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Part of bug #1523610: fix miscalculation of buffer length.

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Also add a guard against NULL in converttuple and add a test case
(that previously would have crashed).
This commit is contained in:
Georg Brandl
2006-07-26 08:03:10 +00:00
parent 0619a329e8
commit 5f135787ec
3 changed files with 39 additions and 3 deletions
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Python/getargs.c
+10 -2
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@@ -351,8 +351,8 @@ seterror(int iarg, const char *msg, int *levels, const char *fname,
"argument %d", iarg);
i = 0;
p += strlen(p);
while (levels[i] > 0 && (int)(p-buf) < 220) {
PyOS_snprintf(p, sizeof(buf) - (buf - p),
while (levels[i] > 0 && i < 32 && (int)(p-buf) < 220) {
PyOS_snprintf(p, sizeof(buf) - (p - buf),
", item %d", levels[i]-1);
p += strlen(p);
i++;
@@ -439,6 +439,13 @@ converttuple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
char *msg;
PyObject *item;
item = PySequence_GetItem(arg, i);
if (item == NULL) {
PyErr_Clear();
levels[0] = i+1;
levels[1] = 0;
strncpy(msgbuf, "is not retrievable", bufsize);
return msgbuf;
}
msg = convertitem(item, &format, p_va, flags, levels+1,
msgbuf, bufsize, freelist);
/* PySequence_GetItem calls tp->sq_item, which INCREFs */
@@ -1509,6 +1516,7 @@ vgetargskeywords(PyObject *args, PyObject *keywords, const char *format,
else {
msg = skipitem(&format, p_va, flags);
if (msg) {
levels[0] = 0;
seterror(i+1, msg, levels, fname, message);
return cleanreturn(0, freelist);
}