tree 41daf867f9247b02952e2310c7df2ae167da7590
parent 9c58ccc148fbd17859fbb05e59d914c2b135105b
author Pavel Begunkov <asml.silence@gmail.com> 1739200897 +0000
committer Michael Kochera <kochera@google.com> 1740006665 -0800

io_uring: fix io_req_prep_async with provided buffers

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.

BUG=b/397181540
TEST=presubmit
RELEASE_NOTE=None

cos-patch: security-high
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: c7fb19428d67d ("io_uring: add support for ring mapped supplied buffers")
Change-Id: Id3dd6ac0b816e6082b5865252fac9cd59dc56b6e
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/93580
Reviewed-by: Anil Altinay <aaltinay@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>