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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, 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 878ABC282DD for ; Fri, 10 Jan 2020 19:11:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5DA3B206DA for ; Fri, 10 Jan 2020 19:11:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727612AbgAJTLL (ORCPT ); Fri, 10 Jan 2020 14:11:11 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:36714 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727355AbgAJTLK (ORCPT ); Fri, 10 Jan 2020 14:11:10 -0500 Received: by mail-il1-f200.google.com with SMTP id t2so2238483ilp.3 for ; Fri, 10 Jan 2020 11:11:10 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=Fy/WFcnJ25iyWFvsl9r5AXVP+hcY+D0Rh4DTlOZdONM=; b=ADt0GHVMMTH1Z49UML4SzYvD07AdiTupKMfWzDpSg97zjNTqDUy7nzDeLlfJtjwXzS GuNik1kW3puTzBp9LpMxsM66y8Qm6fYa32f96eGEuMSNzCvlvxrrd5asbbKJ/XlyYJr9 Hw7TSmP06WA51GndRQdRcj9iG/MfTyWyOXlStM3PNY8Vwkq1hSspmwUcx5HGjFHqQpyb Pzk9HRmz9RlTL95bIrM6xSit2H41OuRl/TfkikxKcZva1UCHlIVxP6WNhdGKQuYMDdCE NZvletyMII0duwT8KPLJiZDYgGgRzWg4iWW5bpvU16XRhF3r9xyIXuIx+VP4YMA1IJLa sQmg== X-Gm-Message-State: APjAAAXYfBPkXe7iqOI6LXYr8mD+VRzQR1lQ7I+fYyoaRQavX0rjiznV /PvBZRnlMG+lvKw1LxytoHJRdpexYDH9xF0EaMx1MFHvF7+9 X-Google-Smtp-Source: APXvYqwY3GgaXVZtkAQIcr7wURVRj5PLnEFSR3Wg8Z1BDSmZIfg3rWTj3510J3NUyAXFL3aFFxXUt677cxsGvHDKy4AIRx2nqtdv MIME-Version: 1.0 X-Received: by 2002:a5d:97c3:: with SMTP id k3mr3909079ios.38.1578683470163; Fri, 10 Jan 2020 11:11:10 -0800 (PST) Date: Fri, 10 Jan 2020 11:11:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000073b469059bcde315@google.com> Subject: BUG: unable to handle kernel NULL pointer dereference in cfg80211_wext_siwrts From: syzbot To: davem@davemloft.net, johannes@sipsolutions.net, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, 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: 2f806c2a Merge branch 'net-ungraft-prio' git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1032069ee00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5c90cac8f1f8c619 dashboard link: https://syzkaller.appspot.com/bug?extid=34b582cf32c1db008f8e compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+34b582cf32c1db008f8e@syzkaller.appspotmail.com BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD a7499067 P4D a7499067 PUD 9a778067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 12180 Comm: syz-executor.2 Not tainted 5.5.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffffc90001727a78 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888218678540 RCX: ffffc9000e5df000 RDX: 1ffffffff1148744 RSI: 0000000000000008 RDI: ffff888218678540 RBP: ffffc90001727ab8 R08: ffff8880957ac0c0 R09: ffffed1015d2703d R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffffffff88a438a0 R13: ffff88808f309000 R14: ffffc90001727bb0 R15: 0000000000000000 FS: 00007f1e9f870700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000094518000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rdev_set_wiphy_params net/wireless/rdev-ops.h:542 [inline] cfg80211_wext_siwrts+0x265/0x8f0 net/wireless/wext-compat.c:267 ioctl_standard_call+0xca/0x1d0 net/wireless/wext-core.c:1015 wireless_process_ioctl.constprop.0+0x236/0x2b0 net/wireless/wext-core.c:953 wext_ioctl_dispatch net/wireless/wext-core.c:986 [inline] wext_ioctl_dispatch net/wireless/wext-core.c:974 [inline] wext_handle_ioctl+0x106/0x1c0 net/wireless/wext-core.c:1047 sock_ioctl+0x47d/0x790 net/socket.c:1112 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45af49 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1e9f86fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49 RDX: 0000000020000040 RSI: 0000000000008b22 RDI: 0000000000000004 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1e9f8706d4 R13: 00000000004c2837 R14: 00000000004d8b30 R15: 00000000ffffffff Modules linked in: CR2: 0000000000000000 ---[ end trace 4579299d7d6f7d47 ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffffc90001727a78 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888218678540 RCX: ffffc9000e5df000 RDX: 1ffffffff1148744 RSI: 0000000000000008 RDI: ffff888218678540 RBP: ffffc90001727ab8 R08: ffff8880957ac0c0 R09: ffffed1015d2703d R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffffffff88a438a0 R13: ffff88808f309000 R14: ffffc90001727bb0 R15: 0000000000000000 FS: 00007f1e9f870700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff5d5b8fc8 CR3: 0000000094518000 CR4: 00000000001406e0 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.