[PATCH bpf-next 0/2] bpf: Fix incorrect immediate spill

Immediate is incorrectly cast to u32 before being spilled, losing sign information. The range information is incorrect after load again. Fix immediate spill by remove the cast. The second patch add a test case for this.

Signed-off-by: Hao Sun sunhao.th@gmail.com --- Hao Sun (2): bpf: Fix check_stack_write_fixed_off() to correctly spill imm selftests/bpf: Add test for immediate spilled to stack

kernel/bpf/verifier.c | 2 +- tools/testing/selftests/bpf/verifier/bpf_st_mem.c | 32 +++++++++++++++++++++++ 2 files changed, 33 insertions(+), 1 deletion(-) --- base-commit: 399f6185a1c02f39bcadb8749bc2d9d48685816f change-id: 20231026-fix-check-stack-write-c40996694dfa

Best regards,