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, 46 insertions, 0 deletions

diff --git a/drivers/accessibility/speakup/DefaultKeyAssignments b/drivers/accessibility/speakup/DefaultKeyAssignments
new file mode 100644
index 000000000..101c803b2
--- /dev/null
+++ b/drivers/accessibility/speakup/DefaultKeyAssignments
@@ -0,0 +1,46 @@
+This file is intended to give you an overview of the default keys used
+by speakup for it's review functions.  You may change them to be
+anything you want but that will take some familiarity with key
+mapping.
+
+We have remapped the insert or zero key on the keypad to act as a
+shift key.  Well, actually as an altgr key.  So in the following list
+InsKeyPad-period means hold down the insert key like a shift key and
+hit the keypad period.
+
+KeyPad-8		Say current Line
+InsKeyPad-8		say from top of screen to reading cursor.
+KeyPad-7		Say Previous Line (UP one line)
+KeyPad-9		Say Next Line (down one line)
+KeyPad-5		Say Current Word
+InsKeyPad-5		Spell Current Word
+KeyPad-4		Say Previous Word (left one word)
+InsKeyPad-4		say from left edge of line to reading cursor.
+KeyPad-6		Say Next Word (right one word)
+InsKeyPad-6		Say from reading cursor to right edge of line.
+KeyPad-2		Say Current Letter
+InsKeyPad-2		say current letter phonetically
+KeyPad-1		Say Previous Character (left one letter)
+KeyPad-3		Say Next Character (right one letter)
+KeyPad-plus		Say Entire Screen
+InsKeyPad-plus		Say from reading cursor line to bottom of screen.
+KeyPad-Minus		Park reading cursor (toggle)
+InsKeyPad-minus		Say character hex and decimal value.
+KeyPad-period		Say Position (current line, position and console)
+InsKeyPad-period	say colour attributes of current position.
+InsKeyPad-9		Move reading cursor to top of screen (insert pgup)
+InsKeyPad-3		Move reading cursor to bottom of screen (insert pgdn)
+InsKeyPad-7		Move reading cursor to left edge of screen (insert home)
+InsKeyPad-1		Move reading cursor to right edge of screen (insert end)
+ControlKeyPad-1		Move reading cursor to last character on current line.
+KeyPad-Enter		Shut Up (until another key is hit) and sync reading cursor
+InsKeyPad-Enter		Shut Up (until toggled back on).
+InsKeyPad-star n<x|y>	go to line (y) or column (x). Where 'n' is any
+		allowed value for the row or column for your current screen.
+KeyPad-/		Mark and Cut screen region.
+InsKeyPad-/		Paste screen region into any console.
+
+Hitting any key while speakup is outputting speech will quiet the
+synth until it has caught up with what is being printed on the
+console.
+