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

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

Fixes: 156d0e290e ("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

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Naveen N. Rao 2021-10-06 01:55:23 +05:30 • committed by Michael Ellerman

parent 8bbc9d8224

commit 5855c4c1f4

1 changed files with 17 additions and 10 deletions

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arch/powerpc/net/bpf_jit_comp64.c

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