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, 135 insertions, 0 deletions

diff --git a/tools/perf/util/c2c.h b/tools/perf/util/c2c.h
new file mode 100644
index 000000000..53f024e25
--- /dev/null
+++ b/tools/perf/util/c2c.h
@@ -0,0 +1,135 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_UTIL_C2C_H
+#define __PERF_UTIL_C2C_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <linux/types.h>
+#include "hist.h"
+#include "mem-events.h"
+#include "stat.h"
+
+struct sort_entry;
+
+struct c2c_hists {
+	struct hists		hists;
+	struct perf_hpp_list	list;
+	struct c2c_stats	stats;
+};
+
+struct compute_stats {
+	struct stats		 lcl_hitm;
+	struct stats		 rmt_hitm;
+	struct stats		 lcl_peer;
+	struct stats		 rmt_peer;
+	struct stats		 load;
+};
+
+struct c2c_hist_entry {
+	struct c2c_hists	*hists;
+	struct evsel		*evsel;
+	struct c2c_stats	 stats;
+	unsigned long		*cpuset;
+	unsigned long		*nodeset;
+	struct c2c_stats	*node_stats;
+	unsigned int		 cacheline_idx;
+
+	struct compute_stats	 cstats;
+
+	unsigned long		 paddr;
+	unsigned long		 paddr_cnt;
+	bool			 paddr_zero;
+	char			*nodestr;
+
+	/*
+	 * must be at the end,
+	 * because of its callchain dynamic entry
+	 */
+	struct hist_entry	he;
+};
+
+#define C2C_HEADER_MAX 2
+
+struct c2c_header {
+	struct {
+		const char *text;
+		int	    span;
+	} line[C2C_HEADER_MAX];
+};
+
+struct c2c_dimension {
+	struct c2c_header	 header;
+	const char		*name;
+	int			 width;
+	struct sort_entry	*se;
+
+	int64_t (*cmp)(struct perf_hpp_fmt *fmt,
+		       struct hist_entry *left, struct hist_entry *right);
+	int   (*entry)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+		       struct hist_entry *he);
+	int   (*color)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+		       struct hist_entry *he);
+};
+
+struct c2c_fmt {
+	struct perf_hpp_fmt	 fmt;
+	struct c2c_dimension	*dim;
+};
+
+#define SYMBOL_WIDTH 30
+
+#define HEADER_LOW(__h)			\
+	{				\
+		.line[1] = {		\
+			.text = __h,	\
+		},			\
+	}
+
+#define HEADER_BOTH(__h0, __h1)		\
+	{				\
+		.line[0] = {		\
+			.text = __h0,	\
+		},			\
+		.line[1] = {		\
+			.text = __h1,	\
+		},			\
+	}
+
+void c2c_fmt_free(struct perf_hpp_fmt *fmt);
+bool c2c_fmt_equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b);
+
+/*
+ * Build the function-view hierarchy. Returns -EOPNOTSUPP when @cl_sort lacks
+ * iaddr. On success, *@hists remains valid until the next
+ * c2c_function__build() or c2c_function__reset(). On failure, *@hists is
+ * NULL.
+ */
+int c2c_function__build(struct c2c_hists *cl_hists, const char *cl_sort,
+			bool symbol_full, struct hists **hists);
+void c2c_function__reset(void);
+/* Valid only between a successful build and c2c_function__reset(). */
+struct hist_entry *c2c_function__find_cacheline(struct hist_entry *he);
+
+/* Inputs and TUI callback supplied by the c2c command. */
+struct c2c_function_view_args {
+	/* Source cacheline histograms used by the common model. */
+	struct c2c_hists	*cl_hists;
+	/* --coalesce field list, used to require iaddr. */
+	const char		*cl_sort;
+	/* Do not cap long symbol names. */
+	bool			 symbol_full;
+	/* Open the cacheline detail view for @he. */
+	int			(*browse_cacheline)(struct hist_entry *he);
+};
+
+#ifdef HAVE_SLANG_SUPPORT
+int perf_c2c__browse_function_view(struct c2c_function_view_args *args);
+#else
+static inline int
+perf_c2c__browse_function_view(struct c2c_function_view_args *args __maybe_unused)
+{
+	return 0;
+}
+#endif
+
+#endif /* __PERF_UTIL_C2C_H */