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From 18f91b950e22c2a342a4fbc55e9ddf7534a707d2 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Wed, 13 Jul 2022 11:23:09 +1000
Subject: xkb: fix some possible memleaks in XkbGetKbdByName
GetComponentByName returns an allocated string, so let's free that if we
fail somewhere.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
xkb/xkb.c | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/xkb/xkb.c b/xkb/xkb.c
index 4692895db..b79a269e3 100644
--- a/xkb/xkb.c
+++ b/xkb/xkb.c
@@ -5935,18 +5935,32 @@ ProcXkbGetKbdByName(ClientPtr client)
xkb = dev->key->xkbInfo->desc;
status = Success;
str = (unsigned char *) &stuff[1];
- if (GetComponentSpec(&str, TRUE, &status)) /* keymap, unsupported */
- return BadMatch;
+ {
+ char *keymap = GetComponentSpec(&str, TRUE, &status); /* keymap, unsupported */
+ if (keymap) {
+ free(keymap);
+ return BadMatch;
+ }
+ }
names.keycodes = GetComponentSpec(&str, TRUE, &status);
names.types = GetComponentSpec(&str, TRUE, &status);
names.compat = GetComponentSpec(&str, TRUE, &status);
names.symbols = GetComponentSpec(&str, TRUE, &status);
names.geometry = GetComponentSpec(&str, TRUE, &status);
- if (status != Success)
+ if (status == Success) {
+ len = str - ((unsigned char *) stuff);
+ if ((XkbPaddedSize(len) / 4) != stuff->length)
+ status = BadLength;
+ }
+
+ if (status != Success) {
+ free(names.keycodes);
+ free(names.types);
+ free(names.compat);
+ free(names.symbols);
+ free(names.geometry);
return status;
- len = str - ((unsigned char *) stuff);
- if ((XkbPaddedSize(len) / 4) != stuff->length)
- return BadLength;
+ }
CHK_MASK_LEGAL(0x01, stuff->want, XkbGBN_AllComponentsMask);
CHK_MASK_LEGAL(0x02, stuff->need, XkbGBN_AllComponentsMask);
--
cgit v1.2.1
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