linux-kernel - Re: [syzbot] [wireless?] UBSAN: array-index-out-of-bounds in cfg80211_inform_bss_frame

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Message-ID: <684c985a.050a0220.be214.02a7.GAE@google.com>
Date: Fri, 13 Jun 2025 14:30:02 -0700
From: syzbot <syzbot+fd222bb38e916df26fa4@...kaller.appspotmail.com>
To: johannes.berg@...el.com, johannes@...solutions.net, 
	lachlan.hodges@...semicro.com, linux-kernel@...r.kernel.org, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wireless?] UBSAN: array-index-out-of-bounds in cfg80211_inform_bss_frame_data

syzbot has bisected this issue to:

commit 1e1f706fc2ce90eaaf3480b3d5f27885960d751c
Author: Lachlan Hodges <lachlan.hodges@...semicro.com>
Date:   Tue Jun 3 05:35:38 2025 +0000

    wifi: cfg80211/mac80211: correctly parse S1G beacon optional elements

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10f60e82580000
start commit:   d9816ec74e6d macsec: MACsec SCI assignment for ES = 0
git tree:       net
final oops:     https://syzkaller.appspot.com/x/report.txt?x=12f60e82580000
console output: https://syzkaller.appspot.com/x/log.txt?x=14f60e82580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=73696606574e3967
dashboard link: https://syzkaller.appspot.com/bug?extid=fd222bb38e916df26fa4
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1042460c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1442460c580000

Reported-by: syzbot+fd222bb38e916df26fa4@...kaller.appspotmail.com
Fixes: 1e1f706fc2ce ("wifi: cfg80211/mac80211: correctly parse S1G beacon optional elements")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection