linux-kernel - [syzbot] [wireless?] WARNING in cfg80211_bss

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Message-ID: <0000000000003fd60705f9d7a53b@google.com>
Date:   Fri, 21 Apr 2023 05:17:49 -0700
From:   syzbot <syzbot+9d593239580fe3639301@...kaller.appspotmail.com>
To:     davem@...emloft.net, edumazet@...gle.com,
        johannes@...solutions.net, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] [wireless?] WARNING in cfg80211_bss_update (3)

Hello,

syzbot found the following issue on:

HEAD commit:    6a8f57ae2eb0 Linux 6.3-rc7
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1716e35bc80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=11869c60f54496a7
dashboard link: https://syzkaller.appspot.com/bug?extid=9d593239580fe3639301
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/beced60615bb/disk-6a8f57ae.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9ba2bd636062/vmlinux-6a8f57ae.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1f235faaf4bc/bzImage-6a8f57ae.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9d593239580fe3639301@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 15587 at net/wireless/scan.c:1584 cfg80211_combine_bsses net/wireless/scan.c:1584 [inline]
WARNING: CPU: 1 PID: 15587 at net/wireless/scan.c:1584 cfg80211_bss_update+0x197d/0x21f0 net/wireless/scan.c:1778
Modules linked in:
CPU: 1 PID: 15587 Comm: kworker/u4:21 Not tainted 6.3.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: phy15 ieee80211_iface_work
RIP: 0010:cfg80211_combine_bsses net/wireless/scan.c:1584 [inline]
RIP: 0010:cfg80211_bss_update+0x197d/0x21f0 net/wireless/scan.c:1778
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 15 06 00 00 49 c7 47 48 00 00 00 00 31 f6 31 ff e8 dd 1e 24 f8 e9 5c f1 ff ff e8 63 22 24 f8 <0f> 0b e9 8a f3 ff ff e8 57 22 24 f8 0f 0b 4c 89 f7 e8 6d 4d b5 fa
RSP: 0018:ffffc9000637f598 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffff88803b8cd7c0 RSI: ffffffff895ec8fd RDI: 0000000000000000
RBP: ffff88807d2a8000 R08: 0000000000000000 R09: 0000000000000006
R10: 0000000000000006 R11: 0000000000094001 R12: ffff8880762a0068
R13: 0000000000000005 R14: 0000000000000006 R15: ffff8880762a0000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f57b2eff8 CR3: 000000007df78000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 cfg80211_inform_single_bss_frame_data+0x72c/0x1020 net/wireless/scan.c:2492
 cfg80211_inform_bss_frame_data+0xc3/0xca0 net/wireless/scan.c:2525
 ieee80211_bss_info_update+0x35c/0xb50 net/mac80211/scan.c:190
 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x19c9/0x3030 net/mac80211/ibss.c:1638
 ieee80211_iface_process_skb net/mac80211/iface.c:1583 [inline]
 ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1637
 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>


---
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