netdev - [syzbot] [wireless?] KMSAN: uninit-value in cfg80211_tx_mlme

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Message-ID: <67bf36d3.050a0220.38b081.01ff.GAE@google.com>
Date: Wed, 26 Feb 2025 07:44:19 -0800
From: syzbot <syzbot+5a7b40bcb34dea5ca959@...kaller.appspotmail.com>
To: johannes@...solutions.net, linux-kernel@...r.kernel.org, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [wireless?] KMSAN: uninit-value in cfg80211_tx_mlme_mgmt

Hello,

syzbot found the following issue on:

HEAD commit:    ff202c5028a1 Merge tag 'soc-fixes-6.14' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12d447a4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=aca5947365998f67
dashboard link: https://syzkaller.appspot.com/bug?extid=5a7b40bcb34dea5ca959
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/788b15dfbf95/disk-ff202c50.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/48f236cd3e71/vmlinux-ff202c50.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b92116dbc946/bzImage-ff202c50.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5a7b40bcb34dea5ca959@...kaller.appspotmail.com

 cfg80211_wiphy_work+0x396/0x860 net/wireless/core.c:435
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xc1a/0x1e80 kernel/workqueue.c:3317
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3398
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
---[ end trace 0000000000000000 ]---
=====================================================
BUG: KMSAN: uninit-value in cfg80211_tx_mlme_mgmt+0x155/0x300 net/wireless/mlme.c:226
 cfg80211_tx_mlme_mgmt+0x155/0x300 net/wireless/mlme.c:226
 ieee80211_report_disconnect net/mac80211/mlme.c:4238 [inline]
 ieee80211_sta_connection_lost+0xfa/0x150 net/mac80211/mlme.c:7811
 ieee80211_sta_work+0x1dea/0x4ef0
 ieee80211_iface_work+0x1900/0x1970 net/mac80211/iface.c:1684
 cfg80211_wiphy_work+0x396/0x860 net/wireless/core.c:435
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xc1a/0x1e80 kernel/workqueue.c:3317
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3398
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Local variable frame_buf created at:
 ieee80211_sta_connection_lost+0x43/0x150 net/mac80211/mlme.c:7806
 ieee80211_sta_work+0x1dea/0x4ef0

CPU: 1 UID: 0 PID: 4086 Comm: kworker/u8:16 Tainted: G        W          6.14.0-rc3-syzkaller-00267-gff202c5028a1 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound cfg80211_wiphy_work
=====================================================


---
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