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Message-Id: <20220418121210.034580519@linuxfoundation.org>
Date: Mon, 18 Apr 2022 14:11:21 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Dylan Yudaken <dylany@...com>,
Jens Axboe <axboe@...nel.dk>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 112/219] io_uring: verify pad field is 0 in io_get_ext_arg
From: Dylan Yudaken <dylany@...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@...com>
Link: https://lore.kernel.org/r/20220412163042.2788062-5-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.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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