Bug 468807
| Summary: | The function _nss_ldap_gethostbyname_r doen't set the proper return value and errno_p when the length of name is less than required | ||||||
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| Product: | Red Hat Enterprise Linux 5 | Reporter: | Jason Luo <jason.luo> | ||||
| Component: | nss_ldap | Assignee: | Nalin Dahyabhai <nalin> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Ondrej Moriš <omoris> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 5.2 | CC: | dpal, jplans, omoris | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | nss_ldap-253-27.el5 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2011-01-13 23:31:53 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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upstream Bugzilla: http://bugzilla.padl.com/show_bug.cgi?id=378 An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2011-0097.html |
Created attachment 321677 [details] nss_ldap-253-errnop.patch let's look at the prototype of some related functions: NSS_STATUS _nss_ldap_gethostbyname_r (const char *name, struct hostent * result, char *buffer, size_t buflen, int *errnop, int *h_errnop) struct hostent *gethostbyname2(const char *name, int af) int gethostbyname2_r(const char *name, int af, struct hostent *ret, char *buf, size_t buflen, struct hostent **result, int *h_errnop); we assume that we get hosts from ldap server. gethostbyname2 call gethostbyname2_r to get the hosts from ldap_server, the default size of name(the first parameter of function gethostbyname2) is 1024. If the size is not enough, gethostbyname2 require gethostbyname2_r to return the errno as the return value , set the proper value of h_errnop , then gethostbyname2 will double the size of name and call gethostbyname2_r again. but, the function called by gethostbyname2 doesn't follow the restriction. in nss_ldap, the related function is _nss_ldap_gethostbyname_r.