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storage: avoid crash on parse error

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Coverity detected that we could crash on bogus input.  Meanwhile,
strtok_r is rather heavy compared to strchr.

* src/storage/storage_backend_iscsi.c (virStorageBackendIQNFound):
  Check for parse failure, and use lighter-weight functions.
This commit is contained in:
Eric Blake 2011-07-04 10:41:38 +08:00 committed by Daniel Veillard
parent 222f6233b4
commit 5dc404b71d
1 changed files with 10 additions and 4 deletions
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14
src/storage/storage_backend_iscsi.c
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@ -183,8 +183,7 @@ virStorageBackendIQNFound(const char *initiatoriqn,
int ret = IQN_MISSING, fd = -1;
char ebuf[64];
FILE *fp = NULL;
char *line = NULL, *newline = NULL, *iqn = NULL, *token = NULL,
*saveptr = NULL;
char *line = NULL, *newline = NULL, *iqn = NULL, *token = NULL;
virCommandPtr cmd = virCommandNewArgList(ISCSIADM,
"--mode", "iface", NULL);
@ -232,8 +231,15 @@ virStorageBackendIQNFound(const char *initiatoriqn,
iqn++;
if (STREQ(iqn, initiatoriqn)) {
token = strtok_r(line, " ", &saveptr);
*ifacename = strdup(token);
token = strchr(line, ' ');
if (!token) {
ret = IQN_ERROR;
virStorageReportError(VIR_ERR_INTERNAL_ERROR,
_("Missing space when parsing output "
"of '%s'"), ISCSIADM);
goto out;
}
*ifacename = strndup(line, token - line);
if (*ifacename == NULL) {
ret = IQN_ERROR;
virReportOOMError();