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malloctest: Fix issue with use after free

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Do not call realloc() with a previously freed pointer.  Perform a
successful reallocation.
This commit is contained in:
Sebastian Huber
2025-07-01 04:26:20 +02:00
committed by Amar Takhar
parent 7215a3051a
commit eb4f544689
1 changed files with 7 additions and 10 deletions
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17
testsuites/libtests/malloctest/init.c
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@@ -1543,6 +1543,7 @@ static void test_early_malloc( void )
void *r; void *r;
void *s; void *s;
void *t; void *t;
void *u;
p = malloc( 1 ); p = malloc( 1 );
rtems_test_assert( p != NULL ); rtems_test_assert( p != NULL );
@@ -1556,15 +1557,8 @@ static void test_early_malloc( void )
free( q ); free( q );
/* r = realloc( NULL, 128 );
* This was added to address the following warning. rtems_test_assert( r != q );
* warning: pointer 'q' used after 'free'
*/
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wuse-after-free"
r = realloc( q, 128 );
rtems_test_assert( r == q );
#pragma GCC diagnostic pop
s = malloc( 1 ); s = malloc( 1 );
rtems_test_assert( s != NULL ); rtems_test_assert( s != NULL );
@@ -1575,7 +1569,10 @@ static void test_early_malloc( void )
rtems_test_assert( t != NULL ); rtems_test_assert( t != NULL );
rtems_test_assert( t != r ); rtems_test_assert( t != r );
free( t ); u = realloc( t, 384 );
rtems_test_assert( t == u );
free( u );
} }
RTEMS_SYSINIT_ITEM( RTEMS_SYSINIT_ITEM(