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-rw-r--r--revision.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/revision.c b/revision.c
index 7afedc50f..d5e2f1a25 100644
--- a/revision.c
+++ b/revision.c
@@ -1612,8 +1612,10 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
revs->skip_count = atoi(optarg);
return argcount;
} else if ((*arg == '-') && isdigit(arg[1])) {
- /* accept -<digit>, like traditional "head" */
- revs->max_count = atoi(arg + 1);
+ /* accept -<digit>, like traditional "head" */
+ if (strtol_i(arg + 1, 10, &revs->max_count) < 0 ||
+ revs->max_count < 0)
+ die("'%s': not a non-negative integer", arg + 1);
revs->no_walk = 0;
} else if (!strcmp(arg, "-n")) {
if (argc <= 1)