diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-02-14 09:03:51 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-14 15:05:12 -0500 |
| commit | d199fab63c11998a602205f7ee7ff7c05c97164b (patch) | |
| tree | 9977e38c6afb849d7f823820b73d160092415e60 /lib/clz_ctz.c | |
| parent | f39f0d1e1e93145a0e91d9a7a639c42fd037ecc3 (diff) | |
packet: fix races in fanout_add()
Multiple threads can call fanout_add() at the same time.
We need to grab fanout_mutex earlier to avoid races that could
lead to one thread freeing po->rollover that was set by another thread.
Do the same in fanout_release(), for peace of mind, and to help us
finding lockdep issues earlier.
Fixes: dc99f600698d ("packet: Add fanout support.")
Fixes: 0648ab70afe6 ("packet: rollover prepare: per-socket state")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/clz_ctz.c')
0 files changed, 0 insertions, 0 deletions