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authorFlorian Westphal <fw@strlen.de>2018-03-27 09:29:54 +0200
committerFlorian Westphal <fw@strlen.de>2018-03-27 11:36:58 +0200
commit483e5ea7167e1537accf4cb083b88a8beea8f834 (patch)
tree9828b350a3b59b8d201544a720359ce2663d4827 /tests/py/any/meta.t.payload
parent65a9d639ddac244ff3abc9dfde30482ff4a4c336 (diff)
src: avoid errouneous assert with map+concat
Phil reported following assert: add rule ip6 f o mark set ip6 saddr . ip6 daddr . tcp dport \ map { dead::beef . f00::. 22 : 1 } nft: netlink_linearize.c:655: netlink_gen_expr: Assertion `dreg < ctx->reg_low' failed. This happens because "mark set" will allocate one register (the dreg), but netlink_gen_concat_expr will populate a lot more register space if the concat expression strings a lot of expressions together. As the assert is useful pseudo-reserve the register space as per concat->len and undo after generating the expressions. Reported-by: Phil Sutter <phil@nwl.cc> Signed-off-by: Florian Westphal <fw@strlen.de>
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