yuzu-emu/mbedtls
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Do not read if output pointer is NULL

Browse source 
Skip reading if output pointer is NULL even if the length of the input buffer is 0.
The memory sanitizer will mark this as an error.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
This commit is contained in:
Gabor Mezei 2022-08-12 14:11:56 +02:00
parent 6318468183
commit bf9da1dfb1
No known key found for this signature in database
GPG key ID: F072ACA227ACD71D
1 changed files with 14 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
library/bignum_core.c
View file

@ -171,10 +171,12 @@ int mbedtls_mpi_core_read_le( mbedtls_mpi_uint *X,
return( MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL );
if( X != NULL )
{
memset( X, 0, nx * ciL );
for( i = 0; i < buflen; i++ )
X[i / ciL] |= ((mbedtls_mpi_uint) buf[i]) << ((i % ciL) << 3);
for( i = 0; i < buflen; i++ )
X[i / ciL] |= ((mbedtls_mpi_uint) buf[i]) << ((i % ciL) << 3);
}
return( 0 );
}
@ -192,18 +194,20 @@ int mbedtls_mpi_core_read_be( mbedtls_mpi_uint *X,
return( MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL );
if( X != NULL )
{
memset( X, 0, nx * ciL );
overhead = ( nx * ciL ) - buflen;
overhead = ( nx * ciL ) - buflen;
/* Avoid calling `memcpy` with NULL source or destination argument,
* even if buflen is 0. */
if( buf != NULL )
{
Xp = (unsigned char*) X;
memcpy( Xp + overhead, buf, buflen );
/* Avoid calling `memcpy` with NULL source or destination argument,
* even if buflen is 0. */
if( buf != NULL && X != NULL )
{
Xp = (unsigned char*) X;
memcpy( Xp + overhead, buf, buflen );
mbedtls_mpi_core_bigendian_to_host( X, nx );
mbedtls_mpi_core_bigendian_to_host( X, nx );
}
}
return( 0 );