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=-3.7 required=3.0 tests=BAYES_00,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 7C073C4332B for ; Tue, 19 Jan 2021 18:42:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 548282310C for ; Tue, 19 Jan 2021 18:42:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404593AbhASSGO (ORCPT ); Tue, 19 Jan 2021 13:06:14 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:34506 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391640AbhASRk4 (ORCPT ); Tue, 19 Jan 2021 12:40:56 -0500 Received: by mail-io1-f70.google.com with SMTP id r16so36782880ioa.1 for ; Tue, 19 Jan 2021 09:40:40 -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=cz+TyUAdSvRaaR7wt0B3euj1+FtE/JPqehIJ2K4wFxI=; b=V5Cs+I9TWWG8s29vKbD9Chpka7HdC2ckF3k5QTFn1tkVO+npzZZjuh7UDHkqKjZIk/ hEvRdcDxXnFZEZEEYHzVhAm2rW1WwYIp/7N+5yePrjStZmd4llL7SovHkCdoXw0G7y9f y+OckGPqxuv6Y7uwDbZcAMvD4KR5U2H9REf4pwg5BuOSRJ+BmtXJ0iwFOfPOVebBw73j S+OIU5jD5quVWifAqKcniUNuCWH2maxsmZz3JzLclBPXQMdiSlbfAHsKBtNtk+g2Zx5i S+chiJvB3ra40DfmVY/uF7CFaf1/f4W4NwYL/mWGSTx4gj2ynai9vFkHjjtE4g0M8B4/ +hCw== X-Gm-Message-State: AOAM531QK0YsrYxOwLZJq1FeMGHunqZ+gJi/Mh1llIQgMwGxFcHSn5ut wpEeHgKdJ4oNweb0czUr+sUC/FFnh1YYAuWKMODbUwImfxpX X-Google-Smtp-Source: ABdhPJwlc+pZ9ZKO5apRJCpOHaEETxebGPE+1ywptP03q7TAFkDD2MsfFXq3OJiJKgmCn346FiZgeNF7pFQ6Mw8wNF7tnjaJ8vul MIME-Version: 1.0 X-Received: by 2002:a92:b503:: with SMTP id f3mr4214202ile.123.1611078015449; Tue, 19 Jan 2021 09:40:15 -0800 (PST) Date: Tue, 19 Jan 2021 09:40:15 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d1018c05b944543e@google.com> Subject: WARNING in cfg80211_bss_update From: syzbot To: davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, 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" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 66c55602 skbuff: back tiny skbs with kmalloc() in __netdev.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=121bf89f500000 kernel config: https://syzkaller.appspot.com/x/.config?x=c60c9ff9cc916cbc dashboard link: https://syzkaller.appspot.com/bug?extid=95c52e652a2fac1fcdf5 compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+95c52e652a2fac1fcdf5@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 25700 at net/wireless/scan.c:1565 cfg80211_combine_bsses net/wireless/scan.c:1565 [inline] WARNING: CPU: 1 PID: 25700 at net/wireless/scan.c:1565 cfg80211_bss_update+0x16cd/0x1c60 net/wireless/scan.c:1746 Modules linked in: CPU: 1 PID: 25700 Comm: kworker/u4:15 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy12 ieee80211_iface_work RIP: 0010:cfg80211_combine_bsses net/wireless/scan.c:1565 [inline] RIP: 0010:cfg80211_bss_update+0x16cd/0x1c60 net/wireless/scan.c:1746 Code: 00 48 c7 c7 20 8c 61 8a c6 05 88 7d b9 04 01 e8 a7 15 83 00 e9 27 ff ff ff e8 8f f0 3c f9 0f 0b e9 c2 f4 ff ff e8 83 f0 3c f9 <0f> 0b 4c 89 f7 e8 89 be 8c fb 31 ff 89 c6 88 44 24 70 e8 ec f6 3c RSP: 0000:ffffc90002e46f50 EFLAGS: 00010212 RAX: 00000000000026ce RBX: 0000000000000001 RCX: ffffc90015d60000 RDX: 0000000000040000 RSI: ffffffff8835d93d RDI: 0000000000000003 RBP: ffff88802f58fc00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8835d08d R11: 0000000000000000 R12: ffff888022182c68 R13: 0000000000000005 R14: ffff88802f58fc10 R15: ffff888022182c00 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ee27000 CR3: 00000000144e2000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfg80211_inform_single_bss_frame_data+0x6e2/0xe90 net/wireless/scan.c:2400 cfg80211_inform_bss_frame_data+0xa7/0xb10 net/wireless/scan.c:2433 ieee80211_bss_info_update+0x3ce/0xb20 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline] ieee80211_rx_mgmt_probe_beacon+0xccd/0x16b0 net/mac80211/ibss.c:1615 ieee80211_ibss_rx_queued_mgmt+0xe3e/0x1870 net/mac80211/ibss.c:1642 ieee80211_iface_work+0x761/0x9e0 net/mac80211/iface.c:1423 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.