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cssselector: Ensure we do not index out of bounds

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This would only happen if the last element was deprecated, but it should
be avoided anyway.

CID 1388852 (#1 of 1): Out-of-bounds read (OVERRUN)
12. overrun-local: Overrunning array pseudo_classes of 16 32-byte
elements at element index 16 (byte offset 512) using index i + 1U (which
evaluates to 16).
This commit is contained in:
Daniel Boles 2017-08-01 19:57:51 +01:00
parent a381a06b12
commit 6063a89235
1 changed files with 3 additions and 2 deletions
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5
gtk/gtkcssselector.c
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@ -1142,8 +1142,8 @@ parse_selector_pseudo_class (GtkCssParser *parser,
{ "visited", 0, GTK_STATE_FLAG_VISITED, },
{ "checked", 0, GTK_STATE_FLAG_CHECKED, },
{ "drop(active)", 0, GTK_STATE_FLAG_DROP_ACTIVE, }
};
guint i;
if (_gtk_css_parser_try (parser, "nth-child", FALSE))
@ -1163,7 +1163,8 @@ parse_selector_pseudo_class (GtkCssParser *parser,
selector->state.state = pseudo_classes[i].state_flag;
if (pseudo_classes[i].deprecated)
{
if (pseudo_classes[i + 1].state_flag == pseudo_classes[i].state_flag)
if (i + 1 < G_N_ELEMENTS (pseudo_classes) &&
pseudo_classes[i + 1].state_flag == pseudo_classes[i].state_flag)
_gtk_css_parser_error_full (parser,
GTK_CSS_PROVIDER_ERROR_DEPRECATED,
"The :%s pseudo-class is deprecated. Use :%s instead.",