We put this workaround in 2008 and the offending userspace has been fixed
up long time ago; the link in the message is no longer valid either, so it
is time to retire it.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/input/evdev.c | 18 ------------------
1 file changed, 18 deletions(-)
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index ce953d8..fd325ec 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -629,12 +629,10 @@ static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
return copy_to_user(p, str, len) ? -EFAULT : len;
}
-#define OLD_KEY_MAX 0x1ff
static int handle_eviocgbit(struct input_dev *dev,
unsigned int type, unsigned int size,
void __user *p, int compat_mode)
{
- static unsigned long keymax_warn_time;
unsigned long *bits;
int len;
@@ -652,24 +650,8 @@ static int handle_eviocgbit(struct input_dev *dev,
default: return -EINVAL;
}
- /*
- * Work around bugs in userspace programs that like to do
- * EVIOCGBIT(EV_KEY, KEY_MAX) and not realize that 'len'
- * should be in bytes, not in bits.
- */
- if (type == EV_KEY && size == OLD_KEY_MAX) {
- len = OLD_KEY_MAX;
- if (printk_timed_ratelimit(&keymax_warn_time, 10 * 1000))
- pr_warning("(EVIOCGBIT): Suspicious buffer size %u, "
- "limiting output to %zu bytes. See "
- "http://userweb.kernel.org/~dtor/eviocgbit-bug.html\n";,
- OLD_KEY_MAX,
- BITS_TO_LONGS(OLD_KEY_MAX) * sizeof(long));
- }
-
return bits_to_user(bits, len, size, p, compat_mode);
}
-#undef OLD_KEY_MAX
static int evdev_handle_get_keycode(struct input_dev *dev, void __user *p)
{
--
1.9.0
--
Dmitry
--
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