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-rw-r--r--src/basic/hexdecoct.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/basic/hexdecoct.c b/src/basic/hexdecoct.c
index 7748e8352..e402ba82e 100644
--- a/src/basic/hexdecoct.c
+++ b/src/basic/hexdecoct.c
@@ -592,8 +592,7 @@ static int base64_append_width(
_cleanup_free_ char *x = NULL;
char *t, *s;
- ssize_t slen, len, avail;
- int line, lines;
+ ssize_t len, slen, avail, line, lines;
len = base64mem(p, l, &x);
if (len <= 0)
@@ -602,6 +601,9 @@ static int base64_append_width(
lines = DIV_ROUND_UP(len, width);
slen = strlen_ptr(sep);
+ if (lines > (SSIZE_MAX - plen - 1 - slen) / (indent + width + 1))
+ return -ENOMEM;
+
t = realloc(*prefix, plen + 1 + slen + (indent + width + 1) * lines);
if (!t)
return -ENOMEM;