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authorFlorian Westphal <fw@strlen.de>2017-01-23 18:21:58 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2017-02-02 14:31:55 +0100
commit303223092081963513494b4377fa1ac9e362ed4b (patch)
treee312cf241ada3f96d5844613770ebbeeb152585c /tools/build/Documentation/Build.txt
parentc74454fadd5ea6fc866ffe2c417a0dba56b2bf1c (diff)
netfilter: guarantee 8 byte minalign for template addresses
The next change will merge skb->nfct pointer and skb->nfctinfo status bits into single skb->_nfct (unsigned long) area. For this to work nf_conn addresses must always be aligned at least on an 8 byte boundary since we will need the lower 3bits to store nfctinfo. Conntrack templates are allocated via kmalloc. kbuild test robot reported BUILD_BUG_ON failed: NFCT_INFOMASK >= ARCH_KMALLOC_MINALIGN on v1 of this patchset, so not all platforms meet this requirement. Do manual alignment if needed, the alignment offset is stored in the nf_conn entry protocol area. This works because templates are not handed off to L4 protocol trackers. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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