Bug#983357: Netinst crashes xen domU when loading kernel

From	Phillip Susi <phill@thesusis.net>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#983357: Netinst crashes xen domU when loading kernel
Date	2021-05-19 15:40 +0200
Message-ID	<CguAx-vn-1@gated-at.bofh.it> (permalink)
References	<BLq9Q-i2-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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The discussion upstream does not seem to be converging on a proper fix
in the kernel, so I'm going to clone this bug and suggest that
debian-installer patch the start-udev script to ignore the failure of
the udevadm trigger command.

To summarize: init ends up calling start-udev which calls udevadm
trigger to cold plug all devices.  Both scripts are set -e.  The Xen
Virtual Keyboard driver and at least one other driver have always failed
to trigger due to having absurdly long modalias, but the error used to
be ignored.  The kernel now returns the error to udevadm, so it exits
with an error, so start-udev exits with an error, so init exits with an
error, causing the kernel to panic.

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Bug#983357: Netinst crashes xen domU when loading kernel Phillip Susi <phill@thesusis.net> - 2021-05-19 15:40 +0200
  Bug#983357: Netinst crashes xen domU when loading kernel Cyril Brulebois <kibi@debian.org> - 2021-05-24 06:30 +0200
    Bug#983357: Netinst crashes xen domU when loading kernel Michael Biebl <biebl@debian.org> - 2021-05-24 09:40 +0200
      Bug#983357: Netinst crashes xen domU when loading kernel Phillip Susi <phill@thesusis.net> - 2021-05-25 21:50 +0200
      Bug#983357: Bug#988776: Bug#983357: Netinst crashes xen domU when loading kernel Ben Hutchings <ben@decadent.org.uk> - 2021-08-24 19:20 +0200
        Bug#983357: Bug#988776: Bug#983357: Netinst crashes xen domU when loading kernel Phillip Susi <phill@thesusis.net> - 2021-08-24 21:50 +0200
          Bug#983357: Bug#988776: Bug#983357: Netinst crashes xen domU when loading kernel Ben Hutchings <ben@decadent.org.uk> - 2021-08-25 01:20 +0200
            Bug#983357: Bug#988776: Bug#983357: Netinst crashes xen domU when loading kernel Ben Hutchings <ben@decadent.org.uk> - 2021-08-25 19:00 +0200
            Bug#983357: Bug#988776: Bug#983357: Netinst crashes xen domU when loading kernel Phillip Susi <phill@thesusis.net> - 2021-08-25 22:30 +0200
        Bug#983357: Bug#988776: Bug#983357: Netinst crashes xen domU when loading kernel Ben Hutchings <ben@decadent.org.uk> - 2021-08-25 17:00 +0200

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