6.8-stable review patch. If anyone has any objections, please let me know.
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From: Jens Axboe axboe@kernel.dk
[ Upstream commit f3a640cca951ef9715597e68f5363afc0f452a88 ]
If we get a request with IOSQE_ASYNC set, then we first run the prep async handlers. But if we then fail setting it up and want to post a CQE with -EINVAL, we use ->done_io. This was previously guarded with REQ_F_PARTIAL_IO, and the normal setup handlers do set it up before any potential errors, but we need to cover the async setup too.
Fixes: 9817ad85899f ("io_uring/net: remove dependency on REQ_F_PARTIAL_IO for sr->done_io") Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- io_uring/net.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/io_uring/net.c b/io_uring/net.c index 099ab92cca0b7..dbabe0058f1cb 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -311,7 +311,10 @@ int io_send_prep_async(struct io_kiocb *req) struct io_async_msghdr *io; int ret;
- if (!zc->addr || req_has_async_data(req)) + if (req_has_async_data(req)) + return 0; + zc->done_io = 0; + if (!zc->addr) return 0; io = io_msg_alloc_async_prep(req); if (!io) @@ -338,8 +341,10 @@ static int io_setup_async_addr(struct io_kiocb *req,
int io_sendmsg_prep_async(struct io_kiocb *req) { + struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); int ret;
+ sr->done_io = 0; if (!io_msg_alloc_async_prep(req)) return -ENOMEM; ret = io_sendmsg_copy_hdr(req, req->async_data); @@ -586,9 +591,11 @@ static int io_recvmsg_copy_hdr(struct io_kiocb *req,
int io_recvmsg_prep_async(struct io_kiocb *req) { + struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); struct io_async_msghdr *iomsg; int ret;
+ sr->done_io = 0; if (!io_msg_alloc_async_prep(req)) return -ENOMEM; iomsg = req->async_data;