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io_uring: fix io_req_prep_async with provided buffers

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io_req_prep_async() can import provided buffers, commit the ring state
by giving up on that before, it'll be reimported later if needed.

Reported-by: Muhammad Ramdhan <ramdhan@starlabs.sg>
Reported-by: Bing-Jhong Billy Jheng <billy@starlabs.sg>
Reported-by: Jacob Soo <jacob.soo@starlabs.sg>
Fixes: c7fb19428d ("io_uring: add support for ring mapped supplied buffers")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pavel Begunkov
2025-02-10 15:21:37 +00:00
committed by Greg Kroah-Hartman
parent 130675a219
commit a94592ec30
1 changed files with 4 additions and 1 deletions
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io_uring/io_uring.c
+4 -1
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@@ -1779,6 +1779,7 @@ int io_req_prep_async(struct io_kiocb *req)
{
const struct io_cold_def *cdef = &io_cold_defs[req->opcode];
const struct io_issue_def *def = &io_issue_defs[req->opcode];
int ret;
/* assign early for deferred execution for non-fixed file */
if (def->needs_file && !(req->flags & REQ_F_FIXED_FILE) && !req->file)
@@ -1791,7 +1792,9 @@ int io_req_prep_async(struct io_kiocb *req)
if (io_alloc_async_data(req))
return -EAGAIN;
}
return cdef->prep_async(req);
ret = cdef->prep_async(req);
io_kbuf_recycle(req, 0);
return ret;
}
static u32 io_get_sequence(struct io_kiocb *req)