Messages in this thread | | | Date | Tue, 05 Jan 2016 17:37:54 +0100 | From | Daniel Borkmann <> | Subject | Re: [PATCH] net: filter: make JITs zero A for SKF_AD_ALU_XOR_X |
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On 01/05/2016 05:03 PM, Rabin Vincent wrote: > On Tue, Jan 05, 2016 at 08:00:45AM -0800, Eric Dumazet wrote: >> On Tue, 2016-01-05 at 16:23 +0100, Rabin Vincent wrote: >>> 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. >> >> Is x86_64 part of this 'All' subset ? ;) > > No, because it's an eBPF JIT.
Correct, filter conversion to eBPF clears it already.
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