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Merge pull request #3578 from gilles-peskine-arm/md_setup-leak-development

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Fix memory leak in mbedtls_md_setup with HMAC
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Manuel Pégourié-Gonnard 2020-08-21 09:19:12 +02:00 committed by GitHub
commit 1a6af8489e
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2 changed files with 7 additions and 2 deletions
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3
ChangeLog.d/md_setup-leak.txt Normal file
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@ -0,0 +1,3 @@
Bugfix
* Fix a memory leak in mbedtls_md_setup() when using HMAC under low memory
conditions. Reported and fix suggested by Guido Vranken in #3486.

6
library/md.c
View File

@ -411,6 +411,10 @@ int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_inf
if( md_info == NULL || ctx == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
ctx->md_info = md_info;
ctx->md_ctx = NULL;
ctx->hmac_ctx = NULL;
switch( md_info->type )
{
#if defined(MBEDTLS_MD2_C)
@ -466,8 +470,6 @@ int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_inf
}
}
ctx->md_info = md_info;
return( 0 );
}
#undef ALLOC