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| author |   Thomas Richter <tmricht@linux.vnet.ibm.com> | 2018-01-17 14:16:11 +0100 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-01-17 10:31:25 -0300 |
| commit | 81fccd6ca507d3b2012eaf1edeb9b1dbf4bd22db (patch) | |
| tree | cc3442e78f7b96b5c54ad85c088677496d596c95 /tools/perf/arch/x86 | |
| parent | perf script: Remove the time slices number limitation (diff) | |
| download | linux-dev-81fccd6ca507d3b2012eaf1edeb9b1dbf4bd22db.tar.xz linux-dev-81fccd6ca507d3b2012eaf1edeb9b1dbf4bd22db.zip | |
perf record: Fix failed memory allocation for get_cpuid_str
In x86 architecture dependend part function get_cpuid_str() mallocs a
128 byte buffer, but does not check if the memory allocation succeeded
or not.
When the memory allocation fails, function __get_cpuid() is called with
first parameter being a NULL pointer. However this function references
its first parameter and operates on a NULL pointer which might cause
core dumps.
Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180117131611.34319-1-tmricht@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch/x86')
| -rw-r--r-- | tools/perf/arch/x86/util/header.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c index b626d2bad9f1..fb0d71afee8b 100644 --- a/tools/perf/arch/x86/util/header.c +++ b/tools/perf/arch/x86/util/header.c @@ -70,7 +70,7 @@ get_cpuid_str(struct perf_pmu *pmu __maybe_unused) { char *buf = malloc(128); - if (__get_cpuid(buf, 128, "%s-%u-%X$") < 0) { + if (buf && __get_cpuid(buf, 128, "%s-%u-%X$") < 0) { free(buf); return NULL; } |