CodeSonar : Pvm : Null Pointer Dereference

Pvm : Pvm analysis 1 : Null Pointer Dereference at tdpro.c:2569

Categories:	LANG.MEM.NPD CWE:476
Warning ID:	2736.2789
Procedure:	tm_hostsync
Trace:	View
Modified:	Wed Sep 2 12:44:38 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_hostsync

tm_hostsync(tp, mp)

struct task *tp;

struct pmsg *mp;

{

int where;

struct hostd *hp;

struct pmsg *mp2;

struct waitc *wp;

if (upkuint(mp, &where )) {

2551

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

return 0;

}

mp2 = replymessage (mp );

2556

2557

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

2558

pkint(mp2, PvmNoHost );

sendmessage(mp2 );

return 0;

}

wp = wait_new (WT_HOSTSYNC );

2564

wp->wa_tid = mp->m_src;

2565

wp->wa_on = hp->hd_hostpart;

wp->wa_mesg = mp2;

mp2 = mesg_new (0);

mp2->m_dst = where | TIDPVMD; /* Null Pointer Dereference */

Preconditions

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' = &$heap_162470
waitlist->wa_link->wa_rlink->wa_link' = &$heap_162470
freepmsgs.m_link->m_rlink->m_link' = freepmsgs.m_link->m_link
$unknown_1148909' = &freefrags.fr_link
((char*)&$unknown_1148909)[8]' = ((char*)&$unknown_1148908)[8]
freefrags.fr_link' = &$unknown_1148909 - 64
freefrags.fr_rlink' = &$unknown_1148909
freepmsgs.m_link' = &freepmsgs.m_link
freepmsgs.m_rlink' = &freepmsgs.m_link
$heap_162470' = waitlist->wa_link
bytes_after(&$heap_162470)' = 80
$heap_162470' is allocated by malloc
$heap_162470' is allocated
bytes_before(&$heap_162470)' = 0
((char*)&$heap_162470)[20]' = 13
((char*)&$heap_162470)[32]' = 0
((char*)&$heap_162470)[56]' = freepmsgs.m_link
((char*)&$heap_162470)[64]' = 0
((char*)&$heap_162470)[72]' = 0
((char*)&$heap_162470)[8]' = waitlist->wa_link->wa_rlink
hp' = &$unknown_1148910
mp' = $param_2
mp2' = 0
numfrags' = 499
numpmsgs' = numpmsgs - 1
tp' = $param_1
wp' = &$heap_162470

Change Warning 2736.2789 : Null Pointer Dereference

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