Rabin Vincent 55795ef546 net: filter: make JITs zero A for SKF_AD_ALU_XOR_X ... 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: 3480593131 ("net: filter: get rid of BPF_S_* enum") Signed-off-by: Rabin Vincent <rabin@rab.in> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-01-06 00:43:52 -05:00
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bpf_jit_asm.S
bpf_jit_comp.c	net: filter: make JITs zero A for SKF_AD_ALU_XOR_X	2016-01-06 00:43:52 -05:00
bpf_jit.h
Makefile