GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-06 14:48:06 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

xen-netfront: avoid crashing on resume after a failure in talk_to_netback()

Browse source 
Unavoidable crashes in netfront_resume() and netback_changed() after a
previous fail in talk_to_netback() (e.g. when we fail to read MAC from
xenstore) were discovered. The failure path in talk_to_netback() does
unregister/free for netdev but we don't reset drvdata and we try accessing
it after resume.

Fix the bug by removing the whole xen device completely with
device_unregister(), this guarantees we won't have any calls into netfront
after a failure.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vitaly Kuznetsov 2017-05-11 13:58:06 +02:00 • committed by David S. Miller
parent cb395b2010
commit d86b5672b1
1 changed files with 1 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/net/xen-netfront.c
View file

@ -1934,8 +1934,7 @@ abort_transaction_no_dev_fatal:
xennet_disconnect_backend(info); xennet_disconnect_backend(info);
xennet_destroy_queues(info); xennet_destroy_queues(info);
out: out:
unregister_netdev(info->netdev); device_unregister(&dev->dev);
xennet_free_netdev(info->netdev);
return err; return err;
} }