net: sched: matchall: verify that filter is not NULL in mall_walk()

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Check that filter is not NULL before passing it to tcf_walker->fn()
callback. This can happen when mall_change() failed to offload filter to
hardware.

Fixes: ed76f5edcc ("net: sched: protect filter_chain list with filter_chain_lock mutex")
Reported-by: Ido Schimmel <idosch@mellanox.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Vlad Buslov 2019-02-15 17:17:56 +02:00 • committed by David S. Miller

parent 3027ff41f6

commit d66022cd16

1 changed files with 3 additions and 0 deletions

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net/sched/cls_matchall.c

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