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| author | Eric Dumazet <edumazet@google.com> | 2016-12-01 16:02:06 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-02 21:33:32 +0300 |
| commit | 7f7bf1606fa8fa0e3aecdeac0ba8005f2a0fbdef (patch) | |
| tree | 9e260417519b43992f353d24aeb03c3b278dc00c /kernel/bpf | |
| parent | bd3ad7d3a14b07aeeb4f92abc757672719e2a0eb (diff) | |
| download | linux-7f7bf1606fa8fa0e3aecdeac0ba8005f2a0fbdef.tar.xz | |
mlx4: fix use-after-free in mlx4_en_fold_software_stats()
My recent commit to get more precise rx/tx counters in ndo_get_stats64()
can lead to crashes at device dismantle, as Jesper found out.
We must prevent mlx4_en_fold_software_stats() trying to access
tx/rx rings if they are deleted.
Fix this by adding a test against priv->port_up in
mlx4_en_fold_software_stats()
Calling mlx4_en_fold_software_stats() from mlx4_en_stop_port()
allows us to eventually broadcast the latest/current counters to
rtnetlink monitors.
Fixes: 40931b85113d ("mlx4: give precise rx/tx bytes/packets counters")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-and-bisected-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Cc: Saeed Mahameed <saeedm@dev.mellanox.co.il>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf')
0 files changed, 0 insertions, 0 deletions