From: Pavel Begunkov asml.silence@gmail.com
[ Upstream commit 8f0a24801bb44aa58496945aabb904c729176772 ]
Automatically default rsrc tag in io_queue_rsrc_removal(), it's safer than leaving it there and relying on the rest of the code to behave and not use it.
Signed-off-by: Pavel Begunkov asml.silence@gmail.com Link: https://lore.kernel.org/r/1cf262a50df17478ea25b22494dcc19f3a80301f.164933634... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/io_uring.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 5fc3a62eae72..d49d83a99c9f 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -8419,13 +8419,15 @@ static int io_sqe_file_register(struct io_ring_ctx *ctx, struct file *file, static int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx, struct io_rsrc_node *node, void *rsrc) { + u64 *tag_slot = io_get_tag_slot(data, idx); struct io_rsrc_put *prsrc;
prsrc = kzalloc(sizeof(*prsrc), GFP_KERNEL); if (!prsrc) return -ENOMEM;
- prsrc->tag = *io_get_tag_slot(data, idx); + prsrc->tag = *tag_slot; + *tag_slot = 0; prsrc->rsrc = rsrc; list_add(&prsrc->list, &node->rsrc_list); return 0;