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| author | Jens Axboe <axboe@kernel.dk> | 2020-06-04 11:27:01 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-06-04 11:45:29 -0600 |
| commit | dddb3e26f6d88c5344d28cb5ff9d3d6fa05c4f7a (patch) | |
| tree | 8f60fd47f8931bbce5dcf68dab026389c8d7b0bb /fs/io_uring.c | |
| parent | d2b6f48b691ed67569786c332f0173b918d3fd1b (diff) | |
| download | lwn-dddb3e26f6d88c5344d28cb5ff9d3d6fa05c4f7a.tar.gz lwn-dddb3e26f6d88c5344d28cb5ff9d3d6fa05c4f7a.zip | |
io_uring: re-set iov base/len for buffer select retry
We already have the buffer selected, but we should set the iter list
again.
Cc: stable@vger.kernel.org # v5.7
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index d2bd82387a4c..70f0f2f940fb 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2363,8 +2363,14 @@ static ssize_t __io_iov_buffer_select(struct io_kiocb *req, struct iovec *iov, static ssize_t io_iov_buffer_select(struct io_kiocb *req, struct iovec *iov, bool needs_lock) { - if (req->flags & REQ_F_BUFFER_SELECTED) + if (req->flags & REQ_F_BUFFER_SELECTED) { + struct io_buffer *kbuf; + + kbuf = (struct io_buffer *) (unsigned long) req->rw.addr; + iov[0].iov_base = u64_to_user_ptr(kbuf->addr); + iov[0].iov_len = kbuf->len; return 0; + } if (!req->rw.len) return 0; else if (req->rw.len > 1) |