net: bpf_jit: fix an off-one bug in x86_64 cond jump target
authorMarkus Kötter <nepenthesdev@gmail.com>
Sat, 17 Dec 2011 11:39:08 +0000 (11:39 +0000)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 6 Jan 2012 22:17:26 +0000 (14:17 -0800)
commitb8b7320109c5fc492688d63fc3089fd0868a0aa1
treee93c692d67d9624013a778b147740e2448919a6b
parent904bc58192c45c132938a97629578a954f26478d
net: bpf_jit: fix an off-one bug in x86_64 cond jump target

[ Upstream commit a03ffcf873fe0f2565386ca8ef832144c42e67fa ]

x86 jump instruction size is 2 or 5 bytes (near/long jump), not 2 or 6
bytes.

In case a conditional jump is followed by a long jump, conditional jump
target is one byte past the start of target instruction.

Signed-off-by: Markus Kötter <nepenthesdev@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
arch/x86/net/bpf_jit_comp.c