kbuild: fixdep: Check fstat(2) return value

Coverity has recently added a check that will find when we don't check
the return code from fstat(2).  Copy/paste the checking logic that
print_deps() has with an appropriate re-wording of the perror() message.

Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Michal Marek <mmarek@suse.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 5b327c67a828..caef815d1743 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -274,7 +274,11 @@ static void do_config_file(const char *filename)
                 perror(filename);
                 exit(2);
         }
-        fstat(fd, &st);
+        if (fstat(fd, &st) < 0) {
+                fprintf(stderr, "fixdep: error fstat'ing config file: ");
+                perror(filename);
+                exit(2);
+        }
         if (st.st_size == 0) {
                 close(fd);
                 return;