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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 BABA1C33CB1 for ; Fri, 17 Jan 2020 13:46:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9B2072073A for ; Fri, 17 Jan 2020 13:46:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728773AbgAQNqN (ORCPT ); Fri, 17 Jan 2020 08:46:13 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:33227 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id 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X-Received: by 2002:a5e:dd03:: with SMTP id t3mr30554369iop.128.1579268772517; Fri, 17 Jan 2020 05:46:12 -0800 (PST) Date: Fri, 17 Jan 2020 05:46:12 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000030dddb059c562a3f@google.com> Subject: general protection fault in can_rx_register From: syzbot To: davem@davemloft.net, dev.kurt@vandijck-laurijssen.be, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, o.rempel@pengutronix.de, socketcan@hartkopp.net, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: f5ae2ea6 Fix built-in early-load Intel microcode alignment git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1033df15e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfbb8fa33f49f9f3 dashboard link: https://syzkaller.appspot.com/bug?extid=c3ea30e1e2485573f953 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13204f15e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=138f5db9e00000 The bug was bisected to: commit 9868b5d44f3df9dd75247acd23dddff0a42f79be Author: Kurt Van Dijck Date: Mon Oct 8 09:48:33 2018 +0000 can: introduce CAN_REQUIRED_SIZE macro bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=129bfdb9e00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=119bfdb9e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=169bfdb9e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+c3ea30e1e2485573f953@syzkaller.appspotmail.com Fixes: 9868b5d44f3d ("can: introduce CAN_REQUIRED_SIZE macro") kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9593 Comm: syz-executor302 Not tainted 5.5.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlist_add_head_rcu include/linux/rculist.h:528 [inline] RIP: 0010:can_rx_register+0x43b/0x600 net/can/af_can.c:476 Code: 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 89 22 8a fa 4c 89 33 4d 89 e5 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 4c 89 e7 e8 c5 21 8a fa 4d 8b 34 24 4c 89 RSP: 0018:ffffc90003e27d00 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880a77336c8 RCX: ffff88809306a100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a77336c0 RBP: ffffc90003e27d58 R08: ffffffff87289cd6 R09: fffff520007c4f94 R10: fffff520007c4f94 R11: 0000000000000000 R12: 0000000000000008 R13: 0000000000000001 R14: ffff88809fbcf000 R15: ffff8880a7733690 FS: 00007fb132f26700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000178f590 CR3: 00000000996d6000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: raw_enable_filters net/can/raw.c:189 [inline] raw_enable_allfilters net/can/raw.c:255 [inline] raw_bind+0x326/0x1230 net/can/raw.c:428 __sys_bind+0x2bd/0x3a0 net/socket.c:1649 __do_sys_bind net/socket.c:1660 [inline] __se_sys_bind net/socket.c:1658 [inline] __x64_sys_bind+0x7a/0x90 net/socket.c:1658 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446ba9 Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb132f25d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 00000000006dbc88 RCX: 0000000000446ba9 RDX: 0000000000000008 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00000000006dbc80 R08: 00007fb132f26700 R09: 0000000000000000 R10: 00007fb132f26700 R11: 0000000000000246 R12: 00000000006dbc8c R13: 0000000000000000 R14: 0000000000000000 R15: 068500100000003c Modules linked in: ---[ end trace 0dedabb13ca8e7d7 ]--- RIP: 0010:hlist_add_head_rcu include/linux/rculist.h:528 [inline] RIP: 0010:can_rx_register+0x43b/0x600 net/can/af_can.c:476 Code: 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 89 22 8a fa 4c 89 33 4d 89 e5 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 4c 89 e7 e8 c5 21 8a fa 4d 8b 34 24 4c 89 RSP: 0018:ffffc90003e27d00 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880a77336c8 RCX: ffff88809306a100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a77336c0 RBP: ffffc90003e27d58 R08: ffffffff87289cd6 R09: fffff520007c4f94 R10: fffff520007c4f94 R11: 0000000000000000 R12: 0000000000000008 R13: 0000000000000001 R14: ffff88809fbcf000 R15: ffff8880a7733690 FS: 00007fb132f26700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000178f590 CR3: 00000000996d6000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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