Messages in this thread Patch in this message | | | Date | Mon, 10 Jul 2006 17:40:51 +0400 | From | Kirill Korotaev <> | Subject | [PATCH] fdset's leakage |
| |
Andrew,
Another patch from Alexey Kuznetsov fixing memory leak in alloc_fdtable().
[PATCH] fdset's leakage
When found, it is obvious. nfds calculated when allocating fdsets is rewritten by calculation of size of fdtable, and when we are unlucky, we try to free fdsets of wrong size.
Found due to OpenVZ resource management (User Beancounters).
Signed-Off-By: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-Off-By: Kirill Korotaev <dev@openvz.org>
diff -urp linux-2.6-orig/fs/file.c linux-2.6/fs/file.c --- linux-2.6-orig/fs/file.c 2006-07-10 12:10:51.000000000 +0400 +++ linux-2.6/fs/file.c 2006-07-10 14:47:01.000000000 +0400 @@ -277,11 +277,13 @@ static struct fdtable *alloc_fdtable(int } while (nfds <= nr); new_fds = alloc_fd_array(nfds); if (!new_fds) - goto out; + goto out2; fdt->fd = new_fds; fdt->max_fds = nfds; fdt->free_files = NULL; return fdt; +out2: + nfds = fdt->max_fdset; out: if (new_openset) free_fdset(new_openset, nfds); | |