From cecc1fbae879c189739691ecff3df67d20b0899a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Renaud=20M=C3=A9trich?= Date: Tue, 16 Nov 2021 11:15:52 +0100 Subject: [PATCH] fix(shutdown): be robust against forced shutdown When a forced shutdown is issued through sending a burst of Ctrl-Alt-Del keys, systemd sends SIGTERM to all processes. This ends up killing dracut-initramfs-restore as well, preventing the script from detecting that the unpack of the initramfs is incomplete, which later causes a crash to happen when "shutdown" tries to execute from the unpacked initramfs. This fix makes sure dracut-initramfs-restore remains alive to detect the unpack failed (because cpio was killed by systemd too). Refs: * https://bugzilla.redhat.com/show_bug.cgi?id=2023665 (cherry picked from commit b9ba3c8bb8f0f1328cd1ffaa8dbf64585b28c474) Resolves: #2024502 --- dracut-initramfs-restore.sh | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/dracut-initramfs-restore.sh b/dracut-initramfs-restore.sh index abe6b1e2..d97030a3 100644 --- a/dracut-initramfs-restore.sh +++ b/dracut-initramfs-restore.sh @@ -6,6 +6,11 @@ set -e [ -e /run/initramfs/bin/sh ] && exit 0 [ -e /run/initramfs/.need_shutdown ] || exit 0 +# SIGTERM signal is received upon forced shutdown: ignore the signal +# We want to remain alive to be able to trap unpacking errors to avoid +# switching root to an incompletely unpacked initramfs +trap 'echo "Received SIGTERM signal, ignoring!" >&2' TERM + KERNEL_VERSION="$(uname -r)" [[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut