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| author | Colin Ian King <colin.king@canonical.com> | 2016-08-12 22:44:56 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-08-15 17:06:19 -0300 |
| commit | 0325862dc364d8af524bf2db53ef4360ed55b989 (patch) | |
| tree | 4c307fc74ea114e1a97b78bb6365a6f61ca51e2f /tools | |
| parent | 50de1a0c54cdbc69a6dbcbc323f53daf95a4050e (diff) | |
| download | linux-0325862dc364d8af524bf2db53ef4360ed55b989.tar.gz linux-0325862dc364d8af524bf2db53ef4360ed55b989.tar.bz2 linux-0325862dc364d8af524bf2db53ef4360ed55b989.zip | |
perf probe: Check for dup and fdopen failures
dup and fdopen can potentially fail, so add some extra
error handling checks rather than assuming they always work.
Signed-off-by: Colin King <colin.king@canonical.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1471038296-12956-1-git-send-email-colin.king@canonical.com
[ Free resources when those functions (now being verified) fail ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/probe-file.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c index 9aed9c332da6..a8e76233c088 100644 --- a/tools/perf/util/probe-file.c +++ b/tools/perf/util/probe-file.c @@ -133,7 +133,7 @@ int probe_file__open_both(int *kfd, int *ufd, int flag) /* Get raw string list of current kprobe_events or uprobe_events */ struct strlist *probe_file__get_rawlist(int fd) { - int ret, idx; + int ret, idx, fddup; FILE *fp; char buf[MAX_CMDLEN]; char *p; @@ -144,7 +144,14 @@ struct strlist *probe_file__get_rawlist(int fd) sl = strlist__new(NULL, NULL); - fp = fdopen(dup(fd), "r"); + fddup = dup(fd); + if (fddup < 0) + goto out_free_sl; + + fp = fdopen(fddup, "r"); + if (!fp) + goto out_close_fddup; + while (!feof(fp)) { p = fgets(buf, MAX_CMDLEN, fp); if (!p) @@ -163,6 +170,12 @@ struct strlist *probe_file__get_rawlist(int fd) fclose(fp); return sl; + +out_close_fddup: + close(fddup); +out_free_sl: + strlist__delete(sl); + return NULL; } static struct strlist *__probe_file__get_namelist(int fd, bool include_group) @@ -447,10 +460,13 @@ static int probe_cache__load(struct probe_cache *pcache) { struct probe_cache_entry *entry = NULL; char buf[MAX_CMDLEN], *p; - int ret = 0; + int ret = 0, fddup; FILE *fp; - fp = fdopen(dup(pcache->fd), "r"); + fddup = dup(pcache->fd); + if (fddup < 0) + return -errno; + fp = fdopen(fddup, "r"); if (!fp) return -EINVAL; |