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 --- arch/arm/vdso/note.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 arch/arm/vdso/note.c (limited to 'arch/arm/vdso/note.c') diff --git a/arch/arm/vdso/note.c b/arch/arm/vdso/note.c new file mode 100644 index 000000000..eff5bf9ef --- /dev/null +++ b/arch/arm/vdso/note.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2012-2018 ARM Limited + * + * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text. + * Here we can supply some information useful to userland. + */ + +#include +#include +#include +#include + +ELFNOTE32("Linux", 0, LINUX_VERSION_CODE); +BUILD_SALT; -- cgit v1.3.1