CodeSonar : pvm3.4.6 : Null Pointer Dereference

Categories:	LANG.MEM.NPD CWE:476
Warning ID:	294.28969
Procedure:	tm_task
Trace:	view
Modified:	Thu Nov 26 11:29:18 2009 show details hide details

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Warning Location Contributes Parse Error Other Warning Two or More Loop Iterations On Execution Path Comment Macro Preprocessor Include Keyword Preprocessed Away

Source | Language: C

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Problem	Line	Source

			/kat0/fletcher/SATE/2010/pvm3/src/tdpro.c

			Enter tm_task

	1548		tm_task(tp, mp)
	1549		struct task *tp;
	1550		struct pmsg *mp;
	1551		{
	1552		int where;
	1553		struct pmsg *mp2;
	1554		struct waitc *wp;
	1555		struct waitc wp2 = 0; / master waitc of peer group */
	1556		int hh;
	1557		struct hostd *hp;
	1558
	1559		if (upkuint(mp, &where )) {
	1560		pvmlogerror("tm_task() bad msg format\n");
	1561		return 0;
	1562		}
	1563

mp = replymessage (mp );

mp->m_dst = tp->t_tid; /* Null Pointer Dereference */

Preconditions

numpmsgs = 0

Postconditions

errno' != 0
freepmsgs.m_link' = &freepmsgs.m_link
freepmsgs.m_rlink' = &freepmsgs.m_link
mp' = 0
wp2' = 0