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 --- include/asm-generic/current.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 include/asm-generic/current.h (limited to 'include/asm-generic/current.h') diff --git a/include/asm-generic/current.h b/include/asm-generic/current.h new file mode 100644 index 000000000..9c2aeecbd --- /dev/null +++ b/include/asm-generic/current.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_GENERIC_CURRENT_H +#define __ASM_GENERIC_CURRENT_H + +#ifndef __ASSEMBLY__ +#include + +#define get_current() (current_thread_info()->task) +#define current get_current() +#endif + +#endif /* __ASM_GENERIC_CURRENT_H */ -- cgit v1.3.1