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io_uring: fix ignoring xa_store errors 

xa_store() may fail, check the result.

Cc: stable@vger.kernel.org # 5.10
Fixes: 0f2122045b ("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>
This commit is contained in:
Pavel Begunkov 2020-12-21 18:34:04 +00:00 committed by Jens Axboe
parent f57555eda9
commit a528b04ea4
1 changed files with 7 additions and 3 deletions
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10
fs/io_uring.c
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@ -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;
}