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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 42D91C43460 for ; Tue, 13 Apr 2021 05:58:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2270E613AB for ; Tue, 13 Apr 2021 05:58:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344812AbhDMF6w (ORCPT ); Tue, 13 Apr 2021 01:58:52 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:54605 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344790AbhDMF6h (ORCPT ); Tue, 13 Apr 2021 01:58:37 -0400 Received: by mail-io1-f71.google.com with SMTP id s6so10351409iom.21 for ; Mon, 12 Apr 2021 22:58:18 -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=OaHTjR/nmaSdf3qrZfC3UuSGJvdUuFV++rwAwVRpbI0=; b=R105//nOZz1tFPg++s0Pif3LxxKCC408ZwhM2YoMMn89i4rSMIZBXD3TmhEuEBhJtV oLbUUSJrq8uZypFo4zEXg0bw2BX5l6Thvga9v121HhEkljGUetUh+f2phz9+4I0ZkaU4 B9F4Gn7NoVG0qjYqYMAq1h5LDurfd44MrjqAuKVNCPTcN/Qab4nWwhfG1pyqsn4y7yVS rLqUdWqNk63sQHzNpfcA4hQO9zVbMxdoL8DpEnQ1GXl9RsVgS/ojyIg2LOS16lN+ArSx jb4sr23tedia/ROPZXi7JfNv/Kmxi7UZc2zyEQDNHmH2wpenz3qGkHkmMMNXtOdiaJ1s uKwQ== X-Gm-Message-State: AOAM533+EWm6Du5zATHhDyRt20CEb/Q3crqv3JWnNpis5xQJrtkNAAZJ vWsR/PgF2eM9GRknT4aofegW3D9ETQ/NtVNs5yw2ubk20yqV X-Google-Smtp-Source: ABdhPJz8BKOHZJgPvwwGhRTvvTaARVh/ADkeXVxzQnyQlVNRGaix5R+iCXNtYhnr47TNG9zaa+Khk1xekhuZugE4IimpTPcBKw/v MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2182:: with SMTP id j2mr27111406ila.89.1618293498004; Mon, 12 Apr 2021 22:58:18 -0700 (PDT) Date: Mon, 12 Apr 2021 22:58:17 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000174a1c05bfd45183@google.com> Subject: [syzbot] KASAN: null-ptr-deref Write in rhashtable_free_and_destroy (2) 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: d93a0d43 Merge tag 'block-5.12-2021-04-02' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d81cfcd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=71a75beb62b62a34 dashboard link: https://syzkaller.appspot.com/bug?extid=860268315ba86ea6b96b compiler: Debian clang version 11.0.1-2 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+860268315ba86ea6b96b@syzkaller.appspotmail.com ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: null-ptr-deref in test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:70 [inline] BUG: KASAN: null-ptr-deref in try_to_grab_pending+0xee/0xa50 kernel/workqueue.c:1257 Write of size 8 at addr 0000000000000088 by task kworker/0:3/4787 CPU: 0 PID: 4787 Comm: kworker/0:3 Not tainted 5.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events cfg80211_destroy_iface_wk Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x176/0x24e lib/dump_stack.c:120 __kasan_report mm/kasan/report.c:403 [inline] kasan_report+0x152/0x200 mm/kasan/report.c:416 check_region_inline mm/kasan/generic.c:135 [inline] kasan_check_range+0x2b5/0x2f0 mm/kasan/generic.c:186 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:70 [inline] try_to_grab_pending+0xee/0xa50 kernel/workqueue.c:1257 __cancel_work_timer+0x81/0x5b0 kernel/workqueue.c:3098 rhashtable_free_and_destroy+0x25/0x8b0 lib/rhashtable.c:1137 mesh_table_free net/mac80211/mesh_pathtbl.c:70 [inline] mesh_pathtbl_unregister+0x4b/0xa0 net/mac80211/mesh_pathtbl.c:812 unregister_netdevice_many+0x12ea/0x18e0 net/core/dev.c:10951 unregister_netdevice_queue+0x2a9/0x300 net/core/dev.c:10868 unregister_netdevice include/linux/netdevice.h:2884 [inline] _cfg80211_unregister_wdev+0x17b/0x5b0 net/wireless/core.c:1127 ieee80211_if_remove+0x1cc/0x250 net/mac80211/iface.c:2020 ieee80211_del_iface+0x12/0x20 net/mac80211/cfg.c:144 rdev_del_virtual_intf net/wireless/rdev-ops.h:57 [inline] cfg80211_destroy_ifaces+0x182/0x250 net/wireless/core.c:341 cfg80211_destroy_iface_wk+0x30/0x40 net/wireless/core.c:354 process_one_work+0x789/0xfd0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 ================================================================== --- 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.