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| author | Willem de Bruijn <willemb@google.com> | 2019-05-31 19:37:23 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-06-03 04:10:14 +0300 |
| commit | afa0925c6fcc6a8f610e996ca09bc3215048033c (patch) | |
| tree | 626dcaed42ebd07593d937544ee61346102ea05c /virt/lib | |
| parent | 8c268598192df9a07ca967f6a8d5f12c3c1b3888 (diff) | |
| download | linux-afa0925c6fcc6a8f610e996ca09bc3215048033c.tar.xz | |
packet: unconditionally free po->rollover
Rollover used to use a complex RCU mechanism for assignment, which had
a race condition. The below patch fixed the bug and greatly simplified
the logic.
The feature depends on fanout, but the state is private to the socket.
Fanout_release returns f only when the last member leaves and the
fanout struct is to be freed.
Destroy rollover unconditionally, regardless of fanout state.
Fixes: 57f015f5eccf2 ("packet: fix crash in fanout_demux_rollover()")
Reported-by: syzbot <syzkaller@googlegroups.com>
Diagnosed-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'virt/lib')
0 files changed, 0 insertions, 0 deletions