From 262aa008e735ce6b02469a68f8aedf83e18b3c44 Mon Sep 17 00:00:00 2001 From: npt-1707 Date: Sat, 3 May 2025 01:23:12 +0800 Subject: [PATCH] extern/hunspell/intl/vasnprintf:.c Fix heap memory overrun bug. --- extern/hunspell/intl/vasnprintf.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/extern/hunspell/intl/vasnprintf.c b/extern/hunspell/intl/vasnprintf.c index 4a8e7f05..65ade714 100644 --- a/extern/hunspell/intl/vasnprintf.c +++ b/extern/hunspell/intl/vasnprintf.c @@ -758,7 +758,9 @@ convert_to_decimal (mpn_t a, size_t extra_zeroes) size_t a_len = a.nlimbs; /* 0.03345 is slightly larger than log(2)/(9*log(10)). */ size_t c_len = 9 * ((size_t)(a_len * (GMP_LIMB_BITS * 0.03345f)) + 1); - char *c_ptr = (char *) malloc (xsum (c_len, extra_zeroes)); + /* We need extra_zeroes bytes for zeroes, followed by c_len bytes for the + digits of a, followed by 1 byte for the terminating NUL. */ + char *c_ptr = (char *) malloc (xsum (xsum (extra_zeroes, c_len), 1)); if (c_ptr != NULL) { char *d_ptr = c_ptr;