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| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-03-17 05:03:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-03-17 05:24:28 +0300 |
| commit | 3b2b78a8eb7cc38d207c5ee516769bc3f44d19ea (patch) | |
| tree | 79ad7c4f3fb3eabfec5e4e562330ac0b4747d0fc /fs/io_uring.c | |
| parent | 6695490dc85781fe98b782f36f27c13710dbc921 (diff) | |
| download | linux-3b2b78a8eb7cc38d207c5ee516769bc3f44d19ea.tar.xz | |
io_uring: extend provided buf return to fails
It's never a good idea to put provided buffers without notifying the
userspace, it'll lead to userspace leaks, so add io_put_kbuf() in
io_req_complete_failed(). The fail helper is called by all sorts of
requests, but it's still safe to do as io_put_kbuf() will return 0 in
for all requests that don't support and so don't expect provided buffers.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/a4880106fcf199d5810707fe2d17126fcdf18bc4.1647481208.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 15de14d4331b..a90844bf9b9c 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2124,7 +2124,7 @@ static inline void io_req_complete(struct io_kiocb *req, s32 res) static void io_req_complete_failed(struct io_kiocb *req, s32 res) { req_set_fail(req); - io_req_complete_post(req, res, 0); + io_req_complete_post(req, res, io_put_kbuf(req, 0)); } static void io_req_complete_fail_submit(struct io_kiocb *req) |