From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- samples/pidfd/Makefile | 4 ++++ 1 file changed, 4 insertions(+) create mode 100644 samples/pidfd/Makefile (limited to 'samples/pidfd/Makefile') diff --git a/samples/pidfd/Makefile b/samples/pidfd/Makefile new file mode 100644 index 000000000..9754e2d81 --- /dev/null +++ b/samples/pidfd/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +usertprogs-always-y += pidfd-metadata + +userccflags += -I usr/include -- cgit v1.3.1