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From 69aecdd305defdd014bc92b82acc6000988511cf Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Tue, 13 Jun 2017 09:23:42 -0400
Subject: modesetting: Validate the atom for enum properties
The client could have said anything here, and if what they said doesn't
actually name an atom NameForAtom() will return NULL, and strcmp() will
be unhappy about that.
[copied from xserver d4995a3936ae283b9080fdaa0905daa669ebacfc]
Signed-off-by: Adam Jackson <ajax@redhat.com>
---
src/drmmode_display.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 2b71c9c..04a0b57 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -1081,7 +1081,8 @@ drmmode_output_set_property(xf86OutputPtr output, Atom property,
if (value->type != XA_ATOM || value->format != 32 || value->size != 1)
return FALSE;
memcpy(&atom, value->data, 4);
- name = NameForAtom(atom);
+ if (!(name = NameForAtom(atom)))
+ return FALSE;
/* search for matching name string, then set its value down */
for (j = 0; j < p->mode_prop->count_enums; j++) {
--
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