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Always check return status of mutex_(un)lock()

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Manuel Pégourié-Gonnard 2015-04-24 14:42:53 +02:00
parent 8f5fd31212
commit bdd7828ca0
2 changed files with 21 additions and 10 deletions
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13
library/memory_buffer_alloc.c
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@ -542,17 +542,22 @@ void mbedtls_memory_buffer_alloc_cur_get( size_t *cur_used, size_t *cur_blocks )
static void *buffer_alloc_malloc_mutexed( size_t len )
{
void *buf;
mbedtls_mutex_lock( &heap.mutex );
if( mbedtls_mutex_lock( &heap.mutex ) != 0 )
return( NULL );
buf = buffer_alloc_malloc( len );
mbedtls_mutex_unlock( &heap.mutex );
if( mbedtls_mutex_unlock( &heap.mutex ) )
return( NULL );
return( buf );
}
static void buffer_alloc_free_mutexed( void *ptr )
{
mbedtls_mutex_lock( &heap.mutex );
/* We have to good option here, but corrupting the heap seems
* worse than loosing memory. */
if( mbedtls_mutex_lock( &heap.mutex ) )
return;
buffer_alloc_free( ptr );
mbedtls_mutex_unlock( &heap.mutex );
(void) mbedtls_mutex_unlock( &heap.mutex );
}
#endif /* MBEDTLS_THREADING_C */

18
library/rsa.c
View file

@ -283,7 +283,8 @@ int mbedtls_rsa_public( mbedtls_rsa_context *ctx,
}
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_lock( &ctx->mutex );
if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
return( ret );
#endif
olen = ctx->len;
@ -292,7 +293,8 @@ int mbedtls_rsa_public( mbedtls_rsa_context *ctx,
cleanup:
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_unlock( &ctx->mutex );
if( ( ret = mbedtls_mutex_unlock( &ctx->mutex ) ) != 0 )
return( ret );
#endif
mbedtls_mpi_free( &T );
@ -315,7 +317,8 @@ static int rsa_prepare_blinding( mbedtls_rsa_context *ctx, mbedtls_mpi *Vi, mbed
int ret, count = 0;
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_lock( &ctx->mutex );
if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
return( ret );
#endif
if( ctx->Vf.p != NULL )
@ -351,7 +354,8 @@ done:
cleanup:
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_unlock( &ctx->mutex );
if( ( ret = mbedtls_mutex_unlock( &ctx->mutex ) ) != 0 )
return( ret );
#endif
return( ret );
@ -408,7 +412,8 @@ int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
}
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_lock( &ctx->mutex );
if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
return( ret );
#endif
#if defined(MBEDTLS_RSA_NO_CRT)
@ -452,7 +457,8 @@ int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
cleanup:
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_unlock( &ctx->mutex );
if( ( ret = mbedtls_mutex_unlock( &ctx->mutex ) ) != 0 )
return( ret );
mbedtls_mpi_free( &Vi_copy ); mbedtls_mpi_free( &Vf_copy );
#endif
mbedtls_mpi_free( &T ); mbedtls_mpi_free( &T1 ); mbedtls_mpi_free( &T2 );