Messages in this thread | | | Date | Wed, 06 Jan 2016 00:44:42 -0500 (EST) | Subject | Re: [PATCH] net: filter: make JITs zero A for SKF_AD_ALU_XOR_X | From | David Miller <> |
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From: Rabin Vincent <rabin@rab.in> Date: Tue, 5 Jan 2016 16:23:07 +0100
> The SKF_AD_ALU_XOR_X ancillary is not like the other ancillary data > instructions since it XORs A with X while all the others replace A with > some loaded value. All the BPF JITs fail to clear A if this is used as > the first instruction in a filter. This was found using american fuzzy > lop. > > Add a helper to determine if A needs to be cleared given the first > instruction in a filter, and use this in the JITs. Except for ARM, the > rest have only been compile-tested. > > Fixes: 3480593131e0 ("net: filter: get rid of BPF_S_* enum") > Signed-off-by: Rabin Vincent <rabin@rab.in>
Applied and queued up for -stable, thanks!
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