s390/bpf,jit: address randomize and write protect jit code

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This is the s390 variant of 314beb9b "x86: bpf_jit_comp: secure bpf
jit against spraying attacks".
With this change the whole jit code and literal pool will be write
protected after creation. In addition the start address of the jit
code won't be always on a page boundary anymore.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2013-07-16 13:25:49 +02:00 • committed by Martin Schwidefsky

parent fee1b5488d

commit aa2d2c73c2

1 changed files with 46 additions and 5 deletions

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arch/s390/net/bpf_jit_comp.c

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