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io_uring: use mem_is_zero to check ring params 

mem_is_zero() does the job without hand rolled loops, use that to verify
reserved fields of ring params.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2025-11-10 13:04:51 +00:00 committed by Jens Axboe
parent 7bb21a52e2
commit 01405895c1
1 changed files with 3 additions and 5 deletions
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6
io_uring/io_uring.c
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@ -3684,14 +3684,12 @@ static __cold int io_uring_create(struct io_uring_params *p,
static long io_uring_setup(u32 entries, struct io_uring_params __user *params) static long io_uring_setup(u32 entries, struct io_uring_params __user *params)
{ {
struct io_uring_params p; struct io_uring_params p;
int i;
if (copy_from_user(&p, params, sizeof(p))) if (copy_from_user(&p, params, sizeof(p)))
return -EFAULT; return -EFAULT;
for (i = 0; i < ARRAY_SIZE(p.resv); i++) {
if (p.resv[i]) if (!mem_is_zero(&p.resv, sizeof(p.resv)))
return -EINVAL; return -EINVAL;
}
if (p.flags & ~IORING_SETUP_FLAGS) if (p.flags & ~IORING_SETUP_FLAGS)
return -EINVAL; return -EINVAL;