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| author | Imre Deak <imre.deak@intel.com> | 2014-10-02 16:34:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-05 20:12:02 -0800 |
| commit | 9e326f78713a4421fe11afc2ddeac07698fac131 (patch) | |
| tree | 0b927328171fefe95865293359858a58d8a18f4b /drivers/tty | |
| parent | cd92208f6996f7d190a15eb278e7d02499e2d264 (diff) | |
| download | linux-9e326f78713a4421fe11afc2ddeac07698fac131.tar.gz linux-9e326f78713a4421fe11afc2ddeac07698fac131.tar.bz2 linux-9e326f78713a4421fe11afc2ddeac07698fac131.zip | |
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@intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/vt/consolemap.c | 7 |
1 files changed, 7 insertions, 0 deletions
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; } |