CodeSonar : Pvm : Null Pointer Dereference

Pvm : Pvm analysis 1 : Null Pointer Dereference at tdpro.c:1581

Categories:	LANG.MEM.NPD CWE:476
Warning ID:	2712.2765
Procedure:	tm_task
Trace:	View
Modified:	Wed Sep 2 12:44:13 2009 show details hide details

Priority:	None
State:	None
Finding:	None
Owner:	None
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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

Legend
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

			/u1/paul/SATE/2010/c/pvm/pvm3/src/tdpro.c

			Enter tm_task

tm_task(tp, mp)

struct task *tp;

struct pmsg *mp;

{

int where;

struct pmsg *mp2;

struct waitc *wp;

struct waitc *wp2 = 0; /* master waitc of peer group */

int hh;

struct hostd *hp;

if (upkuint(mp, &where )) {

1560

pvmlogerror("tm_task() bad msg format\n");

return 0;

}

mp = replymessage (mp );

1565

mp->m_dst = tp->t_tid; /* Null Pointer Dereference (ID: 2714.2767) */

1566

mp->m_tag = TM_TASK;

1567

1568

if (where) { /* specific host or task requested */

1569

if (!(hp = tidtohost (hosts, where ))) {

1570

pkint(mp, PvmNoHost );

sendmessage(mp );

return 0;

}

pkint(mp, 0);

wp = wait_new (WT_TASK );

1576

wp->wa_mesg = mp;

1577

wp->wa_tid = tp->t_tid;

1578

wp->wa_on = hp->hd_hostpart;

mp = mesg_new (0);

mp->m_tag = DM_TASK; /* Null Pointer Dereference */

Preconditions

&$unknown_1005891 != 0
hosts->ht_last >= 1
numfrags = 0
numpmsgs = 1

Postconditions

freepmsgs.m_link->m_link->m_rlink' = freepmsgs.m_link->m_rlink
waitlist->wa_link->wa_rlink' = &$heap_161261
waitlist->wa_link->wa_rlink->wa_link' = &$heap_161261
freepmsgs.m_link->m_rlink->m_link' = freepmsgs.m_link->m_link
$unknown_1005889' = &freefrags.fr_link
((char*)&$unknown_1005889)[8]' = ((char*)&$unknown_1005890)[8]
freefrags.fr_link' = &$unknown_1005889 - 64
freefrags.fr_rlink' = &$unknown_1005889
freepmsgs.m_link' = &freepmsgs.m_link
freepmsgs.m_rlink' = &freepmsgs.m_link
$heap_161261' = waitlist->wa_link
bytes_after(&$heap_161261)' = 80
$heap_161261' is allocated by malloc
$heap_161261' is allocated
bytes_before(&$heap_161261)' = 0
((char*)&$heap_161261)[20]' = 4
((char*)&$heap_161261)[28]' = ((char*)$param_1)[32]
((char*)&$heap_161261)[32]' = 0
((char*)&$heap_161261)[56]' = freepmsgs.m_link
((char*)&$heap_161261)[64]' = 0
((char*)&$heap_161261)[72]' = 0
((char*)&$heap_161261)[8]' = waitlist->wa_link->wa_rlink
hp' = &$unknown_1005892
mp' = 0
numfrags' = 499
numpmsgs' = numpmsgs - 1
tp' = $param_1
where' = &$unknown_1005891
wp' = &$heap_161261
wp2' = 0

Change Warning 2712.2765 : Null Pointer Dereference

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