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@xxxxxxxxxxxx>
---
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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