Commit-ID: ce49d8436cffa9b7a6a5f110879d53e89dbc6746
Gitweb: https://git.kernel.org/tip/ce49d8436cffa9b7a6a5f110879d53e89dbc6746
Author: Sanskriti Sharma <[email protected]>
AuthorDate: Tue, 2 Oct 2018 10:29:10 -0400
Committer: Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Mon, 8 Oct 2018 14:23:44 -0300
perf strbuf: Match va_{add,copy} with va_end
Ensure that all code paths in strbuf_addv() call va_end() on the
ap_saved copy that was made.
Fixes the following coverity complaint:
Error: VARARGS (CWE-237): [#def683]
tools/perf/util/strbuf.c:106: missing_va_end: va_end was not called
for "ap_saved".
Signed-off-by: Sanskriti Sharma <[email protected]>
Reviewed-by: Jiri Olsa <[email protected]>
Cc: Joe Lawrence <[email protected]>
Link:
http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/util/strbuf.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/strbuf.c b/tools/perf/util/strbuf.c
index 3d1cf5bf7f18..9005fbe0780e 100644
--- a/tools/perf/util/strbuf.c
+++ b/tools/perf/util/strbuf.c
@@ -98,19 +98,25 @@ static int strbuf_addv(struct strbuf *sb, const char *fmt,
va_list ap)
va_copy(ap_saved, ap);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
- if (len < 0)
+ if (len < 0) {
+ va_end(ap_saved);
return len;
+ }
if (len > strbuf_avail(sb)) {
ret = strbuf_grow(sb, len);
- if (ret)
+ if (ret) {
+ va_end(ap_saved);
return ret;
+ }
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt,
ap_saved);
va_end(ap_saved);
if (len > strbuf_avail(sb)) {
pr_debug("this should not happen, your vsnprintf is
broken");
+ va_end(ap_saved);
return -EINVAL;
}
}
+ va_end(ap_saved);
return strbuf_setlen(sb, sb->len + len);
}
