Pu Lehui 52e0d8a8dd riscv, bpf: Emit fixed-length instructions for BPF_PSEUDO_FUNC ... [ Upstream commit b54b600361 ] For BPF_PSEUDO_FUNC instruction, verifier will refill imm with correct addresses of bpf_calls and then run last pass of JIT. Since the emit_imm of RV64 is variable-length, which will emit appropriate length instructions accorroding to the imm, it may broke ctx->offset, and lead to unpredictable problem, such as inaccurate jump. So let's fix it with fixed-length instructions. Fixes: 69c087ba62 ("bpf: Add bpf_for_each_map_elem() helper") Suggested-by: Björn Töpel <bjorn@rivosinc.com> Signed-off-by: Pu Lehui <pulehui@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Björn Töpel <bjorn@kernel.org> Acked-by: Björn Töpel <bjorn@kernel.org> Link: https://lore.kernel.org/bpf/20221206091410.1584784-1-pulehui@huaweicloud.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-12-31 13:14:16 +01:00
..
Makefile	riscv, bpf: Add RV32G eBPF JIT	2020-03-05 16:13:47 +01:00
bpf_jit.h	bpf, riscv: Add encodings for compressed instructions	2020-07-21 13:26:25 -07:00
bpf_jit_comp32.c	bpf: Introduce BPF nospec instruction for mitigating Spectre v4	2021-07-29 00:20:56 +02:00
bpf_jit_comp64.c	riscv, bpf: Emit fixed-length instructions for BPF_PSEUDO_FUNC	2022-12-31 13:14:16 +01:00
bpf_jit_core.c	riscv, bpf: Fix potential NULL dereference	2021-10-28 08:14:30 -07:00