diff options
| author | Jens Axboe <axboe@kernel.dk> | 2021-02-24 05:17:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-25 11:04:13 +0300 |
| commit | 3c08f772ad0db70876021aa5d276e14747f77512 (patch) | |
| tree | cc670d0d8252e6ce25720e340adee402edcbea22 /fs/io_uring.c | |
| parent | 40345b9c9d90684cb546fdc51de6b4bd18343ae5 (diff) | |
| download | linux-3c08f772ad0db70876021aa5d276e14747f77512.tar.xz | |
io_uring: don't attempt IO reissue from the ring exit path
[ Upstream commit 7c977a58dc83366e488c217fd88b1469d242bee5 ]
If we're exiting the ring, just let the IO fail with -EAGAIN as nobody
will care anyway. It's not the right context to reissue from.
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 5746998799ab..7625b3e2db2c 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2617,6 +2617,13 @@ static bool io_rw_reissue(struct io_kiocb *req, long res) return false; if ((res != -EAGAIN && res != -EOPNOTSUPP) || io_wq_current_is_worker()) return false; + /* + * If ref is dying, we might be running poll reap from the exit work. + * Don't attempt to reissue from that path, just let it fail with + * -EAGAIN. + */ + if (percpu_ref_is_dying(&req->ctx->refs)) + return false; ret = io_sq_thread_acquire_mm(req->ctx, req); |