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https://bugs.gentoo.org/823804
https://gmplib.org/repo/gmp-6.2/rev/561a9c25298e
--- a/mpz/inp_raw.c
+++ b/mpz/inp_raw.c
@@ -88,8 +88,11 @@ mpz_inp_raw (mpz_ptr x, FILE *fp)
abs_csize = ABS (csize);
+ if (UNLIKELY (abs_csize > ~(mp_bitcnt_t) 0 / 8))
+ return 0; /* Bit size overflows */
+
/* round up to a multiple of limbs */
- abs_xsize = BITS_TO_LIMBS (abs_csize*8);
+ abs_xsize = BITS_TO_LIMBS ((mp_bitcnt_t) abs_csize * 8);
if (abs_xsize != 0)
{
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