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Subject[PATCH 1/6] io_uring: fix flush req->refs underflow
Date
In io_uring_cancel_files(), after refcount_sub_and_test() leaves 0
req->refs, it calls io_put_req(), which would also put a ref. Call
io_free_req() instead.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index bf75ac753b9d..42b5603ee410 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7534,7 +7534,7 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx,
* all we had, then we're done with this request.
*/
if (refcount_sub_and_test(2, &cancel_req->refs)) {
- io_put_req(cancel_req);
+ io_free_req(cancel_req);
finish_wait(&ctx->inflight_wait, &wait);
continue;
}
--
2.24.0
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