netdev - WARNING in sta_info_insert

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Date:   Sun, 31 Jan 2021 21:26:23 -0800
From:   syzbot <syzbot+8dcc087eb24227ded47e@...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 sta_info_insert_check

Hello,

syzbot found the following issue on:

HEAD commit:    bec4c296 Merge tag 'ecryptfs-5.11-rc6-setxattr-fix' of git..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11991778d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f75d66d6d359ef2f
dashboard link: https://syzkaller.appspot.com/bug?extid=8dcc087eb24227ded47e
userspace arch: arm64

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+8dcc087eb24227ded47e@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 118 at net/mac80211/sta_info.c:547 sta_info_insert_check+0x48/0xc4 net/mac80211/sta_info.c:547
Modules linked in:
CPU: 0 PID: 118 Comm: kworker/u4:3 Not tainted 5.11.0-rc5-syzkaller-00239-gbec4c2968fce #0
Hardware name: linux,dummy-virt (DT)
Workqueue: phy6 ieee80211_iface_work
pstate: 40400009 (nZcv daif +PAN -UAO -TCO BTYPE=--)
pc : sta_info_insert_check+0x48/0xc4 net/mac80211/sta_info.c:547
lr : sta_info_insert_rcu+0x34/0x90 net/mac80211/sta_info.c:725
sp : ffff800013f3bbf0
x29: ffff800013f3bbf0 x28: ffff8000132e4538 
x27: f6ff00002070c998 x26: dead000000000100 
x25: dead000000000122 x24: f6ff00002070d340 
x23: f6ff00002070d280 x22: faff000020710800 
x21: faff000020710df0 x20: f6ff00002070c940 
x19: f7ff000020784000 x18: 0000000000000000 
x17: 0000000000000000 x16: 0000000000000000 
x15: 0000ad1062c19046 x14: f7ff000020796098 
x13: 000000000000044b x12: f6ff00002070c940 
x11: 000000000000000c x10: 0000000000000000 
x9 : faff000020713b90 x8 : 0000000000000fff 
x7 : 0000000000000000 x6 : f6ff00002070c940 
x5 : 0000000000000fff x4 : 0000000000000000 
x3 : 0000000000000100 x2 : 00000000ffeeffff 
x1 : 00000000ffffffff x0 : 00000000ffeefdf7 
Call trace:
 sta_info_insert_check+0x48/0xc4 net/mac80211/sta_info.c:547
 sta_info_insert_rcu+0x34/0x90 net/mac80211/sta_info.c:725
 ieee80211_ibss_finish_sta+0x84/0x140 net/mac80211/ibss.c:592
 ieee80211_ibss_work+0xe4/0x560 net/mac80211/ibss.c:1700
 ieee80211_iface_work+0x2b8/0x33c net/mac80211/iface.c:1445
 process_one_work+0x1d8/0x360 kernel/workqueue.c:2275
 worker_thread+0x74/0x440 kernel/workqueue.c:2421
 kthread+0x178/0x180 kernel/kthread.c:292
 ret_from_fork+0x10/0x30 arch/arm64/kernel/entry.S:958


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