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io_uring: allow SQPOLL without CAP_SYS_ADMIN or CAP_SYS_NICE

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Now that we have any worker being attached to the original task as
threads, accounting of CPU time is directly attributed to the original
task as well. This means that we no longer have to restrict SQPOLL to
needing elevated privileges, as it's really no different from just having
the task spawn a busy looping thread in userspace.

Reported-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-03-25 10:21:35 -06:00
parent 685fe7feed
commit 548d819d1e
1 changed files with 0 additions and 4 deletions
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4
fs/io_uring.c
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@ -8011,10 +8011,6 @@ static int io_sq_offload_create(struct io_ring_ctx *ctx,
struct io_sq_data *sqd;
bool attached;
ret = -EPERM;
if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_NICE))
goto err;
sqd = io_get_sq_data(p, &attached);
if (IS_ERR(sqd)) {
ret = PTR_ERR(sqd);