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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-08-01 18:49:13 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-08-01 18:49:13 -0300 |
| commit | c17c17e8c26a5d44b3a8a6ef8c55233d72eed6c0 (patch) | |
| tree | e41f5b657afcb37c03e1ee03873d30b3d130786b | |
| parent | ee51d851392e1fe3e8be30b3c5847f34da343424 (diff) | |
| download | lwn-c17c17e8c26a5d44b3a8a6ef8c55233d72eed6c0.tar.gz lwn-c17c17e8c26a5d44b3a8a6ef8c55233d72eed6c0.zip | |
perf annotate: Plug filename string leak
If dso__build_id_filename(..., NULL, ...) returns !NULL its because it
allocated it, so, when reaching the 'if (dso__is_kcore()) test, we
already checked that and were just "fallbacking" to using
dso->long_name, but without freeing filename, thus leaking it.
Fix it by adding the dso__is_kcore() test to the 'or' group just after
it, the one containing the full fallback code, including freeing the
filename.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: ee205503f233 ("perf tools: Fix annotation with kcore")
Link: http://lkml.kernel.org/n/tip-qi4rpjq8yo6myvg99kkgt0xz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/annotate.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index 4982ed487e96..4024d309bb00 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -1185,9 +1185,8 @@ int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize) if (dso->has_build_id) return ENOMEM; goto fallback; - } else if (dso__is_kcore(dso)) { - goto fallback; - } else if (readlink(symfs_filename, command, sizeof(command)) < 0 || + } else if (dso__is_kcore(dso) || + readlink(symfs_filename, command, sizeof(command)) < 0 || strstr(command, DSO__NAME_KALLSYMS) || access(symfs_filename, R_OK)) { free(filename); |