[PATCH net v3 0/6] ipv6: fix error handling in disable_ipv6 sysctl

[Fernando Fernandez Mancera <fmancera@suse.de>]

While working on a different IPv6 patch series I have spotted multiple
minor bugs around sysctl error handling and notifications. In general,
they are not serious issues.

In addition, there is one more issue in forwarding sysctl as it does not
check for CAP_NET_ADMIN for the namespace. I am keeping that patch out
of this series and I am aiming it at the net-next tree once it re-opens.

During v3, Ido's pointed out that it is unnecessary to reset the
position pointer when the return value is negative as at
new_sync_write() the ppos is only advanced when ret return value is
positive. That means we can get rid of that operation in ipv4/ipv6
sysctls. That is going to be sent to net-next too.

Changes:
  v3: Patch 7: dropped from the series based on Ido's feedback

  v2: https://lore.kernel.org/netdev/20260620161850.7114-1-fmancera@suse.de/
      Patch 3: fix return code of addrconf_fixup_forwarding()
      Patch 5: acquire lock before calling proc_dointvec()
      Patch 7: new on this revision of the series

Fernando Fernandez Mancera (6):
  ipv6: fix error handling in disable_ipv6 sysctl
  ipv6: fix error handling in ignore_routes_with_linkdown sysctl
  ipv6: fix error handling in forwarding sysctl
  ipv6: fix error handling in disable_policy sysctl
  ipv6: fix state corruption during proxy_ndp sysctl restart
  ipv6: fix missing notification for ignore_routes_with_linkdown

 net/ipv6/addrconf.c | 42 ++++++++++++++++++++++++++++--------------
 1 file changed, 28 insertions(+), 14 deletions(-)

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2.54.0