CodeSonar : pvm3.4.6 : Null Pointer Dereference

pvm3.4.6 : pvm3.4.6 analysis 2 : Null Pointer Dereference at tdpro.c:2165

Categories:	LANG.MEM.NPD CWE:476
Warning ID:	309.28986
Procedure:	tm_mstat
Trace:	view
Modified:	Thu Nov 26 11:29:23 2009 show details hide details

Priority:	None
State:	None
Finding:	None
Owner:	None
	edit properties

Legend	[ X ]
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

Hide Legend

Problem	Line	Source

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

			Enter tm_mstat

tm_mstat(tp, mp)

struct task *tp;

struct pmsg *mp;

{

char *name;

struct hostd *hp;

struct waitc *wp;

if (upkstralloc(mp, &name )) {

2144

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

return 0;

}

hp = nametohost (hosts, name );

PVM_FREE(name);

if (!hp) {

mp = replymessage (mp );

2154

pkint(mp, PvmNoHost );

sendmessage(mp );

return 0;

}

wp = wait_new (WT_MSTAT );

2160

wp->wa_tid = tp->t_tid;

2161

wp->wa_on = hp->hd_hostpart;

2162

wp->wa_mesg = replymessage (mp );

mp = mesg_new (0);

mp->m_dst = hp->hd_hostpart | TIDPVMD; /* Null Pointer Dereference */

Preconditions

&$unknown_1030510 >= 1
hosts->ht_last >= 2
numfrags = 0
numpmsgs = 1
widrange <= lastwid

Postconditions

freepmsgs.m_link->m_link->m_rlink' = freepmsgs.m_link->m_rlink
((char*)$unknown_1030512)[4]' = &$heap_334595
((char*)*$unknown_1030512)[4]' = &$heap_334595
freepmsgs.m_link->m_rlink->m_link' = freepmsgs.m_link->m_link
((char*)$unknown_1030514)[4]' = &$unknown_1030513
$unknown_1030513' = &freefrags.fr_link
((char*)&$unknown_1030513)[4]' = ((char*)&$unknown_1030514)[4]
errno' != 0
freefrags.fr_link' = &$unknown_1030513 - 48
freefrags.fr_rlink' = &$unknown_1030513
freepmsgs.m_link' = &freepmsgs.m_link
freepmsgs.m_rlink' = &freepmsgs.m_link
bytes_after(&$heap_334594)' = &$unknown_1030510
$heap_334594' is allocated by malloc
$heap_334594' is freed
bytes_before(&$heap_334594)' = 0
$heap_334595' = $unknown_1030512
bytes_after(&$heap_334595)' = 48
$heap_334595' is allocated by malloc
$heap_334595' is allocated
bytes_before(&$heap_334595)' = 0
((char*)&$heap_334595)[20]' = tp->t_tid
((char*)&$heap_334595)[24]' = 0
((char*)&$heap_334595)[28]' = &$heap_334595
((char*)&$heap_334595)[32]' = &$heap_334595
((char*)&$heap_334595)[36]' = freepmsgs.m_link
((char*)&$heap_334595)[40]' = 0
((char*)&$heap_334595)[4]' = ((char*)$unknown_1030512)[4]
((char*)&$heap_334595)[44]' = 0
((char*)&$heap_334595)[8]' >= ((char*)&$unknown_1030512)[8] + 1
((char*)&$heap_334595)[12]' = 9
hp' = &$unknown_1030511
mp' = 0
name' = &$heap_334594
numfrags' = 499
numpmsgs' = numpmsgs - 1
wp' = &$heap_334595

Change Warning 309.28986 : Null Pointer Dereference

Priority:
State:
Finding:
Owner:
Note: