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| author | Pavel Begunkov <asml.silence@gmail.com> | 2020-05-30 14:19:15 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-30 07:38:32 -0600 |
| commit | 7b53d59859bc932b37895d2d37388e7fa29af7a5 (patch) | |
| tree | bc0064c885bdb7b47054841c298c50193190c676 /fs/io_uring.c | |
| parent | bfe68a221905de37e65394a6d58c1e5f3e545d2f (diff) | |
| download | lwn-7b53d59859bc932b37895d2d37388e7fa29af7a5.tar.gz lwn-7b53d59859bc932b37895d2d37388e7fa29af7a5.zip | |
io_uring: fix overflowed reqs cancellation
Overflowed requests in io_uring_cancel_files() should be shed only of
inflight and overflowed refs. All other left references are owned by
someone else.
If refcount_sub_and_test() fails, it will go further and put put extra
ref, don't do that. Also, don't need to do io_wq_cancel_work()
for overflowed reqs, they will be let go shortly anyway.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 9f11feb8a3ac..732ec73ec3c0 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -7449,10 +7449,11 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx, finish_wait(&ctx->inflight_wait, &wait); continue; } + } else { + io_wq_cancel_work(ctx->io_wq, &cancel_req->work); + io_put_req(cancel_req); } - io_wq_cancel_work(ctx->io_wq, &cancel_req->work); - io_put_req(cancel_req); schedule(); finish_wait(&ctx->inflight_wait, &wait); } |