[RFC PATCH bpf-next v2 03/16] MIPS: eBPF: fix BPF_ALU|ARSH handling in JIT static analysis

[Tony Ambardar <tony.ambardar@xxxxxxxxx>]

Update reg_val_propagate_range() to add the missing case for BPF_ALU|ARSH,
otherwise zero-extension breaks for this opcode.

Resolves failures for test_verifier tests:
  963/p arsh32 reg zero extend check FAIL retval -1 != 0
  964/u arsh32 imm zero extend check FAIL retval -1 != 0
  964/p arsh32 imm zero extend check FAIL retval -1 != 0

Fixes: b6bd53f9c4e8 ("MIPS: Add missing file for eBPF JIT.")
Signed-off-by: Tony Ambardar <Tony.Ambardar@xxxxxxxxx>
---
 arch/mips/net/ebpf_jit.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/net/ebpf_jit.c b/arch/mips/net/ebpf_jit.c
index 82ea20399b70..b41ebcfb90c4 100644
--- a/arch/mips/net/ebpf_jit.c
+++ b/arch/mips/net/ebpf_jit.c
@@ -1590,6 +1590,7 @@ static int reg_val_propagate_range(struct jit_ctx *ctx, u64 initial_rvt,
 			case BPF_AND:
 			case BPF_LSH:
 			case BPF_RSH:
+			case BPF_ARSH:
 			case BPF_NEG:
 			case BPF_MOD:
 			case BPF_XOR:
-- 
2.25.1