diff options
| -rw-r--r-- | ncr-limits.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/ncr-limits.c b/ncr-limits.c index 378233c..73f148b 100644 --- a/ncr-limits.c +++ b/ncr-limits.c @@ -98,6 +98,7 @@ int ncr_limits_add_and_check(uid_t uid, pid_t pid, limits_type_t type) struct limit_process_item_st* pitem; struct limit_user_item_st* uitem; int add = 1; +int ret; down(&limits.users.sem); list_for_each_entry(uitem, &limits.users.list, list) { @@ -116,6 +117,7 @@ int add = 1; uitem = kmalloc( sizeof(*uitem), GFP_KERNEL); if (uitem == NULL) { err(); + up(&limits.users.sem); return -ENOMEM; } uitem->uid = uid; @@ -135,7 +137,9 @@ int add = 1; if (atomic_add_unless(&pitem->cnt, 1, max_per_process[type])==0) { err(); up(&limits.processes.sem); - return -EPERM; + + ret = -EPERM; + goto restore_user; } } } @@ -145,7 +149,9 @@ int add = 1; pitem = kmalloc(sizeof(*pitem), GFP_KERNEL); if (uitem == NULL) { err(); - return -ENOMEM; + up(&limits.processes.sem); + ret = -ENOMEM; + goto restore_user; } pitem->pid = task_pid_nr(current); pitem->type = type; @@ -156,6 +162,15 @@ int add = 1; up(&limits.processes.sem); return 0; + +restore_user: + down(&limits.users.sem); + list_for_each_entry(uitem, &limits.users.list, list) { + if (uitem->uid == uid && uitem->type == type) + atomic_dec(&uitem->cnt); + } + up(&limits.users.sem); + return ret; } void ncr_limits_remove(uid_t uid, pid_t pid, limits_type_t type) |