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xwayland: Check return of xcb_get_property_reply() before deref

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The man pages indicate this routine can return NULL on certain error
conditions.

Suggested by Marek Chalupa

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Marek Chalupa <mchqwerty@gmail.com>
This commit is contained in:
Bryce Harrington
2015-07-09 21:30:16 -07:00
parent cf7d95a688
commit b2d79d504e
1 changed files with 6 additions and 0 deletions
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xwayland/selection.c
+6
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@@ -111,6 +111,8 @@ weston_wm_get_incr_chunk(struct weston_wm *wm)
0x1fffffff /* length */);
reply = xcb_get_property_reply(wm->conn, cookie, NULL);
if (reply == NULL)
return;
dump_property(wm, wm->atom.wl_selection, reply);
@@ -184,6 +186,8 @@ weston_wm_get_selection_targets(struct weston_wm *wm)
4096 /* length */);
reply = xcb_get_property_reply(wm->conn, cookie, NULL);
if (reply == NULL)
return;
dump_property(wm, wm->atom.wl_selection, reply);
@@ -236,6 +240,8 @@ weston_wm_get_selection_data(struct weston_wm *wm)
0x1fffffff /* length */);
reply = xcb_get_property_reply(wm->conn, cookie, NULL);
if (reply == NULL)
return;
if (reply->type == wm->atom.incr) {
dump_property(wm, wm->atom.wl_selection, reply);