CodeSonar : Pvm : Null Pointer Dereference

Pvm : Pvm analysis 1 : Null Pointer Dereference at lpvmcat.c:380

Categories:	LANG.MEM.NPD CWE:476
Warning ID:	2777.2833
Procedure:	pvmclaimo
Trace:	View
Modified:	Wed Sep 2 12:46:18 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/lpvmcat.c

			Enter pvmclaimo

	340		pvmclaimo(mid)
	341		int mid;
	342		{
	343		int tid; /* task */
	344		int n; /* length or event code */
	345		char *p;
	346		int ptid;
	347		struct tobuf *op;
	348
	349		/*
	350		if (TRACE) {
	351		checktrace(jp, cc, len, cod, src);
	352		return 0;
	353		}
	354		*/
	355
	356		pvm_upkint(&tid, 1, 1);
	357		pvm_upkint(&n, 1, 1);
	358
	359		if (!tobuflist) {
	360		pvmlogprintf("pvmclaimo() message from task t%x\n", tid ); /* Uninitialized Variable (ID: 2781.2840) */
	361		goto done;
	362		}
	363
	364		if (n > 0) { /* output printed by task / / Uninitialized Variable (ID: 2780.2839) */

	365		if (!(op = tobuf_find (tid ))) { /* Uninitialized Variable (ID: 2778.2838) */

366

pvmlogprintf("pvmclaimo() bogus message, no task t%x\n", tid );

367

goto done;

368

}

369

if (n + op->o_len >= op->o_maxl) {

370

op->o_maxl = op->o_len + n + 1;

371

372

printf("REALLOC t%x buf to %d\n", tid, op->o_maxl);

if (op->o_buf)

op->o_buf = TREALLOC(op->o_buf, op->o_maxl, char);

376

else

377

op->o_buf = TALLOC(op->o_maxl, char, "");

378

}

379

pvm_upkbyte(op->o_buf + op->o_len, n, 1);

op->o_buf <= 4095

380

op->o_buf[op->o_len + n] = 0; /* Null Pointer Dereference */

Preconditions

&$unknown_1561277 >= 1
tobuflist->o_link->o_tid = tid
tobuflist->o_link->o_buf != 0
pvmautoerr != 2
pvmautoerr != 3
pvmrbuf != 0
pvmtoplvl != 0
pvmtrc.trctid != pvmmytid
pvmtrc.trctid >= 1
tobuflist = tobuflist->o_link

Postconditions

tobuflist->o_link->o_buf' = 0
tobuflist->o_link->o_maxl' >= 0
mid' = $param_1
n' = &$unknown_1561277
op' = tobuflist->o_link
pvm_errno' = -2

Change Warning 2777.2833 : Null Pointer Dereference

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