linux-kernel - WARNING in __cfg80211_connect

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Date:   Fri, 03 Jul 2020 23:41:15 -0700
From:   syzbot <syzbot+cc4c0f394e2611edba66@...kaller.appspotmail.com>
To:     davem@...emloft.net, johannes@...solutions.net, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: WARNING in __cfg80211_connect_result

Hello,

syzbot found the following crash on:

HEAD commit:    23212a70 Merge branch 'mptcp-add-receive-buffer-auto-tuning'
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=155842d5100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=829871134ca5e230
dashboard link: https://syzkaller.appspot.com/bug?extid=cc4c0f394e2611edba66
compiler:       gcc (GCC) 10.1.0-syz 20200507

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+cc4c0f394e2611edba66@...kaller.appspotmail.com

ip6_tunnel: syzkaller1 xmit: Local address not yet configured!
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9155 at net/wireless/sme.c:757 __cfg80211_connect_result+0xf71/0x13a0 net/wireless/sme.c:757
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9155 Comm: kworker/u4:17 Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: cfg80211 cfg80211_event_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 exc_invalid_op+0x24d/0x400 arch/x86/kernel/traps.c:235
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:__cfg80211_connect_result+0xf71/0x13a0 net/wireless/sme.c:757
Code: 89 be ac 02 00 00 48 c7 c7 00 2d 16 89 c6 05 ba ce 34 03 01 e8 35 58 e5 f9 e9 4f f6 ff ff e8 36 ad fe f9 0f 0b e8 2f ad fe f9 <0f> 0b e9 0c f2 ff ff e8 23 ad fe f9 e8 ee 51 71 00 31 ff 89 c3 89
RSP: 0018:ffffc90001ab7bb8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888091d10000 RCX: ffffffff87749792
RDX: ffff888059f5c4c0 RSI: ffffffff8774a321 RDI: 0000000000000005
RBP: ffff888040f72618 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888040f72628 R14: ffff888091d10200 R15: ffff888040f72620
 cfg80211_process_wdev_events+0x2c6/0x5b0 net/wireless/util.c:885
 cfg80211_process_rdev_events+0x6e/0x100 net/wireless/util.c:926
 cfg80211_event_work+0x1a/0x20 net/wireless/core.c:320
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Kernel Offset: disabled


---
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