staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()grafted

rtw_action_frame_parse() takes a frame_len parameter but never
actually checks it before indexing into the frame body:

	const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr);
	...
	c = frame_body[0];
	...
	a = frame_body[1];

frame_body already points 24 bytes (sizeof(struct
ieee80211_hdr_3addr)) into frame, so reading frame_body[0] and
frame_body[1] requires frame_len >= 26. A management action frame
shorter than that (e.g. exactly 24 bytes, the minimum a malicious
peer can send) causes a 1-2 byte out-of-bounds read.

This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and
cfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass
attacker/user-influenced frame buffers and lengths straight through.

Add the missing length check before frame_body is dereferenced.

Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver")
Cc: stable@vger.kernel.org
Signed-off-by: Muhammad Bilal <meatuni001@gmail.com>
Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/scripts/profile2linkerlist.pl b/scripts/profile2linkerlist.pl
new file mode 100755
index 000000000..316e71918
--- /dev/null
+++ b/scripts/profile2linkerlist.pl
@@ -0,0 +1,20 @@
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
+
+#
+# Takes a (sorted) output of readprofile and turns it into a list suitable for
+# linker scripts
+#
+# usage:
+#	 readprofile | sort -rn | perl profile2linkerlist.pl > functionlist
+#
+use strict;
+
+while (<>) {
+  my $line = $_;
+
+  $_ =~ /\W*[0-9]+\W*([a-zA-Z\_0-9]+)\W*[0-9]+/;
+
+  print "*(.text.$1)\n"
+      unless ($line =~ /unknown/) || ($line =~ /total/);
+}