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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2017-05-11 13:58:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-09 22:01:57 +0100 |
| commit | 3671e6728f796dee5c557f0782725eeb6a9ad721 (patch) | |
| tree | 30f81c86f533b5693b423601d1a9f7f3e9536246 /Documentation/circular-buffers.txt | |
| parent | 08dd03812e8b1dba97eb00092a8cfbe8a7ebc13c (diff) | |
xen-netfront: avoid crashing on resume after a failure in talk_to_netback()
commit d86b5672b1adb98b4cdd6fbf0224bbfb03db6e2e upstream.
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>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/circular-buffers.txt')
0 files changed, 0 insertions, 0 deletions