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| author |   Pavel Begunkov <asml.silence@gmail.com> | 2020-05-01 17:09:37 +0300 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-05-01 08:50:30 -0600 |
| commit | 4ee3631451c9a62e6b6bc7ee51fb9a5b34e33509 (patch) | |
| tree | 240096f00b0440988e2e5a83802d9b98f9497986 /fs | |
| parent | io_uring: fix extra put in sync_file_range() (diff) | |
| download | wireguard-linux-4ee3631451c9a62e6b6bc7ee51fb9a5b34e33509.tar.xz wireguard-linux-4ee3631451c9a62e6b6bc7ee51fb9a5b34e33509.zip | |
io_uring: check non-sync defer_list carefully
io_req_defer() do double-checked locking. Use proper helpers for that,
i.e. list_empty_careful().
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 7f10af02c3d1..91ddc27b5173 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5031,7 +5031,7 @@ static int io_req_defer(struct io_kiocb *req, const struct io_uring_sqe *sqe) int ret; /* Still need defer if there is pending req in defer list. */ - if (!req_need_defer(req) && list_empty(&ctx->defer_list)) + if (!req_need_defer(req) && list_empty_careful(&ctx->defer_list)) return 0; if (!req->io && io_alloc_async_ctx(req)) |