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, 60 insertions, 0 deletions

diff --git a/drivers/accessibility/speakup/Makefile b/drivers/accessibility/speakup/Makefile
new file mode 100644
index 000000000..14ba1cca8
--- /dev/null
+++ b/drivers/accessibility/speakup/Makefile
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_SPEAKUP_SYNTH_ACNTSA) += speakup_acntsa.o
+obj-$(CONFIG_SPEAKUP_SYNTH_ACNTPC) += speakup_acntpc.o
+obj-$(CONFIG_SPEAKUP_SYNTH_APOLLO) += speakup_apollo.o
+obj-$(CONFIG_SPEAKUP_SYNTH_AUDPTR) += speakup_audptr.o
+obj-$(CONFIG_SPEAKUP_SYNTH_BNS) += speakup_bns.o
+obj-$(CONFIG_SPEAKUP_SYNTH_DECTLK) += speakup_dectlk.o
+obj-$(CONFIG_SPEAKUP_SYNTH_DECEXT) += speakup_decext.o
+obj-$(CONFIG_SPEAKUP_SYNTH_DECPC) += speakup_decpc.o
+obj-$(CONFIG_SPEAKUP_SYNTH_DTLK) += speakup_dtlk.o
+obj-$(CONFIG_SPEAKUP_SYNTH_KEYPC) += speakup_keypc.o
+obj-$(CONFIG_SPEAKUP_SYNTH_LTLK) += speakup_ltlk.o
+obj-$(CONFIG_SPEAKUP_SYNTH_SOFT) += speakup_soft.o
+obj-$(CONFIG_SPEAKUP_SYNTH_SPKOUT) += speakup_spkout.o
+obj-$(CONFIG_SPEAKUP_SYNTH_TXPRT) += speakup_txprt.o
+obj-$(CONFIG_SPEAKUP_SYNTH_DUMMY) += speakup_dummy.o
+
+obj-$(CONFIG_SPEAKUP) += speakup.o
+speakup-y := \
+	buffers.o \
+	devsynth.o \
+	i18n.o \
+	fakekey.o \
+	main.o \
+	keyhelp.o \
+	kobjects.o \
+	selection.o \
+	spk_ttyio.o \
+	synth.o \
+	thread.o \
+	varhandlers.o
+speakup-$(CONFIG_SPEAKUP_SERIALIO) += serialio.o
+
+
+clean-files := mapdata.h speakupmap.h
+
+
+# Generate mapdata.h from headers
+hostprogs += makemapdata
+makemapdata-objs := makemapdata.o
+
+quiet_cmd_mkmap = MKMAP   $@
+      cmd_mkmap = TOPDIR=$(srctree) SPKDIR=$(src) $(obj)/makemapdata > $@
+
+$(obj)/mapdata.h: $(obj)/makemapdata
+	$(call cmd,mkmap)
+
+
+# Generate speakupmap.h from mapdata.h
+hostprogs += genmap
+genmap-objs := genmap.o
+$(obj)/genmap.o: $(obj)/mapdata.h
+
+quiet_cmd_genmap = GENMAP  $@
+      cmd_genmap = $(obj)/genmap $< > $@
+
+$(obj)/speakupmap.h: $(src)/speakupmap.map $(obj)/genmap
+	$(call cmd,genmap)
+
+$(obj)/main.o: $(obj)/speakupmap.h