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, 18 insertions, 0 deletions

diff --git a/drivers/bcma/Makefile b/drivers/bcma/Makefile
new file mode 100644
index 000000000..f8c37de35
--- /dev/null
+++ b/drivers/bcma/Makefile
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0
+bcma-y					+= main.o scan.o core.o sprom.o
+bcma-y					+= driver_chipcommon.o driver_chipcommon_pmu.o
+bcma-y					+= driver_chipcommon_b.o
+bcma-$(CONFIG_BCMA_PFLASH)		+= driver_chipcommon_pflash.o
+bcma-$(CONFIG_BCMA_SFLASH)		+= driver_chipcommon_sflash.o
+bcma-$(CONFIG_BCMA_NFLASH)		+= driver_chipcommon_nflash.o
+bcma-$(CONFIG_BCMA_DRIVER_PCI)		+= driver_pci.o
+bcma-$(CONFIG_BCMA_DRIVER_PCI)		+= driver_pcie2.o
+bcma-$(CONFIG_BCMA_DRIVER_PCI_HOSTMODE)	+= driver_pci_host.o
+bcma-$(CONFIG_BCMA_DRIVER_MIPS)		+= driver_mips.o
+bcma-$(CONFIG_BCMA_DRIVER_GMAC_CMN)	+= driver_gmac_cmn.o
+bcma-$(CONFIG_BCMA_DRIVER_GPIO)		+= driver_gpio.o
+bcma-$(CONFIG_BCMA_HOST_PCI)		+= host_pci.o
+bcma-$(CONFIG_BCMA_HOST_SOC)		+= host_soc.o
+obj-$(CONFIG_BCMA)			+= bcma.o
+
+ccflags-$(CONFIG_BCMA_DEBUG)		:= -DDEBUG