net: sched: fix possible null pointer deref in tcf_block_put
We need to check block for being null in both tcf_block_put and
tcf_block_put_ext.
Fixes: 343723dd51
("net: sched: fix clsact init error path")
Reported-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -379,6 +379,8 @@ void tcf_block_put(struct tcf_block *block)
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{
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struct tcf_block_ext_info ei = {0, };
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if (!block)
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return;
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tcf_block_put_ext(block, block->q, &ei);
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}
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