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authorJens Axboe <axboe@kernel.dk>2020-01-13 19:23:24 -0700
committerJens Axboe <axboe@kernel.dk>2020-01-13 19:25:29 -0700
commit74566df3a71c1b92da608868cca787557d8be7b2 (patch)
tree997c1dad8033b31b8898501b14be2082bc8ac7e2 /fs
parenteacc6dfaea963ef61540abb31ad7829be5eff284 (diff)
io_uring: don't setup async context for read/write fixed
We don't need it, and if we have it, then the retry handler will attempt to copy the non-existent iovec with the inline iovec, with a segment count that doesn't make sense. Fixes: f67676d160c6 ("io_uring: ensure async punted read/write requests copy iovec") Reported-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
-rw-r--r--fs/io_uring.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 38b54051facd..8321c2f5589b 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1786,6 +1786,9 @@ static int io_setup_async_rw(struct io_kiocb *req, ssize_t io_size,
struct iovec *iovec, struct iovec *fast_iov,
struct iov_iter *iter)
{
+ if (req->opcode == IORING_OP_READ_FIXED ||
+ req->opcode == IORING_OP_WRITE_FIXED)
+ return 0;
if (!req->io && io_alloc_async_ctx(req))
return -ENOMEM;

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