Commit 9e326f78 authored by Imre Deak's avatar Imre Deak Committed by Greg Kroah-Hartman

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: default avatarImre Deak <>
Cc: stable <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent cd92208f
......@@ -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);
return err;
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