io_uring/register: drop redundant submitter_task check

For IORING_SETUP_SINGLE_ISSUER io_ring_ctx's, io_register_resize_rings()
checks that the current task is the ctx's submitter_task. However, its
caller __io_uring_register() already checks this. Drop the redundant
check in io_register_resize_rings().

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Link: https://lore.kernel.org/r/20250902215108.1925105-1-csander@purestorage.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/io_uring/register.c b/io_uring/register.c
index a1a9b2884eae5e76e03c4535e8c935788d9bca3e..aa5f56ad83584c443620b50eccbd4bc0498a8eb1 100644 (file)
--- a/io_uring/register.c
+++ b/io_uring/register.c
@@ -408,10 +408,6 @@ static int io_register_resize_rings(struct io_ring_ctx *ctx, void __user *arg)
        struct io_uring_params p;
        int ret;
 
-       /* for single issuer, must be owner resizing */
-       if (ctx->flags & IORING_SETUP_SINGLE_ISSUER &&
-           current != ctx->submitter_task)
-               return -EEXIST;
        /* limited to DEFER_TASKRUN for now */
        if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN))
                return -EINVAL;