Martin Schwidefsky bcd169a272 s390: fix br_r1_trampoline for machines without exrl ...

commit 26f843848bae973817b3587780ce6b7b0200d3e4 upstream.

For machines without the exrl instruction the BFP jit generates
code that uses an "br %r1" instruction located in the lowcore page.
Unfortunately there is a cut & paste error that puts an additional
"larl %r1,.+14" instruction in the code that clobbers the branch
target address in %r1. Remove the larl instruction.

Cc: <stable@vger.kernel.org> # v4.17+
Fixes: de5cb6eb51 ("s390: use expoline thunks in the BPF JIT")
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-09-05 09:26:40 +02:00

..

bpf_jit_comp.c

s390: fix br_r1_trampoline for machines without exrl

2018-09-05 09:26:40 +02:00

bpf_jit.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

bpf_jit.S

s390: use expoline thunks in the BPF JIT

2018-05-25 16:17:33 +02:00

Makefile

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