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| author | Pavel Begunkov <asml.silence@gmail.com> | 2020-12-21 18:34:04 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-12-21 13:01:10 -0700 |
| commit | a528b04ea40690ff40501f50d618a62a02b19620 (patch) | |
| tree | 424209d36e0dfa0f7aa295cf7cd9c60e599426ef | |
| parent | f57555eda979ca085d2524db81e14b8a6089e15e (diff) | |
| download | linux-a528b04ea40690ff40501f50d618a62a02b19620.tar.bz2 | |
io_uring: fix ignoring xa_store errors
xa_store() may fail, check the result.
Cc: stable@vger.kernel.org # 5.10
Fixes: 0f2122045b946 ("io_uring: don't rely on weak ->files references")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/io_uring.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index fbf747803dbc..846c635d0620 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -8852,10 +8852,9 @@ static void io_uring_cancel_task_requests(struct io_ring_ctx *ctx, static int io_uring_add_task_file(struct io_ring_ctx *ctx, struct file *file) { struct io_uring_task *tctx = current->io_uring; + int ret; if (unlikely(!tctx)) { - int ret; - ret = io_uring_alloc_task_context(current); if (unlikely(ret)) return ret; @@ -8866,7 +8865,12 @@ static int io_uring_add_task_file(struct io_ring_ctx *ctx, struct file *file) if (!old) { get_file(file); - xa_store(&tctx->xa, (unsigned long)file, file, GFP_KERNEL); + ret = xa_err(xa_store(&tctx->xa, (unsigned long)file, + file, GFP_KERNEL)); + if (ret) { + fput(file); + return ret; + } } tctx->last = file; } |