From 096972f5588dbac741f7f0cc057c84d895d4d80f Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Tue, 1 Feb 2022 15:39:03 -0600 Subject: libperf: Fix 32-bit build for tests uint64_t printf MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit a7f3713f6bf207e6 ("libperf tests: Add test_stat_multiplexing test") added printf's of 64-bit ints using %lu which doesn't work on 32-bit builds: tests/test-evlist.c:529:29: error: format ‘%lu’ expects argument of type \ ‘long unsigned int’, but argument 4 has type ‘uint64_t’ {aka ‘long long unsigned int’} [-Werror=format=] Use PRIu64 instead which works on both 32-bit and 64-bit systems. Fixes: a7f3713f6bf207e6 ("libperf tests: Add test_stat_multiplexing test") Signed-off-by: Rob Herring Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Shunsuke Nakamura Link: https://lore.kernel.org/r/20220201213903.699656-1-robh@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/perf/tests/test-evlist.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'tools/lib') diff --git a/tools/lib/perf/tests/test-evlist.c b/tools/lib/perf/tests/test-evlist.c index b3479dfa9a1c..fa854c83b7e7 100644 --- a/tools/lib/perf/tests/test-evlist.c +++ b/tools/lib/perf/tests/test-evlist.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #define _GNU_SOURCE // needed for sched.h to get sched_[gs]etaffinity and CPU_(ZERO,SET) +#include #include #include #include @@ -526,12 +527,12 @@ static int test_stat_multiplexing(void) min = counts[0].val; for (i = 0; i < EVENT_NUM; i++) { - __T_VERBOSE("Event %2d -- Raw count = %lu, run = %lu, enable = %lu\n", + __T_VERBOSE("Event %2d -- Raw count = %" PRIu64 ", run = %" PRIu64 ", enable = %" PRIu64 "\n", i, counts[i].val, counts[i].run, counts[i].ena); perf_counts_values__scale(&counts[i], true, &scaled); if (scaled == 1) { - __T_VERBOSE("\t Scaled count = %lu (%.2lf%%, %lu/%lu)\n", + __T_VERBOSE("\t Scaled count = %" PRIu64 " (%.2lf%%, %" PRIu64 "/%" PRIu64 ")\n", counts[i].val, (double)counts[i].run / (double)counts[i].ena * 100.0, counts[i].run, counts[i].ena); -- cgit From 30d1c4d947983f3cfbff9cbb7a4d69b05b699678 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Tue, 15 Feb 2022 16:37:13 +0100 Subject: libperf: Fix perf_cpu_map__for_each_cpu macro Tzvetomir Stoyanov reported an issue with using macro perf_cpu_map__for_each_cpu using private perf_cpu object. The issue is caused by recent change that wrapped cpu in struct perf_cpu to distinguish it from cpu indexes. We need to make struct perf_cpu public. Add a simple test for using the perf_cpu_map__for_each_cpu macro. Fixes: 6d18804b963b78dc ("perf cpumap: Give CPUs their own type") Reported-by: Tzvetomir Stoyanov (VMware) Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Ian Rogers Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20220215153713.31395-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/perf/include/internal/cpumap.h | 6 +----- tools/lib/perf/include/perf/cpumap.h | 5 +++++ tools/lib/perf/libperf.map | 1 + tools/lib/perf/tests/test-cpumap.c | 11 +++++++++++ 4 files changed, 18 insertions(+), 5 deletions(-) (limited to 'tools/lib') diff --git a/tools/lib/perf/include/internal/cpumap.h b/tools/lib/perf/include/internal/cpumap.h index 581f9ffb4237..1973a18c096b 100644 --- a/tools/lib/perf/include/internal/cpumap.h +++ b/tools/lib/perf/include/internal/cpumap.h @@ -3,11 +3,7 @@ #define __LIBPERF_INTERNAL_CPUMAP_H #include - -/** A wrapper around a CPU to avoid confusion with the perf_cpu_map's map's indices. */ -struct perf_cpu { - int cpu; -}; +#include /** * A sized, reference counted, sorted array of integers representing CPU diff --git a/tools/lib/perf/include/perf/cpumap.h b/tools/lib/perf/include/perf/cpumap.h index 15b8faafd615..4a2edbdb5e2b 100644 --- a/tools/lib/perf/include/perf/cpumap.h +++ b/tools/lib/perf/include/perf/cpumap.h @@ -7,6 +7,11 @@ #include #include +/** A wrapper around a CPU to avoid confusion with the perf_cpu_map's map's indices. */ +struct perf_cpu { + int cpu; +}; + LIBPERF_API struct perf_cpu_map *perf_cpu_map__dummy_new(void); LIBPERF_API struct perf_cpu_map *perf_cpu_map__default_new(void); LIBPERF_API struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list); diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map index 93696affda2e..6fa0d651576b 100644 --- a/tools/lib/perf/libperf.map +++ b/tools/lib/perf/libperf.map @@ -2,6 +2,7 @@ LIBPERF_0.0.1 { global: libperf_init; perf_cpu_map__dummy_new; + perf_cpu_map__default_new; perf_cpu_map__get; perf_cpu_map__put; perf_cpu_map__new; diff --git a/tools/lib/perf/tests/test-cpumap.c b/tools/lib/perf/tests/test-cpumap.c index d39378eaf897..87b0510a556f 100644 --- a/tools/lib/perf/tests/test-cpumap.c +++ b/tools/lib/perf/tests/test-cpumap.c @@ -14,6 +14,8 @@ static int libperf_print(enum libperf_print_level level, int test_cpumap(int argc, char **argv) { struct perf_cpu_map *cpus; + struct perf_cpu cpu; + int idx; __T_START; @@ -27,6 +29,15 @@ int test_cpumap(int argc, char **argv) perf_cpu_map__put(cpus); perf_cpu_map__put(cpus); + cpus = perf_cpu_map__default_new(); + if (!cpus) + return -1; + + perf_cpu_map__for_each_cpu(cpu, idx, cpus) + __T("wrong cpu number", cpu.cpu != -1); + + perf_cpu_map__put(cpus); + __T_END; return tests_failed == 0 ? 0 : -1; } -- cgit From 52a9dab6d892763b2a8334a568bd4e2c1a6fde66 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Sun, 13 Feb 2022 10:24:43 -0800 Subject: libsubcmd: Fix use-after-free for realloc(..., 0) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit GCC 12 correctly reports a potential use-after-free condition in the xrealloc helper. Fix the warning by avoiding an implicit "free(ptr)" when size == 0: In file included from help.c:12: In function 'xrealloc', inlined from 'add_cmdname' at help.c:24:2: subcmd-util.h:56:23: error: pointer may be used after 'realloc' [-Werror=use-after-free] 56 | ret = realloc(ptr, size); | ^~~~~~~~~~~~~~~~~~ subcmd-util.h:52:21: note: call to 'realloc' here 52 | void *ret = realloc(ptr, size); | ^~~~~~~~~~~~~~~~~~ subcmd-util.h:58:31: error: pointer may be used after 'realloc' [-Werror=use-after-free] 58 | ret = realloc(ptr, 1); | ^~~~~~~~~~~~~~~ subcmd-util.h:52:21: note: call to 'realloc' here 52 | void *ret = realloc(ptr, size); | ^~~~~~~~~~~~~~~~~~ Fixes: 2f4ce5ec1d447beb ("perf tools: Finalize subcmd independence") Reported-by: Valdis Klētnieks Signed-off-by: Kees Kook Tested-by: Valdis Klētnieks Tested-by: Justin M. Forbes Acked-by: Josh Poimboeuf Cc: linux-hardening@vger.kernel.org Cc: Valdis Klētnieks Link: http://lore.kernel.org/lkml/20220213182443.4037039-1-keescook@chromium.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/subcmd/subcmd-util.h | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) (limited to 'tools/lib') diff --git a/tools/lib/subcmd/subcmd-util.h b/tools/lib/subcmd/subcmd-util.h index 794a375dad36..b2aec04fce8f 100644 --- a/tools/lib/subcmd/subcmd-util.h +++ b/tools/lib/subcmd/subcmd-util.h @@ -50,15 +50,8 @@ static NORETURN inline void die(const char *err, ...) static inline void *xrealloc(void *ptr, size_t size) { void *ret = realloc(ptr, size); - if (!ret && !size) - ret = realloc(ptr, 1); - if (!ret) { - ret = realloc(ptr, size); - if (!ret && !size) - ret = realloc(ptr, 1); - if (!ret) - die("Out of memory, realloc failed"); - } + if (!ret) + die("Out of memory, realloc failed"); return ret; } -- cgit