diff options
| author | Thomas Richter <tmricht@linux.vnet.ibm.com> | 2018-01-17 14:16:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-30 07:50:20 +0200 |
| commit | 7b0f8d7f54ff9e6638b7faee9501560065987d80 (patch) | |
| tree | c31098e3f5f02e4e977d497f9a2311520347a800 /tools/perf/arch | |
| parent | d23d7b03fd9abdb635e815e86843d52a18ca3278 (diff) | |
perf record: Fix failed memory allocation for get_cpuid_str
[ Upstream commit 81fccd6ca507d3b2012eaf1edeb9b1dbf4bd22db ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/arch')
| -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 a74a48db26f5..2eb11543e2e9 100644 --- a/tools/perf/arch/x86/util/header.c +++ b/tools/perf/arch/x86/util/header.c @@ -69,7 +69,7 @@ get_cpuid_str(void) { 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; } |