[PATCH] config.c: handle error case for fstat() calls

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 Will this fix the problem I'm replying to? I don't know. I found this
 while checking the code and it should be fixed regardless.

 config.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/config.c b/config.c
index 83fdecb..4973256 100644
--- a/config.c
+++ b/config.c
@@ -2194,7 +2194,12 @@ int git_config_set_multivar_in_file_gently(const char 
*config_filename,
                        goto out_free;
                }
 
-               fstat(in_fd, &st);
+               if (fstat(in_fd, &st) == -1) {
+                       error_errno(_("fstat on %s failed"), config_filename);
+                       ret = CONFIG_INVALID_FILE;
+                       goto out_free;
+               }
+
                contents_sz = xsize_t(st.st_size);
                contents = xmmap_gently(NULL, contents_sz, PROT_READ,
                                        MAP_PRIVATE, in_fd, 0);
@@ -2414,7 +2419,10 @@ int git_config_rename_section_in_file(const char 
*config_filename,
                goto unlock_and_out;
        }
 
-       fstat(fileno(config_file), &st);
+       if (fstat(fileno(config_file), &st) == -1) {
+               ret = error_errno(_("fstat on %s failed"), config_filename);
+               goto out;
+       }
 
        if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
                ret = error_errno("chmod on %s failed",
-- 
2.8.2.524.g6ff3d78