1a5f19e4e243425d78c5a2e50cbb66912
parent 3af79302b400e05b45e377993a8870869500466b
author Eric Dumazet <eric.dumazet@gmail.com> 1332038448 +0000
committer David S. Miller <davem@davemloft.net> 1332193304 -0400

net: bpf_jit: fix BPF_S_LDX_B_MSH compilation

Matt Evans spotted that x86 bpf_jit was incorrectly handling negative
constant offsets in BPF_S_LDX_B_MSH instruction.

We need to abort JIT compilation like we do in common_load so that
filter uses the interpreter code and can call __load_pointer()

Reference: http://lists.openwall.net/netdev/2011/07/19/11

Thanks to Indan Zupancic to bring back this issue.

Reported-by: Matt Evans <matt@ozlabs.org>
Reported-by: Indan Zupancic <indan@nul.nu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ú