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由 Xiaoguang Wang 提交于
If copy_to_user() in io_uring_setup() failed, we'll leak many kernel resources, which will be recycled until process terminates. This bug can be reproduced by using mprotect to set params to PROT_READ. To fix this issue, refactor io_uring_create() a bit to add a new 'struct io_uring_params __user *params' parameter and move the copy_to_user() in io_uring_setup() to io_uring_setup(), if copy_to_user() failed, we can free kernel resource properly. Suggested-by: NJens Axboe <axboe@kernel.dk> Signed-off-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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