/0x32 kernel/audit.c:307 > > audit_log_lost kernel/audit.c:377 [inline] > > audit_log_lost+0x8b/0x180 kernel/audit.c:349 > > audit_log_start kernel/audit.c:1788 [inline] > > audit_log_start+0x70e/0x7c0 kernel/audit.c:1745 > > audit_log+0x95/0x120 kernel/audit.c:2345 > > xt_replace_table+0x61d/0x830 net/netfilter/x_tables.c:1413 > > __do_replace+0x1da/0x950 net/ipv6/netfilter/ip6_tables.c:1084 > > do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline] > > do_ip6t_set_ctl+0x33a/0x4c8 net/ipv6/netfilter/ip6_tables.c:1681 > > nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] > > nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 > > ipv6_setsockopt net/ipv6/ipv6_sockglue.c:949 [inline] > > ipv6_setsockopt+0x147/0x180 net/ipv6/ipv6_sockglue.c:933 > > tcp_setsockopt net/ipv4/tcp.c:3165 [inline] > > tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3159 > > sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 > > __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 > > __do_sys_setsockopt net/socket.c:2146 [inline] > > __se_sys_setsockopt net/socket.c:2143 [inline] > > __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 > > do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 > > entry_SYSCALL_64_after_hwframe+0x49/0xbe > > RIP: 0033:0x44720a > > Code: 49 89 ca b8 37 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 1a e0 > > fb ff c3 66 0f 1f 84 00 00 00 00 00 49 89 ca b8 36 00 00 00 0f 05 > > <48> 3d 01 f0 ff ff 0f 83 fa df fb ff c3 66 0f 1f 84 00 00 00 00 00 > > RSP: 002b:00007ffd032dec78 EFLAGS: 00000286 ORIG_RAX: > > 0000000000000036 > > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044720a > > RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 > > RBP: 00007ffd032deda0 R08: 00000000000003b8 R09: 0000000000004000 > > R10: 00000000006d7b40 R11: 0000000000000286 R12: 00007ffd032deca0 > > R13: 00000000006d9d60 R14: 0000000000000029 R15: 00000000006d7ba0 > > Kernel Offset: disabled > > Rebooting in 86400 seconds.. > > > > > > --- > > This bug is generated by a bot. It may contain errors. > > See https://goo.gl/tpsmEJ for more information about syzbot. > > syzbot engineers can be reached at syzkaller@googlegroups.com. > > > > syzbot will keep track of this bug report. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > For information about bisection process see: > > https://goo.gl/tpsmEJ#bisection > > syzbot can test patches for this bug, for details see: > > https://goo.gl/tpsmEJ#testing-patches > > Similar to syzbot report 72461ac44b36c98f58e5, see my comments there. > From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Paris Subject: Re: kernel panic: audit: backlog limit exceeded Date: Mon, 24 Feb 2020 17:43:27 -0500 Message-ID: <17916d0509978e14d9a5e9eb52d760fa57460542.camel@redhat.com> References: <0000000000003cbb40059f4e0346@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-audit-bounces@redhat.com Errors-To: linux-audit-bounces@redhat.com To: Paul Moore , syzbot Cc: mareklindner@neomailbox.ch, sw@simonwunderlich.de, gregkh@linuxfoundation.org, a@unstable.cc, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, b.a.t.m.a.n@diktynna.open-mesh.org, linux-audit@redhat.com, netdev@vger.kernel.org, john.hammond@intel.com, fzago@cray.com, davem@davemloft.net, dan.carpenter@oracle.com List-Id: linux-audit@redhat.com https://syzkaller.appspot.com/x/repro.syz?x=151b1109e00000 (the reproducer listed) looks like it is literally fuzzing the AUDIT_SET. Which seems like this is working as designed if it is setting the failure mode to 2. On Mon, 2020-02-24 at 17:38 -0500, Paul Moore wrote: > On Mon, Feb 24, 2020 at 3:18 AM syzbot > wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 36a44bcd Merge branch 'bnxt_en-shutdown-and-kexec- > > kdump-re.. > > git tree: net > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=148bfdd9e00000 > > kernel config: > > https://syzkaller.appspot.com/x/.config?x=768cc3d3e277cc16 > > dashboard link: > > https://syzkaller.appspot.com/bug?extid=9a5e789e4725b9ef1316 > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > syz repro: > > https://syzkaller.appspot.com/x/repro.syz?x=151b1109e00000 > > C reproducer: > > https://syzkaller.appspot.com/x/repro.c?x=128bfdd9e00000 > > > > The bug was bisected to: > > > > commit 0c1b9970ddd4cc41002321c3877e7f91aacb896d > > Author: Dan Carpenter > > Date: Fri Jul 28 14:42:27 2017 +0000 > > > > staging: lustre: lustre: Off by two in lmv_fid2path() > > > > bisection log: > > https://syzkaller.appspot.com/x/bisect.txt?x=17e6c3e9e00000 > > final crash: > > https://syzkaller.appspot.com/x/report.txt?x=1416c3e9e00000 > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=1016c3e9e00000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the > > commit: > > Reported-by: syzbot+9a5e789e4725b9ef1316@syzkaller.appspotmail.com > > Fixes: 0c1b9970ddd4 ("staging: lustre: lustre: Off by two in > > lmv_fid2path()") > > > > audit: audit_backlog=13 > audit_backlog_limit=7 > > audit: audit_lost=1 audit_rate_limit=0 audit_backlog_limit=7 > > Kernel panic - not syncing: audit: backlog limit exceeded > > CPU: 1 PID: 9913 Comm: syz-executor024 Not tainted 5.6.0-rc1- > > syzkaller #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, > > BIOS Google 01/01/2011 > > Call Trace: > > __dump_stack lib/dump_stack.c:77 [inline] > > dump_stack+0x197/0x210 lib/dump_stack.c:118 > > panic+0x2e3/0x75c kernel/panic.c:221 > > audit_panic.cold+0x32/0x32 kernel/audit.c:307 > > audit_log_lost kernel/audit.c:377 [inline] > > audit_log_lost+0x8b/0x180 kernel/audit.c:349 > > audit_log_start kernel/audit.c:1788 [inline] > > audit_log_start+0x70e/0x7c0 kernel/audit.c:1745 > > audit_log+0x95/0x120 kernel/audit.c:2345 > > xt_replace_table+0x61d/0x830 net/netfilter/x_tables.c:1413 > > __do_replace+0x1da/0x950 net/ipv6/netfilter/ip6_tables.c:1084 > > do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline] > > do_ip6t_set_ctl+0x33a/0x4c8 net/ipv6/netfilter/ip6_tables.c:1681 > > nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] > > nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 > > ipv6_setsockopt net/ipv6/ipv6_sockglue.c:949 [inline] > > ipv6_setsockopt+0x147/0x180 net/ipv6/ipv6_sockglue.c:933 > > tcp_setsockopt net/ipv4/tcp.c:3165 [inline] > > tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3159 > > sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 > > __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 > > __do_sys_setsockopt net/socket.c:2146 [inline] > > __se_sys_setsockopt net/socket.c:2143 [inline] > > __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 > > do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 > > entry_SYSCALL_64_after_hwframe+0x49/0xbe > > RIP: 0033:0x44720a > > Code: 49 89 ca b8 37 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 1a e0 > > fb ff c3 66 0f 1f 84 00 00 00 00 00 49 89 ca b8 36 00 00 00 0f 05 > > <48> 3d 01 f0 ff ff 0f 83 fa df fb ff c3 66 0f 1f 84 00 00 00 00 00 > > RSP: 002b:00007ffd032dec78 EFLAGS: 00000286 ORIG_RAX: > > 0000000000000036 > > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044720a > > RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 > > RBP: 00007ffd032deda0 R08: 00000000000003b8 R09: 0000000000004000 > > R10: 00000000006d7b40 R11: 0000000000000286 R12: 00007ffd032deca0 > > R13: 00000000006d9d60 R14: 0000000000000029 R15: 00000000006d7ba0 > > Kernel Offset: disabled > > Rebooting in 86400 seconds.. > > > > > > --- > > This bug is generated by a bot. It may contain errors. > > See https://goo.gl/tpsmEJ for more information about syzbot. > > syzbot engineers can be reached at syzkaller@googlegroups.com. > > > > syzbot will keep track of this bug report. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > For information about bisection process see: > > https://goo.gl/tpsmEJ#bisection > > syzbot can test patches for this bug, for details see: > > https://goo.gl/tpsmEJ#testing-patches > > Similar to syzbot report 72461ac44b36c98f58e5, see my comments there. > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05B8FC38BFF for ; Mon, 24 Feb 2020 22:43:43 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AD92820732 for ; Mon, 24 Feb 2020 22:43:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="doLmm6RH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AD92820732 Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linux-audit-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582584221; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=qOmt9EGvEBg7miJW3bJGxjMTNx/uv6L4L9cqEqpS2T8=; b=doLmm6RHobnz6WqKWQsBbZHDFuxK2Vzu2tYCO/S0s9GqGWCCwNS/luzcaSWdxZBvmWARI5 5VY+RS5dgAl/5NJyUnjQOTZahyaTTh542PHzcTh6NonKZz9e13KHIGeREXuNjjw3RYi26D EcxkUqFjvhD9aM1StN+1Wb4H24lU06c= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-485-4vFRPVO3Orarwy43TFtCTw-1; Mon, 24 Feb 2020 17:43:39 -0500 X-MC-Unique: 4vFRPVO3Orarwy43TFtCTw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2E50918C8C00; Mon, 24 Feb 2020 22:43:36 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C6F468B774; Mon, 24 Feb 2020 22:43:35 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 6083C860F1; Mon, 24 Feb 2020 22:43:34 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 01OMhWAc024203 for ; Mon, 24 Feb 2020 17:43:32 -0500 Received: by smtp.corp.redhat.com (Postfix) id 17B748ED01; Mon, 24 Feb 2020 22:43:32 +0000 (UTC) Received: from ovpn-121-250.rdu2.redhat.com (ovpn-121-250.rdu2.redhat.com [10.10.121.250]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9F3009078A; Mon, 24 Feb 2020 22:43:27 +0000 (UTC) Message-ID: <17916d0509978e14d9a5e9eb52d760fa57460542.camel@redhat.com> Subject: Re: kernel panic: audit: backlog limit exceeded From: Eric Paris To: Paul Moore , syzbot Date: Mon, 24 Feb 2020 17:43:27 -0500 In-Reply-To: References: <0000000000003cbb40059f4e0346@google.com> User-Agent: Evolution 3.34.4 (3.34.4-1.fc31) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-loop: linux-audit@redhat.com Cc: mareklindner@neomailbox.ch, sw@simonwunderlich.de, gregkh@linuxfoundation.org, a@unstable.cc, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, b.a.t.m.a.n@diktynna.open-mesh.org, linux-audit@redhat.com, netdev@vger.kernel.org, john.hammond@intel.com, fzago@cray.com, davem@davemloft.net, dan.carpenter@oracle.com X-BeenThere: linux-audit@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Linux Audit Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-audit-bounces@redhat.com Errors-To: linux-audit-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-ID: <20200224224327.Jxh2BLUFJynR5MhW2RqqdTwyM8nyCzc9ekRhuXB50u0@z> https://syzkaller.appspot.com/x/repro.syz?x=151b1109e00000 (the reproducer listed) looks like it is literally fuzzing the AUDIT_SET. Which seems like this is working as designed if it is setting the failure mode to 2. On Mon, 2020-02-24 at 17:38 -0500, Paul Moore wrote: > On Mon, Feb 24, 2020 at 3:18 AM syzbot > wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 36a44bcd Merge branch 'bnxt_en-shutdown-and-kexec- > > kdump-re.. > > git tree: net > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=148bfdd9e00000 > > kernel config: > > https://syzkaller.appspot.com/x/.config?x=768cc3d3e277cc16 > > dashboard link: > > https://syzkaller.appspot.com/bug?extid=9a5e789e4725b9ef1316 > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > syz repro: > > https://syzkaller.appspot.com/x/repro.syz?x=151b1109e00000 > > C reproducer: > > https://syzkaller.appspot.com/x/repro.c?x=128bfdd9e00000 > > > > The bug was bisected to: > > > > commit 0c1b9970ddd4cc41002321c3877e7f91aacb896d > > Author: Dan Carpenter > > Date: Fri Jul 28 14:42:27 2017 +0000 > > > > staging: lustre: lustre: Off by two in lmv_fid2path() > > > > bisection log: > > https://syzkaller.appspot.com/x/bisect.txt?x=17e6c3e9e00000 > > final crash: > > https://syzkaller.appspot.com/x/report.txt?x=1416c3e9e00000 > > console output: > > https://syzkaller.appspot.com/x/log.txt?x=1016c3e9e00000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the > > commit: > > Reported-by: syzbot+9a5e789e4725b9ef1316@syzkaller.appspotmail.com > > Fixes: 0c1b9970ddd4 ("staging: lustre: lustre: Off by two in > > lmv_fid2path()") > > > > audit: audit_backlog=13 > audit_backlog_limit=7 > > audit: audit_lost=1 audit_rate_limit=0 audit_backlog_limit=7 > > Kernel panic - not syncing: audit: backlog limit exceeded > > CPU: 1 PID: 9913 Comm: syz-executor024 Not tainted 5.6.0-rc1- > > syzkaller #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, > > BIOS Google 01/01/2011 > > Call Trace: > > __dump_stack lib/dump_stack.c:77 [inline] > > dump_stack+0x197/0x210 lib/dump_stack.c:118 > > panic+0x2e3/0x75c kernel/panic.c:221 > > audit_panic.cold+0x32/0x32 kernel/audit.c:307 > > audit_log_lost kernel/audit.c:377 [inline] > > audit_log_lost+0x8b/0x180 kernel/audit.c:349 > > audit_log_start kernel/audit.c:1788 [inline] > > audit_log_start+0x70e/0x7c0 kernel/audit.c:1745 > > audit_log+0x95/0x120 kernel/audit.c:2345 > > xt_replace_table+0x61d/0x830 net/netfilter/x_tables.c:1413 > > __do_replace+0x1da/0x950 net/ipv6/netfilter/ip6_tables.c:1084 > > do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline] > > do_ip6t_set_ctl+0x33a/0x4c8 net/ipv6/netfilter/ip6_tables.c:1681 > > nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] > > nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 > > ipv6_setsockopt net/ipv6/ipv6_sockglue.c:949 [inline] > > ipv6_setsockopt+0x147/0x180 net/ipv6/ipv6_sockglue.c:933 > > tcp_setsockopt net/ipv4/tcp.c:3165 [inline] > > tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3159 > > sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 > > __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 > > __do_sys_setsockopt net/socket.c:2146 [inline] > > __se_sys_setsockopt net/socket.c:2143 [inline] > > __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 > > do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 > > entry_SYSCALL_64_after_hwframe+0x49/0xbe > > RIP: 0033:0x44720a > > Code: 49 89 ca b8 37 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 1a e0 > > fb ff c3 66 0f 1f 84 00 00 00 00 00 49 89 ca b8 36 00 00 00 0f 05 > > <48> 3d 01 f0 ff ff 0f 83 fa df fb ff c3 66 0f 1f 84 00 00 00 00 00 > > RSP: 002b:00007ffd032dec78 EFLAGS: 00000286 ORIG_RAX: > > 0000000000000036 > > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044720a > > RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 > > RBP: 00007ffd032deda0 R08: 00000000000003b8 R09: 0000000000004000 > > R10: 00000000006d7b40 R11: 0000000000000286 R12: 00007ffd032deca0 > > R13: 00000000006d9d60 R14: 0000000000000029 R15: 00000000006d7ba0 > > Kernel Offset: disabled > > Rebooting in 86400 seconds.. > > > > > > --- > > This bug is generated by a bot. It may contain errors. > > See https://goo.gl/tpsmEJ for more information about syzbot. > > syzbot engineers can be reached at syzkaller@googlegroups.com. > > > > syzbot will keep track of this bug report. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > For information about bisection process see: > > https://goo.gl/tpsmEJ#bisection > > syzbot can test patches for this bug, for details see: > > https://goo.gl/tpsmEJ#testing-patches > > Similar to syzbot report 72461ac44b36c98f58e5, see my comments there. > -- Linux-audit mailing list Linux-audit@redhat.com https://www.redhat.com/mailman/listinfo/linux-audit