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Pvm : Pvm analysis 1 : Null Pointer Dereference  at host.c:547

Categories: LANG.MEM.NPD CWE:476
Warning ID: 2473.2501
Procedure: ht_insert
Trace: View
Modified: Wed Sep 2 12:39:44 2009   show details
 
Priority: None
State: None
Finding: None
Owner: None
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Parse Error
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Two or More Loop Iterations
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Source  |  Language: C Hide Legend     
ProblemLineSource
   /u1/paul/SATE/2010/c/pvm/pvm3/src/host.c
   Enter ht_insert
 507 ht_insert(htp, hp) 
 508         struct htab *htp;
 509         struct hostd *hp;
 510 {
 511         int hh;
 512         int i;
 513         unsigned long mask = 0, tmpmask;
 514  
 515         int *dsigs;
 516         int ndsigs;
 517         int found;
 518         int d;
 519  
 520         hh = (hp->hd_hostpart & tidhmask) >> (ffs(tidhmask) - 1);
 521  
 522         /* extend ht_hosts[] if no room */ 
 523  
 524         if (hh > htp->ht_last) {
 525                 int n = htp->ht_last;
 526  
 527                 htp->ht_last = (hh * 3) / 2;
 528                 htp->ht_hosts = TREALLOC(htp->ht_hosts, htp->ht_last + 1, struct hostd*);
 529                 while (++n <= htp->ht_last)
 530                         htp->ht_hosts[n] = 0;   /* Null Pointer Dereference (ID: 2570.2602) */  /* 6 more... */
 531         }
 532  
 533         /* if already have an entry, take this as an update XXX kind of a hack */ 
 534  
 535         if (htp->ht_hosts[hh]) {        /* already have an entry */ 
 536  
 537                 struct hostd *hp2 = htp->ht_hosts[hh];
 538  
 539                 if (hp->hd_name) {
 540                         if (hp2->hd_name)
 541                                 PVM_FREE(hp2->hd_name);
 542                         hp2->hd_name = STRALLOC(hp->hd_name);   /* Null Pointer Dereference (ID: 2474.2502) */
 543                 }
 544                 if (hp->hd_arch) {
 545                         if (hp2->hd_arch)
 546                                 PVM_FREE(hp2->hd_arch);
true547                         hp2->hd_arch = STRALLOC(hp->hd_arch);     /* Null Pointer Dereference */
Preconditions 
((char*)$param_2)[16] != 0
((char*)&$unknown_92683)[16] != 0
Postconditions 
((char*)$unknown_92683)[16]' is freed
((char*)$unknown_92683)[8]' is freed
((char*)&$unknown_92683)[8]' = &$heap_3582
$heap_3582' = ((char*)*$param_2)[8]
bytes_after(&$heap_3582)' = strlen(((char*)$param_2)[8]) + 1
$heap_3582' is allocated by malloc
$heap_3582' is allocated
bytes_before(&$heap_3582)' = 0
strlen(&$heap_3582)' = strlen(((char*)$param_2)[8])
hh' >= ((char*)$param_1)[4] + 1
hp' = $param_2
hp2' = &$unknown_92683
htp' = $param_1
mask' = 0



Change Warning 2473.2501 : Null Pointer Dereference

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