This is a note to let you know that I've just added the patch titled
tty/vt: don't set font mappings on vc not supporting this
to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From 9e326f78713a4421fe11afc2ddeac07698fac131 Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@xxxxxxxxx>
Date: Thu, 2 Oct 2014 16:34:31 +0300
Subject: tty/vt: don't set font mappings on vc not supporting this
We can call this function for a dummy console that doesn't support
setting the font mapping, which will result in a null ptr BUG. So check
for this case and return error for consoles w/o font mapping support.
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=59321
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/vt/consolemap.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index 610b720d3b91..59b25e039968 100644
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -539,6 +539,12 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
/* Save original vc_unipagdir_loc in case we allocate a new one */
p = *vc->vc_uni_pagedir_loc;
+
+ if (!p) {
+ err = -EINVAL;
+
+ goto out_unlock;
+ }
if (p->refcount > 1) {
int j, k;
@@ -623,6 +629,7 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
set_inverse_transl(vc, p, i); /* Update inverse translations */
set_inverse_trans_unicode(vc, p);
+out_unlock:
console_unlock();
return err;
}
--
2.1.3
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