commit 5855c4c1f415ca3ba1046e77c0b3d3dfc96c9025
author Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Wed Oct 06 01:55:23 2021 +0530
committer Michael Ellerman <mpe@ellerman.id.au> Thu Oct 07 19:52:26 2021 +1100
tree 3f5123b46a801ca6e58a4eff17c6520b90a3b756
parent 8bbc9d822421d9ac8ff9ed26a3713c9afc69d6c8

powerpc/bpf: Fix BPF_SUB when imm == 0x80000000

We aren't handling subtraction involving an immediate value of
0x80000000 properly. Fix the same.

Fixes: 156d0e290e969c ("powerpc/ebpf/jit: Implement JIT compiler for extended BPF")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Fold in fix from Naveen to use imm <= 32768]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/fc4b1276eb10761fd7ce0814c8dd089da2815251.1633464148.git.naveen.n.rao@linux.vnet.ibm.com