WARNING: at fs/io_uring.c:8578 io_ring_exit_work.cold+0x0/0x18
As reissuing is now passed back by REQ_F_REISSUE, kiocb_done() may just
set the flag and do nothing leaving dangling requests. The handling is a
bit fragile, e.g. can't just complete them because the case of reading
beyond file boundary needs blocking context to return 0, otherwise it
may be -EAGAIN.
Go the easy way for now, just emulate how it was by io_rw_reissue() in
kiocb_done()
Fixes: 230d50d448ac ("io_uring: move reissue into regular IO path")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
fs/io_uring.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index f1881ac0744b..de5822350345 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2762,6 +2762,7 @@ static void kiocb_done(struct kiocb *kiocb, ssize_t ret,
{
struct io_kiocb *req = container_of(kiocb, struct io_kiocb, rw.kiocb);
struct io_async_rw *io = req->async_data;
+ bool check_reissue = (kiocb->ki_complete == io_complete_rw);
/* add previously done IO, if any */
if (io && io->bytes_done > 0) {
@@ -2777,6 +2778,11 @@ static void kiocb_done(struct kiocb *kiocb, ssize_t ret,
__io_complete_rw(req, ret, 0, issue_flags);
else
io_rw_done(kiocb, ret);
+
+ if (check_reissue && req->flags & REQ_F_REISSUE) {
+ req->flags &= ~REQ_F_REISSUE;
+ io_rw_reissue(req);
+ }
}
static int io_import_fixed(struct io_kiocb *req, int rw, struct iov_iter *iter)
--
2.24.0
