From: Dan Carpenter <dan.carpenter@oracle.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Cox <alan@linux.intel.com>
Cc: Jovi Zhang <bookjovi@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] vt: NULL dereference in vt_do_kdsk_ioctl()
Date: Sat, 10 Mar 2012 11:59:23 +0300 [thread overview]
Message-ID: <20120310085923.GD4647@elgon.mountain> (raw)
We forgot to set the "key_map" variable here, so it's still NULL. This
was introduced recently in 079c9534a9 "vt:tackle kbd_table".
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index 70d0593..86dd1e3 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -1863,6 +1863,7 @@ int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
return -EPERM;
}
key_maps[s] = new_map;
+ key_map = new_map;
key_map[0] = U(K_ALLOCATED);
for (j = 1; j < NR_KEYS; j++)
key_map[j] = U(K_HOLE);
next reply other threads:[~2012-03-10 8:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-10 8:59 Dan Carpenter [this message]
2012-03-10 12:45 ` Alan Cox
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