IntenseWebs/nginx
3
0
Fork 0
mirror of https://github.com/nginx/nginx.git synced 2024-12-19 05:33:52 -06:00
Code Issues Packages Projects Releases Wiki Activity

Slab: improved double free detection.

Browse Source 
Previously, an attempt to double free the starting page of the
free range was not detected.
This commit is contained in:
Ruslan Ermilov 2016-12-03 10:01:39 +03:00
parent 34b41a70a6
commit cdd0cd6e2c
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/core/ngx_slab.c
View File

@ -597,7 +597,7 @@ ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p)
goto wrong_chunk;
}
if (slab == NGX_SLAB_PAGE_FREE) {
if (!(slab & NGX_SLAB_PAGE_START)) {
ngx_slab_error(pool, NGX_LOG_ALERT,
"ngx_slab_free(): page is already free");
goto fail;