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.

[ Linux commit : 46fe94ad18aa7ce6b3dad8c035fb538942020f2b ]

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

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index e8e8c7756deb09e00ec7cb48e3dd0ad628e3c6cc..9bd0de2490748730e750dbf8797a3ae19c431c95 100644 (file)
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -296,7 +296,11 @@ 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;