Commit 3cfc8e5f authored May 20, 2016 by Ricky Liang Committed by Sasha Levin Jun 06, 2016

Input: uinput - handle compat ioctl for UI_SET_PHYS



[ Upstream commit affa80bd97f7ca282d1faa91667b3ee9e4c590e6 ]

When running a 32-bit userspace on a 64-bit kernel, the UI_SET_PHYS
ioctl needs to be treated with special care, as it has the pointer
size encoded in the command.

Signed-off-by: Ricky Liang <jcliang@chromium.org>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

parent 4ccd5ccb

drivers/input/misc/uinput.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -895,9 +895,15 @@ static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
		}

		#ifdef CONFIG_COMPAT

		#define UI_SET_PHYS_COMPAT _IOW(UINPUT_IOCTL_BASE, 108, compat_uptr_t)

		static long uinput_compat_ioctl(struct file *file,
		unsigned int cmd, unsigned long arg)
		{
		if (cmd == UI_SET_PHYS_COMPAT)
		cmd = UI_SET_PHYS;

		return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg));
		}
		#endif