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, 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 A9D47C6377D for ; Thu, 22 Jul 2021 02:10:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 946B460FE9 for ; Thu, 22 Jul 2021 02:10:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230017AbhGVB3w (ORCPT ); Wed, 21 Jul 2021 21:29:52 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:36659 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230366AbhGVB3u (ORCPT ); Wed, 21 Jul 2021 21:29:50 -0400 Received: by mail-il1-f199.google.com with SMTP id j13-20020a056e02218db02902141528bc7cso2668525ila.3 for ; Wed, 21 Jul 2021 19:10:25 -0700 (PDT) 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=MRVdo3BP1bfGw5Jrpums3dR51jXt/diLyZxT/ln8Sgw=; b=nET7+Z4Sovkgx7ALax0JbyU8qwXFo+qWs3zGn+43V0IAp0oHEqEIyNQpJauQxk6KYN Eb4QjXz+n2P/j+4Mt17EtyqcgcaM+GU4eGCqusKgu5dK0Q1gWREylZAhkfNmB3xQBe20 RhLRMIthZYCetYoxPNbIiiENemoYvYVK5Xo7OziWG5r/zRviRhNXO976enhNfI9HnT+i XhvPVrUvq+EO3LIbCD4gZOFheXzjnncIa1VsHiLoOUObCpe8NQHeXkshVPwZmWykR7F3 FLCY1RYTgksklwjihcVtK5BYmFDCe5c+OENEkKLkK/2Ek/HePr19uGRhdRwfSLV9w2o1 CTPA== X-Gm-Message-State: AOAM531/QONFD7Y+Xlie9/W4Tcn/2gResMpZhdszF6H7SlCqkQ5H9VIU 5aGDWX1hxPUGjsQ+ZporYVqCbvtOzcJv5bdXKmL6Xq71lOtb X-Google-Smtp-Source: ABdhPJzUl8h8RWguJgP1hh4+Fa0JSzaHhsIQzPR1aO9Qmj0Wg7bfZruedIEsxwi0atJinBStdSTzaFZxsr4N2+tjyW3MAjsfaBfv MIME-Version: 1.0 X-Received: by 2002:a02:c491:: with SMTP id t17mr28709574jam.56.1626919825473; Wed, 21 Jul 2021 19:10:25 -0700 (PDT) Date: Wed, 21 Jul 2021 19:10:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000046837e05c7acca73@google.com> Subject: [syzbot] WARNING in ieee80211_offchannel_return 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: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 23d2b94043ca igmp: Add ip_mc_list lock in ip_check_mc_rcu git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=16cde812300000 kernel config: https://syzkaller.appspot.com/x/.config?x=da140227e4f25b17 dashboard link: https://syzkaller.appspot.com/bug?extid=4c10031c63f173ea1dfc 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+4c10031c63f173ea1dfc@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8308 at net/mac80211/offchannel.c:136 ieee80211_offchannel_return+0x3e6/0x4a0 net/mac80211/offchannel.c:136 Modules linked in: CPU: 0 PID: 8308 Comm: syz-executor.4 Tainted: G W 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ieee80211_offchannel_return+0x3e6/0x4a0 net/mac80211/offchannel.c:136 Code: 00 48 01 c6 e8 4b 04 e9 f8 e9 0e ff ff ff e8 01 96 f9 f8 31 d2 48 89 de 4c 89 e7 e8 34 b3 15 00 e9 f7 fe ff ff e8 ea 95 f9 f8 <0f> 0b e9 6c ff ff ff e8 ae 1d 40 f9 e9 51 fc ff ff 48 89 df e8 d1 RSP: 0018:ffffc900020f7230 EFLAGS: 00010212 RAX: 00000000000006ed RBX: 0000000000000001 RCX: ffffc90012282000 RDX: 0000000000040000 RSI: ffffffff887bf386 RDI: 0000000000000003 RBP: ffff888075980d20 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff887beffc R11: 0000000000000000 R12: ffff88807443c800 R13: ffff888075982968 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f1a294ca700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f02e832aab4 CR3: 0000000081623000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ieee80211_scan_completed+0x776/0xef0 net/mac80211/scan.c:470 ieee80211_scan_cancel+0x165/0x9b0 net/mac80211/scan.c:1277 ieee80211_do_stop+0x1863/0x2050 net/mac80211/iface.c:384 ieee80211_runtime_change_iftype net/mac80211/iface.c:1656 [inline] ieee80211_if_change_type+0x383/0x840 net/mac80211/iface.c:1694 ieee80211_change_iface+0x26/0x210 net/mac80211/cfg.c:157 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline] cfg80211_change_iface+0x335/0xf60 net/wireless/util.c:1073 nl80211_set_interface+0x65c/0x8d0 net/wireless/nl80211.c:3923 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1a294ca188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000006 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe92760a3f R14: 00007f1a294ca300 R15: 0000000000022000 --- 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.