On 2025/8/12 17:02, Radim Krčmář wrote:
emit_ld is wrong, because thread_info.cpu is 32-bit, not xlen-bit wide. The struct currently has a hole after cpu, so little endian accesses seemed fine.
Fixes: 2ddec2c80b44 ("riscv, bpf: inline bpf_get_smp_processor_id()") Cc: stable@vger.kernel.org Signed-off-by: Radim Krčmář rkrcmar@ventanamicro.com
arch/riscv/net/bpf_jit_comp64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c index 6e1554d89681..9883a55d61b5 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -1763,7 +1763,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx, */ if (insn->src_reg == 0 && insn->imm == BPF_FUNC_get_smp_processor_id) { /* Load current CPU number in R0 */
emit_ld(bpf_to_rv_reg(BPF_REG_0, ctx), offsetof(struct thread_info, cpu),
emit_lw(bpf_to_rv_reg(BPF_REG_0, ctx), offsetof(struct thread_info, cpu), RV_REG_TP, ctx); break;
Reviewed-by: Pu Lehui pulehui@huawei.com