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Fix apr_global_mutex_create() usage #3269

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merged 2 commits into from
Oct 3, 2024
Merged

Fix apr_global_mutex_create() usage #3269

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23e3cb4
Fix for #3255
marcstern Oct 3, 2024
36a4194
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marcstern Oct 3, 2024
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4 changes: 3 additions & 1 deletion CHANGES
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Original file line number Diff line number Diff line change
@@ -1,7 +1,9 @@
(to be released) - 2.9.x
------------------------

* handle errors from apr_global_mutex_lock
* Fixed apr_global_mutex_create() usage (no filename)
[PR #3269 - @marcstern]
* handle errors from apr_global_mutex_lock
[PR #3257 - @marcstern]

03 Sep 2024 - 2.9.8
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25 changes: 1 addition & 24 deletions apache2/modsecurity.c
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Expand Up @@ -123,30 +123,7 @@ msc_engine *modsecurity_create(apr_pool_t *mp, int processing_mode) {
}

int acquire_global_lock(apr_global_mutex_t **lock, apr_pool_t *mp) {
apr_status_t rc;
apr_file_t *lock_name;
const char *temp_dir;
const char *filename = NULL;

// get platform temp dir
rc = apr_temp_dir_get(&temp_dir, mp);
if (rc != APR_SUCCESS) {
ap_log_perror(APLOG_MARK, APLOG_ERR, 0, mp, "ModSecurity: Could not get temp dir");
return -1;
}

// use temp path template for lock files
char *path = apr_pstrcat(mp, temp_dir, GLOBAL_LOCK_TEMPLATE, NULL);

rc = apr_file_mktemp(&lock_name, path, 0, mp);
if (rc != APR_SUCCESS) {
ap_log_perror(APLOG_MARK, APLOG_ERR, 0, mp, " ModSecurity: Could not create temporary file for global lock");
return -1;
}
// below func always return APR_SUCCESS
apr_file_name_get(&filename, lock_name);

rc = apr_global_mutex_create(lock, filename, APR_LOCK_DEFAULT, mp);
apr_status_t rc = apr_global_mutex_create(lock, NULL, APR_LOCK_DEFAULT, mp);
if (rc != APR_SUCCESS) {
ap_log_perror(APLOG_MARK, APLOG_ERR, 0, mp, " ModSecurity: Could not create global mutex");
return -1;
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2 changes: 0 additions & 2 deletions apache2/modsecurity.h
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Expand Up @@ -135,8 +135,6 @@ typedef struct msc_parm msc_parm;

#define FATAL_ERROR "ModSecurity: Fatal error (memory allocation or unexpected internal error)!"

#define GLOBAL_LOCK_TEMPLATE "/modsec-lock-tmp.XXXXXX"

extern DSOLOCAL char *new_server_signature;
extern DSOLOCAL char *real_server_signature;
extern DSOLOCAL char *chroot_dir;
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