From c6d521a02d4a12b1fb3aff6694d400905f4a73f7 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 3 Mar 2011 17:56:06 +0100 Subject: [PATCH] keyboard: integer underflow bug commit b652277b09d3d030cb074cc6a98ba80b34244c03 upstream. The "ct" variable should be an unsigned int. Both struct kbdiacrs ->kb_cnt and struct kbd_data ->accent_table_size are unsigned ints. Making it signed causes a problem in KBDIACRUC because the user could set the signed bit and cause a buffer overflow. Signed-off-by: Dan Carpenter Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- drivers/s390/char/keyboard.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/s390/char/keyboard.c b/drivers/s390/char/keyboard.c index cee4d4e42429..1160fca43663 100644 --- a/drivers/s390/char/keyboard.c +++ b/drivers/s390/char/keyboard.c @@ -462,7 +462,8 @@ kbd_ioctl(struct kbd_data *kbd, struct file *file, unsigned int cmd, unsigned long arg) { void __user *argp; - int ct, perm; + unsigned int ct; + int perm; argp = (void __user *)arg; -- 2.39.5