RepoMirrors/haproxy
1
0
Fork 0
mirror of http://git.haproxy.org/git/haproxy.git/ synced 2024-12-11 22:15:14 +00:00
Code Issues Packages Projects Releases Wiki Activity

MINOR: proxy: always properly reset the just freed default instance pointers

Browse Source 
In proxy_free_defaults(); none of the free() calls was followed by a
pointer reset. Not only it's hard to figure if one of them is duplicated,
but this code started to call other functions which might or might not
rely on such just freed pointers. Let's reset them as they should be to
make sure there will never be any case of use-after-free. The 3 functions
called there were inspected and are all unaffected by this so this remains
safe to do right now.
This commit is contained in:
Willy Tarreau 2021-02-12 10:48:53 +01:00
parent a3320a0509
commit 818ec78af8
1 changed files with 26 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
src/proxy.c
View File

@ -1107,38 +1107,39 @@ void proxy_preset_defaults(struct proxy *defproxy)
*/ */
void proxy_free_defaults(struct proxy *defproxy) void proxy_free_defaults(struct proxy *defproxy)
{ {
free(defproxy->conf.file); free(defproxy->conf.file); defproxy->conf.file = NULL;
free(defproxy->check_command); free(defproxy->check_command); defproxy->check_command = NULL;
free(defproxy->check_path); free(defproxy->check_path); defproxy->check_path = NULL;
free(defproxy->cookie_name); free(defproxy->cookie_name); defproxy->cookie_name = NULL;
free(defproxy->rdp_cookie_name); free(defproxy->rdp_cookie_name); defproxy->rdp_cookie_name = NULL;
free(defproxy->dyncookie_key); free(defproxy->dyncookie_key); defproxy->dyncookie_key = NULL;
free(defproxy->cookie_domain); free(defproxy->cookie_domain); defproxy->cookie_domain = NULL;
free(defproxy->cookie_attrs); free(defproxy->cookie_attrs); defproxy->cookie_attrs = NULL;
free(defproxy->lbprm.arg_str); free(defproxy->lbprm.arg_str); defproxy->lbprm.arg_str = NULL;
free(defproxy->capture_name); free(defproxy->capture_name); defproxy->capture_name = NULL;
free(defproxy->monitor_uri); free(defproxy->monitor_uri); defproxy->monitor_uri = NULL;
free(defproxy->defbe.name); free(defproxy->defbe.name); defproxy->defbe.name = NULL;
free(defproxy->conn_src.iface_name); free(defproxy->conn_src.iface_name); defproxy->conn_src.iface_name = NULL;
free(defproxy->fwdfor_hdr_name); free(defproxy->fwdfor_hdr_name); defproxy->fwdfor_hdr_name = NULL; defproxy->fwdfor_hdr_len = 0;
defproxy->fwdfor_hdr_len = 0; free(defproxy->orgto_hdr_name); defproxy->orgto_hdr_name = NULL; defproxy->orgto_hdr_len = 0;
free(defproxy->orgto_hdr_name); free(defproxy->server_id_hdr_name); defproxy->server_id_hdr_name = NULL; defproxy->server_id_hdr_len = 0;
defproxy->orgto_hdr_len = 0;
free(defproxy->server_id_hdr_name);
defproxy->server_id_hdr_len = 0;
if (defproxy->conf.logformat_string != default_http_log_format && if (defproxy->conf.logformat_string != default_http_log_format &&
defproxy->conf.logformat_string != default_tcp_log_format && defproxy->conf.logformat_string != default_tcp_log_format &&
defproxy->conf.logformat_string != clf_http_log_format) defproxy->conf.logformat_string != clf_http_log_format) {
free(defproxy->conf.logformat_string); free(defproxy->conf.logformat_string);
defproxy->conf.logformat_string = NULL;
}
if (defproxy->conf.logformat_sd_string != default_rfc5424_sd_log_format) if (defproxy->conf.logformat_sd_string != default_rfc5424_sd_log_format) {
free(defproxy->conf.logformat_sd_string); free(defproxy->conf.logformat_sd_string);
defproxy->conf.logformat_sd_string = NULL;
}
free(defproxy->conf.uniqueid_format_string); free(defproxy->conf.uniqueid_format_string); defproxy->conf.uniqueid_format_string = NULL;
free(defproxy->conf.lfs_file); free(defproxy->conf.lfs_file); defproxy->conf.lfs_file = NULL;
free(defproxy->conf.lfsd_file); free(defproxy->conf.lfsd_file); defproxy->conf.lfsd_file = NULL;
free(defproxy->conf.uif_file); free(defproxy->conf.uif_file); defproxy->conf.uif_file = NULL;
chunk_destroy(&defproxy->log_tag); chunk_destroy(&defproxy->log_tag);
free_email_alert(defproxy); free_email_alert(defproxy);