| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.17 112/219] io_uring: verify pad field is 0 in io_get_ext_arg | Date | Mon, 18 Apr 2022 14:11:21 +0200 |
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From: Dylan Yudaken <dylany@fb.com>
[ 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 <dylany@fb.com> Link: https://lore.kernel.org/r/20220412163042.2788062-5-dylany@fb.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org> --- fs/io_uring.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 2838bc6cdbc8..7a652c8eeed2 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -10109,6 +10109,8 @@ 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); -- 2.35.1
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