netdev - Re: [syzbot] [wireless?] WARNING in __cfg80211_bss

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Message-ID: <0000000000002a80cf061d6d9f16@google.com>
Date: Wed, 17 Jul 2024 01:55:19 -0700
From: syzbot <syzbot+1a797e1c81be78a2ace7@...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: Re: [syzbot] [wireless?] WARNING in __cfg80211_bss_update (2)

syzbot has found a reproducer for the following issue on:

HEAD commit:    58f9416d413a Merge branch 'ice-support-to-dump-phy-config-..
git tree:       net-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=14cae9e9980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=db697e01efa9d1d7
dashboard link: https://syzkaller.appspot.com/bug?extid=1a797e1c81be78a2ace7
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=152be1fd980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16446b4e980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3fb480f5ebf6/disk-58f9416d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1a62eb04b3aa/vmlinux-58f9416d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/67d14a897f84/bzImage-58f9416d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1a797e1c81be78a2ace7@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 24 at net/wireless/scan.c:1743 cfg80211_combine_bsses net/wireless/scan.c:1743 [inline]
WARNING: CPU: 1 PID: 24 at net/wireless/scan.c:1743 __cfg80211_bss_update+0x1b4a/0x2170 net/wireless/scan.c:1983
Modules linked in:
CPU: 1 PID: 24 Comm: ksoftirqd/1 Not tainted 6.10.0-rc6-syzkaller-01414-g58f9416d413a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:cfg80211_combine_bsses net/wireless/scan.c:1743 [inline]
RIP: 0010:__cfg80211_bss_update+0x1b4a/0x2170 net/wireless/scan.c:1983
Code: e1 07 fe c1 38 c1 0f 8c 44 fb ff ff 48 8b 7c 24 70 e8 ba 04 24 f7 e9 35 fb ff ff e8 80 e6 bd f6 90 0f 0b 90 e9 bb fb ff ff 90 <0f> 0b 90 48 89 ef e8 7b 9a de f9 84 c0 0f 84 9f 00 00 00 e8 5e e6
RSP: 0018:ffffc900001e6db8 EFLAGS: 00010287
RAX: ffff888024282410 RBX: ffff888024282810 RCX: dffffc0000000000
RDX: ffff8880176f8000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: ffff88802a031810 R08: ffffffff8ad83d6b R09: 0245006400000000
R10: 0000505050505050 R11: 0003000000000000 R12: ffff88802a031800
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888024282800
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000066ab50 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 cfg80211_inform_single_bss_data+0xd51/0x2030 net/wireless/scan.c:2331
 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3159
 cfg80211_inform_bss_frame_data+0x3bc/0x720 net/wireless/scan.c:3249
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5223 [inline]
 ieee80211_rx_list+0x2b02/0x3780 net/mac80211/rx.c:5460
 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5483
 ieee80211_rx include/net/mac80211.h:5132 [inline]
 ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:439
 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:785
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 run_ksoftirqd+0xca/0x130 kernel/softirq.c:928
 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.