files_for_each_reflog_ent_reverse(): close stream and free strbuf on error

Exit the loop orderly through the cleanup code, instead of dashing out
with logfp still open and sb leaking.

Found with Cppcheck.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Reviewed-by: Jeff King <peff@peff.net>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/refs/files-backend.c b/refs/files-backend.c
index c041d4ba21a8fe70eb6d8277358e7e3f29a69bfb..10ba254941e8c4415b1b97950f2f9203840ee114 100644 (file)
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -3169,8 +3169,8 @@ static int files_for_each_reflog_ent_reverse(struct ref_store *ref_store,
 
        /* Jump to the end */
        if (fseek(logfp, 0, SEEK_END) < 0)
-               return error("cannot seek back reflog for %s: %s",
-                            refname, strerror(errno));
+               ret = error("cannot seek back reflog for %s: %s",
+                           refname, strerror(errno));
        pos = ftell(logfp);
        while (!ret && 0 < pos) {
                int cnt;
@@ -3180,13 +3180,17 @@ static int files_for_each_reflog_ent_reverse(struct ref_store *ref_store,
 
                /* Fill next block from the end */
                cnt = (sizeof(buf) < pos) ? sizeof(buf) : pos;
-               if (fseek(logfp, pos - cnt, SEEK_SET))
-                       return error("cannot seek back reflog for %s: %s",
-                                    refname, strerror(errno));
+               if (fseek(logfp, pos - cnt, SEEK_SET)) {
+                       ret = error("cannot seek back reflog for %s: %s",
+                                   refname, strerror(errno));
+                       break;
+               }
                nread = fread(buf, cnt, 1, logfp);
-               if (nread != 1)
-                       return error("cannot read %d bytes from reflog for %s: %s",
-                                    cnt, refname, strerror(errno));
+               if (nread != 1) {
+                       ret = error("cannot read %d bytes from reflog for %s: %s",
+                                   cnt, refname, strerror(errno));
+                       break;
+               }
                pos -= cnt;
 
                scanp = endp = buf + cnt;