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-rw-r--r--fs/userfaultfd.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 16d0cc600fa9..668bbbd2e04d 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -530,8 +530,13 @@ out:
static int userfaultfd_event_wait_completion(struct userfaultfd_ctx *ctx,
struct userfaultfd_wait_queue *ewq)
{
- int ret = 0;
+ int ret;
+
+ ret = -1;
+ if (WARN_ON_ONCE(current->flags & PF_EXITING))
+ goto out;
+ ret = 0;
ewq->ctx = ctx;
init_waitqueue_entry(&ewq->wq, current);
@@ -566,7 +571,7 @@ static int userfaultfd_event_wait_completion(struct userfaultfd_ctx *ctx,
* ctx may go away after this if the userfault pseudo fd is
* already released.
*/
-
+out:
userfaultfd_ctx_put(ctx);
return ret;
}