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-rw-r--r--git-compat-util.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/git-compat-util.h b/git-compat-util.h
index f649e81f1..1df82fa59 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -814,6 +814,9 @@ static inline int strtoul_ui(char const *s, int base, unsigned int *result)
char *p;
errno = 0;
+ /* negative values would be accepted by strtoul */
+ if (strchr(s, '-'))
+ return -1;
ul = strtoul(s, &p, base);
if (errno || *p || p == s || (unsigned int) ul != ul)
return -1;