[gvg] 20316: Checking memory allocation return values helps prevent crashes

Checking memory allocation return values helps prevent crashes
Modified:
trunk/reactos/drivers/lib/oskittcp/include/freebsd/src/sys/sys/mbuf.h
Modified: trunk/reactos/drivers/lib/oskittcp/oskittcp/ip_output.c
  _____

Modified:
trunk/reactos/drivers/lib/oskittcp/include/freebsd/src/sys/sys/mbuf.h
---
trunk/reactos/drivers/lib/oskittcp/include/freebsd/src/sys/sys/mbuf.h
2005-12-23 20:46:48 UTC (rev 20315)
+++
trunk/reactos/drivers/lib/oskittcp/include/freebsd/src/sys/sys/mbuf.h
2005-12-23 20:47:54 UTC (rev 20316)
@@ -304,9 +304,12 @@

#ifdef __REACTOS__
 #define MCLGET(m, how) { \
           OS_DbgPrint(OSK_MID_TRACE,("(MCLGET) m = %x\n", m)); \
-          (m)->m_data = (m)->m_ext.ext_buf = malloc(MCLBYTES); \
-          (m)->m_flags |= M_EXT; \
-          (m)->m_ext.ext_size = MCLBYTES; \
+          (m)->m_ext.ext_buf = malloc(MCLBYTES); \
+	  if ((m)->m_ext.ext_buf != NULL) { \
+              (m)->m_data = (m)->m_ext.ext_buf; \
+              (m)->m_flags |= M_EXT; \
+              (m)->m_ext.ext_size = MCLBYTES; \
+          } \
         }

#define MCLFREE(p) { \
  _____

Modified: trunk/reactos/drivers/lib/oskittcp/oskittcp/ip_output.c
--- trunk/reactos/drivers/lib/oskittcp/oskittcp/ip_output.c
2005-12-23 20:46:48 UTC (rev 20315)
+++ trunk/reactos/drivers/lib/oskittcp/oskittcp/ip_output.c
2005-12-23 20:47:54 UTC (rev 20316)
@@ -366,8 +366,17 @@

#ifdef __REACTOS__
        if( OtcpEvent.PacketSend ) {
    	struct mbuf *new_m;
-		MGET( new_m, M_DONTWAIT, 0 );
+		new_m = m_get( M_DONTWAIT, 0 );
+		if ( NULL == new_m ) {
+		    error = ENOBUFS;
+		    goto done;
+		}
    	MCLGET( new_m, M_DONTWAIT );
+		if (0 == (new_m->m_flags & M_EXT)) {
+		    m_free( new_m );
+		    error = ENOBUFS;
+		    goto done;
+		}
    	m_copydata( m, 0, htons(ip->ip_len), new_m->m_data );
    	new_m->m_len = htons(ip->ip_len);
    	error = OtcpEvent.PacketSend( OtcpEvent.ClientData,
@@ -498,7 +507,16 @@
    if( error == 0 && OtcpEvent.PacketSend ) {
        struct mbuf *new_m;
        MGET( new_m, M_DONTWAIT, 0 );
+	    if ( NULL == new_m ) {
+		error = ENOBUFS;
+		goto done;
+	    }
        MCLGET( new_m, M_DONTWAIT );
+	    if (0 == (new_m->m_flags & M_EXT)) {
+		m_free( new_m );
+		error = ENOBUFS;
+		goto done;
+	    }
        m_copydata( m, 0, htons(ip->ip_len), new_m->m_data );
        new_m->m_len = htons(ip->ip_len);
        error = OtcpEvent.PacketSend( OtcpEvent.ClientData,