1CVE: CVE-2022-44638 2Upstream-Status: Backport 3Signed-off-by: Ross Burton <ross.burton@arm.com> 4 5From a1f88e842e0216a5b4df1ab023caebe33c101395 Mon Sep 17 00:00:00 2001 6From: Matt Turner <mattst88@gmail.com> 7Date: Wed, 2 Nov 2022 12:07:32 -0400 8Subject: [PATCH] Avoid integer overflow leading to out-of-bounds write 9 10Thanks to Maddie Stone and Google's Project Zero for discovering this 11issue, providing a proof-of-concept, and a great analysis. 12 13Closes: https://gitlab.freedesktop.org/pixman/pixman/-/issues/63 14--- 15 pixman/pixman-trap.c | 2 +- 16 1 file changed, 1 insertion(+), 1 deletion(-) 17 18diff --git a/pixman/pixman-trap.c b/pixman/pixman-trap.c 19index 91766fd..7560405 100644 20--- a/pixman/pixman-trap.c 21+++ b/pixman/pixman-trap.c 22@@ -74,7 +74,7 @@ pixman_sample_floor_y (pixman_fixed_t y, 23 24 if (f < Y_FRAC_FIRST (n)) 25 { 26- if (pixman_fixed_to_int (i) == 0x8000) 27+ if (pixman_fixed_to_int (i) == 0xffff8000) 28 { 29 f = 0; /* saturate */ 30 } 31-- 32GitLab 33 34