]> www.infradead.org Git - users/jedix/linux-maple.git/commit
wifi: nl80211: reject cooked mode if it is set along with other flags
authorVitaliy Shevtsov <v.shevtsov@mt-integration.ru>
Fri, 31 Jan 2025 15:26:55 +0000 (20:26 +0500)
committerJohannes Berg <johannes.berg@intel.com>
Tue, 11 Feb 2025 11:39:49 +0000 (12:39 +0100)
commit49f27f29446a5bfe633dd2cc0cfebd48a1a5e77f
tree08daab1f63beec205d2ab9478280a6fc208952a2
parentb76adb9758f8eaaf22b824d0bcdd694551ce0557
wifi: nl80211: reject cooked mode if it is set along with other flags

It is possible to set both MONITOR_FLAG_COOK_FRAMES and MONITOR_FLAG_ACTIVE
flags simultaneously on the same monitor interface from the userspace. This
causes a sub-interface to be created with no IEEE80211_SDATA_IN_DRIVER bit
set because the monitor interface is in the cooked state and it takes
precedence over all other states. When the interface is then being deleted
the kernel calls WARN_ONCE() from check_sdata_in_driver() because of missing
that bit.

Fix this by rejecting MONITOR_FLAG_COOK_FRAMES if it is set along with
other flags.

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Fixes: 66f7ac50ed7c ("nl80211: Add monitor interface configuration flags")
Cc: stable@vger.kernel.org
Reported-by: syzbot+2e5c1e55b9e5c28a3da7@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=2e5c1e55b9e5c28a3da7
Signed-off-by: Vitaliy Shevtsov <v.shevtsov@mt-integration.ru>
Link: https://patch.msgid.link/20250131152657.5606-1-v.shevtsov@mt-integration.ru
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
net/wireless/nl80211.c