Messages in this thread Patch in this message | | | From | Ricky Liang <> | Subject | [PATCH v2] Input: uinput - handle compat ioctl for UI_SET_PHYS | Date | Sat, 21 May 2016 01:50:46 +0800 |
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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> --- drivers/input/misc/uinput.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c index abe1a92..65ebbd1 100644 --- a/drivers/input/misc/uinput.c +++ b/drivers/input/misc/uinput.c @@ -981,9 +981,15 @@ 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 -- 2.1.2
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