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naughty: Verify image parameters coming from dbus (FS#1162) 

Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit is contained in:
Uli Schlachter 2013-10-04 11:21:47 +02:00
parent 9b78733922
commit 4368629836
1 changed files with 8 additions and 0 deletions
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8
lib/naughty.lua.in
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@ -556,6 +556,14 @@ if capi.dbus then
-- 7 -> data -- 7 -> data
local w, h, rowstride, _, _, channels, data = unpack(hints.icon_data) local w, h, rowstride, _, _, channels, data = unpack(hints.icon_data)
-- Do the arguments look sane? (e.g. we have enough data)
local expected_length = rowstride * (h - 1) + w * channels
if w < 0 or h < 0 or rowstride < 0 or (channels ~= 3 and channels ~= 4) or
string.len(data) < expected_length then
w = 0
h = 0
end
local format = cairo.Format[channels == 4 and 'ARGB32' or 'RGB24'] local format = cairo.Format[channels == 4 and 'ARGB32' or 'RGB24']
-- Figure out some stride magic (cairo dictates rowstride) -- Figure out some stride magic (cairo dictates rowstride)