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(parent: 3e06826) | patch
powerpc/bpf: use unsigned division instruction for 64-bit operations
authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Wed, 12 Jun 2019 18:51:40 +0000 (00:21 +0530)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 13 Jun 2019 21:07:00 +0000 (23:07 +0200)
commit758f2046ea040773ae8ea7f72dd3bbd8fa984501
tree5bc7151508fe910ab38e5ec09a74545abfc63f3atree | snapshot
parent3e0682695199bad51dd898fe064d1564637ff77acommit | diff
powerpc/bpf: use unsigned division instruction for 64-bit operations

BPF_ALU64 div/mod operations are currently using signed division, unlike
BPF_ALU32 operations. Fix the same. DIV64 and MOD64 overflow tests pass
with this fix.

Fixes: 156d0e290e969c ("powerpc/ebpf/jit: Implement JIT compiler for extended BPF")
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
arch/powerpc/include/asm/ppc-opcode.h diff | blob | history
arch/powerpc/net/bpf_jit.h diff | blob | history
arch/powerpc/net/bpf_jit_comp64.c diff | blob | history
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