musl - musl - an implementation of the standard library for Linux-based systems

diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index a68edabb..514a44dd 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c

@@ -182,7 +182,9 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t, int ps)

{

int max_mant_dig = (ps==BIGLPRE) ? LDBL_MANT_DIG : DBL_MANT_DIG;

int max_exp = (ps==BIGLPRE) ? LDBL_MAX_EXP : DBL_MAX_EXP;

- int max_mant_slots = (max_mant_dig+28)/29 + 1;

+ /* One slot for 29 bits left of radix point, a slot for every 29-21=8

+ * bits right of the radix point, and one final zero slot. */

+ int max_mant_slots = 1 + (max_mant_dig-29+7)/8 + 1;

int max_exp_slots = (max_exp+max_mant_dig+28+8)/9;

int bufsize = max_mant_slots + max_exp_slots;

uint32_t big[bufsize];