Devuan bug report logs - #407
eudev preinst fails to detect availability of requisite kernel features

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Message #5 received at submit@bugs.devuan.org (full text, mbox, reply):

Package: eudev
Version: 3.2.9-7
Severity: normal

Hi,

this code:

  if [ -e /proc/kallsyms ]; then

      local needed_symbols='inotify_init signalfd accept4 open_by_handle_at timerfd_create epoll_create'
      for symbol in $needed_symbols; do
      if ! egrep -q "^[a-fA-F0-9]+ T \.?sys_${symbol}$" /proc/kallsyms; then
          cat <<END
Since release 198, udev requires support for the following features in
the running kernel:

- inotify(2)            (CONFIG_INOTIFY_USER)
- signalfd(2)           (CONFIG_SIGNALFD)
- accept4(2)
- open_by_handle_at(2)  (CONFIG_FHANDLE)
- timerfd_create(2)     (CONFIG_TIMERFD)
- epoll_create(2)       (CONFIG_EPOLL)
END
          exit 1
      fi
      done
  fi

thought that my kernel was missing one of the required features, but in fact I have all of them:

ffffffffab1bd402 T __ia32_sys_inotify_init
ffffffffab1bd402 T __x64_sys_inotify_init
ffffffffab1c1554 T __x64_sys_signalfd
ffffffffab1c1562 T __ia32_sys_signalfd
ffffffffab1c15fb T __ia32_compat_sys_signalfd
ffffffffab1c160d T __x32_compat_sys_signalfd
ffffffffab473fc5 T __sys_accept4
ffffffffab474170 T __x64_sys_accept4
ffffffffab474188 T __ia32_sys_accept4
ffffffffab1d5118 T __ia32_sys_open_by_handle_at
ffffffffab1d512a T __ia32_compat_sys_open_by_handle_at
ffffffffab1d513a T __x32_compat_sys_open_by_handle_at
ffffffffab1d514b T __x64_sys_open_by_handle_at
ffffffffab1c1c84 T __x64_sys_timerfd_create
ffffffffab1c1c91 T __ia32_sys_timerfd_create
ffffffffab1c029d T __ia32_sys_epoll_create
ffffffffab1c02b4 T __x64_sys_epoll_create

The regex is wrong; it should probably be

      if ! egrep -q "^[a-fA-F0-9]+ T .*sys_${symbol}$" /proc/kallsyms; then

This is with a self-built 4.19.23 kernel, fwiw.

-- Package-specific info:

-- System Information:
Init: runit (via /run/runit.stopit)

Best regards,

András

Ps. Please Cc me explicitly if you reply.

-- 
         Some people are like slinkies. Not really good for anything,
     yet you can't help but smile when you see one pushed down the stairs.

Message #10 received at 407@bugs.devuan.org (full text, mbox, reply):

[Message part 1 (text/plain, inline)]

reopen 383
forcemerge 407 383
tags 407 + patch
thanks

After looking a bit more deeply into this I find that it is still open.

It only bites if you are running a too new kernel while upgrading from
someting below 3.2.7-1 to 3.2.7-1 or greater. And while not being chrooted.

I propose the patch of András:

--- ./eudev.preinst     2020-11-07 21:09:24.000000000 +0100
+++ /tmp/eudev.preinst  2021-04-26 18:25:02.970434903 +0200
@@ -18,7 +18,7 @@

       local needed_symbols='inotify_init signalfd accept4 open_by_handle_at timerfd_create epoll_create'
       for symbol in $needed_symbols; do
-      if ! egrep -q "^[a-fA-F0-9]+ T \.?sys_${symbol}$" /proc/kallsyms; then
+      if ! egrep -q "^[a-fA-F0-9]+ T .*sys_${symbol}$" /proc/kallsyms; then
          cat <<END
 Since release 198, udev requires support for the following features in
 the running kernel:

----
It leaves open corner cases but less than the version before.

cu

AW
-- 
[...] If you don't want to be restricted, don't agree to it. If you are
coerced, comply as much as you must to protect yourself, just don't support
it. Noone can free you but yourself. (crag, on Debian Planet)
Arne Wichmann (aw@saar.de)

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Message #28 received at 407-done@bugs.devuan.org (full text, mbox, reply):

Version: 3.2.9-10

Source package eudev (3.2.9-10) added to Devuan suite unstable.

This closes bug report 407.

Thanks

DAK managing the Devuan archive

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Sat, 04 Sep 2021 13:05:24 +0200
Source: eudev
Architecture: source
Version: 3.2.9-10
Distribution: unstable
Urgency: high
Maintainer: Devuan Dev Team <devuan-dev@lists.dyne.org>
Changed-By: Svante Signell <svante.signell@gmail.com>
Closes: 407 598 600
Changes:
 eudev (3.2.9-10) unstable; urgency=high
 .
   * debian/eudev.maintscript: Remove. Fixes build with debhelper 13.5.
   * debian/changelog: Fix indentation and long lines.
   * debian/eudev.preinst: Fix detection of needed kernel features for
     recent kernels. (Closes: #407, #598)
   * debian/control: Remove dependency on debconf.
   * debian/eudev.postrm: Remove db_purge since we no longer use debconf.
     (Closes: #600)
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Message #37 received at 407@bugs.devuan.org (full text, mbox, reply):

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