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https://issues.apache.org/jira/browse/ZOOKEEPER-1305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267105#comment-13267105
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Michi Mutsuzaki commented on ZOOKEEPER-1305:
--------------------------------------------
Committed to 3.3 branch.
--Michi
> zookeeper.c:prepend_string func can dereference null ptr
> --------------------------------------------------------
>
> Key: ZOOKEEPER-1305
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1305
> Project: ZooKeeper
> Issue Type: Bug
> Components: c client
> Affects Versions: 3.3.3
> Environment: All
> Reporter: Daniel Lescohier
> Assignee: Daniel Lescohier
> Labels: patch
> Fix For: 3.4.1, 3.3.6, 3.5.0
>
> Attachments: ZOOKEEPER-1305.patch, ZOOKEEPER-1305.patch
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> All the callers of the function prepend_string make a call to prepend_string
> before checking that zhandle_t *zh is not null. At the top of prepend_string,
> zh is dereferenced without checking for a null ptr:
> static char* prepend_string(zhandle_t *zh, const char* client_path) {
> char *ret_str;
> if (zh->chroot == NULL)
> return (char *) client_path;
> I propose fixing this by adding the check here in prepend_string:
> static char* prepend_string(zhandle_t *zh, const char* client_path) {
> char *ret_str;
> if (zh==NULL || zh->chroot == NULL)
> return (char *) client_path;
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