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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-08-06 14:26:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-05 09:18:40 +0200 |
| commit | 2502064731b133b87540758678b4485c0dbdc925 (patch) | |
| tree | 0a21be7d4334c42cbbed2803087094c84e2af136 /block | |
| parent | 2edb10cbf21fca9b220a2bdf0b87b7bbeaf1e1e9 (diff) | |
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>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions