diff options
| author | Maxime Ripard <maxime@cerno.tech> | 2020-09-14 18:11:40 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2020-09-14 18:11:40 +0200 |
| commit | 00af6729b52ede86a08173c8d5f2c8cd9fa3390d (patch) | |
| tree | 6a8cec3575d5cd49fffadb372b85da5475a266b0 /kernel/watch_queue.c | |
| parent | drm: fix double free for gbo in drm_gem_vram_init and drm_gem_vram_create (diff) | |
| parent | Merge v5.9-rc5 into drm-next (diff) | |
| download | linux-00af6729b52ede86a08173c8d5f2c8cd9fa3390d.tar.gz linux-00af6729b52ede86a08173c8d5f2c8cd9fa3390d.zip | |
Merge drm/drm-next into drm-misc-next
Paul Cercueil needs some patches in -rc5 to apply new patches for ingenic
properly.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Diffstat (limited to 'kernel/watch_queue.c')
| -rw-r--r-- | kernel/watch_queue.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/watch_queue.c b/kernel/watch_queue.c index f74020f6bd9d..0ef8f65bd2d7 100644 --- a/kernel/watch_queue.c +++ b/kernel/watch_queue.c @@ -393,6 +393,7 @@ static void free_watch(struct rcu_head *rcu) struct watch *watch = container_of(rcu, struct watch, rcu); put_watch_queue(rcu_access_pointer(watch->queue)); + atomic_dec(&watch->cred->user->nr_watches); put_cred(watch->cred); } @@ -452,6 +453,13 @@ int add_watch_to_object(struct watch *watch, struct watch_list *wlist) watch->cred = get_current_cred(); rcu_assign_pointer(watch->watch_list, wlist); + if (atomic_inc_return(&watch->cred->user->nr_watches) > + task_rlimit(current, RLIMIT_NOFILE)) { + atomic_dec(&watch->cred->user->nr_watches); + put_cred(watch->cred); + return -EAGAIN; + } + spin_lock_bh(&wqueue->lock); kref_get(&wqueue->usage); kref_get(&watch->usage); |