From ff917923f4fb9c83717ba135ee47d7e4c1567bb7 Mon Sep 17 00:00:00 2001 From: Muhammad Bilal Date: Tue, 28 Jul 2026 17:54:55 +0500 Subject: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() 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 Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com Signed-off-by: Greg Kroah-Hartman --- tools/perf/tests/pfm.c | 195 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 tools/perf/tests/pfm.c (limited to 'tools/perf/tests/pfm.c') diff --git a/tools/perf/tests/pfm.c b/tools/perf/tests/pfm.c new file mode 100644 index 000000000..f7bf55be5 --- /dev/null +++ b/tools/perf/tests/pfm.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test support for libpfm4 event encodings. + * + * Copyright 2020 Google LLC. + */ +#include +#include "tests.h" +#include "util/debug.h" +#include "util/evlist.h" +#include "util/pfm.h" + +#include + +#ifdef HAVE_LIBPFM +static int count_pfm_events(struct perf_evlist *evlist) +{ + struct perf_evsel *evsel; + int count = 0; + + perf_evlist__for_each_entry(evlist, evsel) { + count++; + } + return count; +} + +static int test__pfm_events(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + struct evlist *evlist; + struct option opt; + size_t i; + const struct { + const char *events; + int nr_events; + } table[] = { + { + .events = "", + .nr_events = 0, + }, + { + .events = "instructions", + .nr_events = 1, + }, + { + .events = "instructions,cycles", + .nr_events = 2, + }, + { + .events = "stereolab", + .nr_events = 0, + }, + { + .events = "instructions,instructions", + .nr_events = 2, + }, + { + .events = "stereolab,instructions", + .nr_events = 0, + }, + { + .events = "instructions,stereolab", + .nr_events = 1, + }, + }; + + for (i = 0; i < ARRAY_SIZE(table); i++) { + evlist = evlist__new(); + if (evlist == NULL) + return -ENOMEM; + + opt.value = &evlist; + parse_libpfm_events_option(&opt, + table[i].events, + 0); + TEST_ASSERT_EQUAL(table[i].events, + count_pfm_events(evlist__core(evlist)), + table[i].nr_events); + TEST_ASSERT_EQUAL(table[i].events, + evlist__nr_groups(evlist), + 0); + + evlist__put(evlist); + } + return 0; +} + +static int test__pfm_group(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + struct evlist *evlist; + struct option opt; + size_t i; + const struct { + const char *events; + int nr_events; + int nr_groups; + } table[] = { + { + .events = "{},", + .nr_events = 0, + .nr_groups = 0, + }, + { + .events = "{instructions}", + .nr_events = 1, + .nr_groups = 0, + }, + { + .events = "{instructions},{}", + .nr_events = 1, + .nr_groups = 0, + }, + { + .events = "{},{instructions}", + .nr_events = 1, + .nr_groups = 0, + }, + { + .events = "{instructions},{instructions}", + .nr_events = 2, + .nr_groups = 0, + }, + { + .events = "{instructions,cycles},{instructions,cycles}", + .nr_events = 4, + .nr_groups = 2, + }, + { + .events = "{stereolab}", + .nr_events = 0, + .nr_groups = 0, + }, + { + .events = + "{instructions,cycles},{instructions,stereolab}", + .nr_events = 3, + .nr_groups = 1, + }, + { + .events = "instructions}", + .nr_events = 1, + .nr_groups = 0, + }, + { + .events = "{{instructions}}", + .nr_events = 0, + .nr_groups = 0, + }, + }; + + for (i = 0; i < ARRAY_SIZE(table); i++) { + evlist = evlist__new(); + if (evlist == NULL) + return -ENOMEM; + + opt.value = &evlist; + parse_libpfm_events_option(&opt, + table[i].events, + 0); + TEST_ASSERT_EQUAL(table[i].events, + count_pfm_events(evlist__core(evlist)), + table[i].nr_events); + TEST_ASSERT_EQUAL(table[i].events, + evlist__nr_groups(evlist), + table[i].nr_groups); + + evlist__put(evlist); + } + return 0; +} +#else +static int test__pfm_events(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + return TEST_SKIP; +} + +static int test__pfm_group(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + return TEST_SKIP; +} +#endif + +static struct test_case pfm_tests[] = { + TEST_CASE_REASON("test of individual --pfm-events", pfm_events, "not compiled in"), + TEST_CASE_REASON("test groups of --pfm-events", pfm_group, "not compiled in"), + { .name = NULL, } +}; + +struct test_suite suite__pfm = { + .desc = "Test libpfm4 support", + .test_cases = pfm_tests, +}; -- cgit v1.3.1