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io_uring: move io_uring_rsrc_update2 validation

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Move validation to be more consistently straight after
copy_from_user. This is already done in io_register_rsrc_update and so
this removes that redundant check.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220412163042.2788062-2-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dylan Yudaken 2022-04-12 09:30:39 -07:00 committed by Jens Axboe
parent 0f8da75b51
commit 565c5e616e
1 changed files with 2 additions and 2 deletions
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4
fs/io_uring.c
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@ -11398,8 +11398,6 @@ static int __io_register_rsrc_update(struct io_ring_ctx *ctx, unsigned type,
__u32 tmp;
int err;
if (up->resv)
return -EINVAL;
if (check_add_overflow(up->offset, nr_args, &tmp))
return -EOVERFLOW;
err = io_rsrc_node_switch_start(ctx);
@ -11425,6 +11423,8 @@ static int io_register_files_update(struct io_ring_ctx *ctx, void __user *arg,
memset(&up, 0, sizeof(up));
if (copy_from_user(&up, arg, sizeof(struct io_uring_rsrc_update)))
return -EFAULT;
if (up.resv)
return -EINVAL;
return __io_register_rsrc_update(ctx, IORING_RSRC_FILE, &up, nr_args);
}