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Merge pull request #934 from gilles-peskine-arm/mpi-0-mod-2

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Fix null pointer dereference in mpi_mod_int(0, 2)
This commit is contained in:
Dave Rodgman
2022-06-29 15:02:59 +01:00
committed by GitHub
parent 9738a8d0fd 251ca25d94
commit 5b50f38f92
3 changed files with 17 additions and 1 deletions
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2
library/bignum.c
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@ -1785,7 +1785,7 @@ int mbedtls_mpi_mod_int( mbedtls_mpi_uint *r, const mbedtls_mpi *A, mbedtls_mpi_
/*
* handle trivial cases
*/
if( b == 1 )
if( b == 1 || A->n == 0 )
{
*r = 0;
return( 0 );