io_sq_thread_acquire_mm_files() can find a PF_EXITING task only when
it's called from task_work context. Don't check it in all other cases,
that are when we're in io_uring_enter().
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
fs/io_uring.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 9c58be0579f3..66bbb0dc50af 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1213,8 +1213,6 @@ static int __io_sq_thread_acquire_mm_files(struct io_ring_ctx *ctx,
static inline int io_sq_thread_acquire_mm_files(struct io_ring_ctx *ctx,
struct io_kiocb *req)
{
- if (unlikely(current->flags & PF_EXITING))
- return -EFAULT;
if (!(ctx->flags & IORING_SETUP_SQPOLL))
return 0;
return __io_sq_thread_acquire_mm_files(ctx, req);
@@ -2338,7 +2336,8 @@ static void __io_req_task_submit(struct io_kiocb *req)
/* ctx stays valid until unlock, even if we drop all ours ctx->refs */
mutex_lock(&ctx->uring_lock);
- if (!ctx->sqo_dead && !io_sq_thread_acquire_mm_files(ctx, req))
+ if (!ctx->sqo_dead && !(current->flags & PF_EXITING) &&
+ !io_sq_thread_acquire_mm_files(ctx, req))
__io_queue_sqe(req);
else
__io_req_task_cancel(req, -EFAULT);
--
2.24.0
