From 9947548d9cef58f6be28b7bb0be53138626ff319 Mon Sep 17 00:00:00 2001 From: Dylan Yudaken Date: Tue, 12 Apr 2022 09:30:42 -0700 Subject: io_uring: verify pad field is 0 in io_get_ext_arg [ Upstream commit d2347b9695dafe5c388a5f9aeb70e27a7a4d29cf ] Ensure that only 0 is passed for pad here. Fixes: c73ebb685fb6 ("io_uring: add timeout support for io_uring_enter()") Signed-off-by: Dylan Yudaken Link: https://lore.kernel.org/r/20220412163042.2788062-5-dylany@fb.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- fs/io_uring.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs') diff --git a/fs/io_uring.c b/fs/io_uring.c index 66671c0bd864..cc0a07a9fe9c 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -9981,6 +9981,8 @@ static int io_get_ext_arg(unsigned flags, const void __user *argp, size_t *argsz return -EINVAL; if (copy_from_user(&arg, argp, sizeof(arg))) return -EFAULT; + if (arg.pad) + return -EINVAL; *sig = u64_to_user_ptr(arg.sigmask); *argsz = arg.sigmask_sz; *ts = u64_to_user_ptr(arg.ts); -- cgit v1.2.3