From 4d1af904207d10436561fb228e2abeb653ee73ea Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Mon, 6 Apr 2026 15:14:01 +0000
Subject: [PATCH] fix: better compatibility under busybox, silence buggy unzlma
 versions (fix #432)
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 built from commit fc34cb729b802d1ea40f8d039381bead971ca1af
 dated 2026-04-06 17:12:21 +0200
 by Stéphane Lesimple (speed47_github@speed47.net)
---
 spectre-meltdown-checker.sh | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/spectre-meltdown-checker.sh b/spectre-meltdown-checker.sh
index 11e7182..213fe79 100755
--- a/spectre-meltdown-checker.sh
+++ b/spectre-meltdown-checker.sh
@@ -13,7 +13,7 @@
 #
 # Stephane Lesimple
 #
-VERSION='26.32.0406626'
+VERSION='26.32.0406634'
 
 # --- Common paths and basedirs ---
 readonly VULN_SYSFS_BASE="/sys/devices/system/cpu/vulnerabilities"
@@ -2562,7 +2562,9 @@ try_decompress() {
         fi
         pos=${pos%%:*}
         # shellcheck disable=SC2086
-        tail -c+$pos "$6" 2>/dev/null | $3 $4 >"$g_kerneltmp" 2>/dev/null
+        # wrap in subshell so that if $3 segfaults (e.g. old BusyBox unlzma on random data),
+        # the "Segmentation fault" message printed by the shell goes to /dev/null
+        (tail -c+$pos "$6" 2>/dev/null | $3 $4 >"$g_kerneltmp" 2>/dev/null) 2>/dev/null
         ret=$?
         if [ ! -s "$g_kerneltmp" ]; then
             # don't rely on $ret, sometimes it's != 0 but worked
@@ -11248,7 +11250,7 @@ if [ -n "$g_mockme" ] && [ "$opt_mock" = 1 ]; then
         # not a useless use of cat: gzipping cpuinfo directly doesn't work well
         # shellcheck disable=SC2002
         if command -v "base64" >/dev/null 2>&1; then
-            g_mock_cpuinfo="$(cat /proc/cpuinfo | gzip -c | base64 -w0)"
+            g_mock_cpuinfo="$(cat /proc/cpuinfo | gzip -c | base64 | tr -d '\n')"
         elif command -v "uuencode" >/dev/null 2>&1; then
             g_mock_cpuinfo="$(cat /proc/cpuinfo | gzip -c | uuencode -m - | grep -Fv 'begin-base64' | grep -Fxv -- '====' | tr -d "\n")"
         fi