| Message ID | 20240607160542.46152-5-jmarchan@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | libtraceevent: fix misc issues found by static analysis | expand |
On Fri, 7 Jun 2024 18:05:42 +0200 "Jerome Marchand" <jmarchan@redhat.com> wrote: > The function get_field_str() can return a pointer to string on the > stack. Replace it by a global variable. > > Fixes a RETURN_LOCAL error (CWE-562) > > Signed-off-by: Jerome Marchand <jmarchan@redhat.com> > --- > src/parse-filter.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/src/parse-filter.c b/src/parse-filter.c > index e448ee2..f0c0ae1 100644 > --- a/src/parse-filter.c > +++ b/src/parse-filter.c > @@ -1698,6 +1698,8 @@ static int test_num(struct tep_event *event, struct tep_filter_arg *arg, > } > } > > +char hex[64]; > + > static const char *get_field_str(struct tep_filter_arg *arg, struct tep_record *record) > { > struct tep_event *event; > @@ -1705,7 +1707,6 @@ static const char *get_field_str(struct tep_filter_arg *arg, struct tep_record * > unsigned long long addr; > const char *val = NULL; > unsigned int size; > - char hex[64]; Instead of making hex a global variable (which is incorrect for multiple reasons, and can caus bugs elsewhere). Just make it a static variable here. static char hex[64]; I'll fix this and give you a reported-by. -- Steve > > /* If the field is not a string convert it */ > if (arg->str.field->flags & TEP_FIELD_IS_STRING) {
diff --git a/src/parse-filter.c b/src/parse-filter.c index e448ee2..f0c0ae1 100644 --- a/src/parse-filter.c +++ b/src/parse-filter.c @@ -1698,6 +1698,8 @@ static int test_num(struct tep_event *event, struct tep_filter_arg *arg, } } +char hex[64]; + static const char *get_field_str(struct tep_filter_arg *arg, struct tep_record *record) { struct tep_event *event; @@ -1705,7 +1707,6 @@ static const char *get_field_str(struct tep_filter_arg *arg, struct tep_record * unsigned long long addr; const char *val = NULL; unsigned int size; - char hex[64]; /* If the field is not a string convert it */ if (arg->str.field->flags & TEP_FIELD_IS_STRING) {
The function get_field_str() can return a pointer to string on the stack. Replace it by a global variable. Fixes a RETURN_LOCAL error (CWE-562) Signed-off-by: Jerome Marchand <jmarchan@redhat.com> --- src/parse-filter.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)