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| author | Han Pingtian <phan@redhat.com> | 2011-07-18 11:13:14 +0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-07-22 08:59:26 -0300 |
| commit | 4f9bae351d299149a84f76cd34bf0150614e8c8e (patch) | |
| tree | 342086b25b25b3074cf3d91b2568957b5baf668d | |
| parent | 7fcfd1abd6480d3b9ef17f5759c175e036e835cf (diff) | |
| download | linux-4f9bae351d299149a84f76cd34bf0150614e8c8e.tar.bz2 | |
perf buildid-cache: Zero out buffer of filenames when adding/removing buildid
The readlink() function doesn't append a null byte to buf. So we should
zero out buf with zalloc(). Or we'll see sometimes error like this:
[root@intel-s3e36-01]~# /usr/bin/perf buildid-cache -a /lib/modules/2.6.32-130.el6.x86_64/kernel/crypto/twofish_common.ko -v
Adding f64ba8efd5f53c7ad332fc17db1d21de309038e1 /lib/modules/2.6.32-130.el6.x86_64/kernel/crypto/twofish_common.ko: Ok
[root@intel-s3e36-01]~# /usr/bin/perf buildid-cache -r /lib/modules/2.6.32-130.el6.x86_64/kernel/crypto/twofish_common.ko -v
Removing f64ba8efd5f53c7ad332fc17db1d21de309038e1 /lib/modules/2.6.32-130.el6.x86_64/kernel/crypto/twofish_common.ko: FAIL
/lib/modules/2.6.32-130.el6.x86_64/kernel/crypto/twofish_common.ko wasn't in the cache
The change in build_id_cache__add_s() is a defense.
Tested-by: Jiri Olsa <jolsa@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20110718031314.GA5802@hpt.nay.redhat.com
Signed-off-by: Han Pingtian <phan@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/header.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index cb2959a3fb43..d4f3101773db 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -189,8 +189,8 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, const char *name, bool is_kallsyms) { const size_t size = PATH_MAX; - char *realname, *filename = malloc(size), - *linkname = malloc(size), *targetname; + char *realname, *filename = zalloc(size), + *linkname = zalloc(size), *targetname; int len, err = -1; if (is_kallsyms) { @@ -254,8 +254,8 @@ static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size, int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir) { const size_t size = PATH_MAX; - char *filename = malloc(size), - *linkname = malloc(size); + char *filename = zalloc(size), + *linkname = zalloc(size); int err = -1; if (filename == NULL || linkname == NULL) |