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 --- drivers/firmware/google/memconsole.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 drivers/firmware/google/memconsole.h (limited to 'drivers/firmware/google/memconsole.h') diff --git a/drivers/firmware/google/memconsole.h b/drivers/firmware/google/memconsole.h new file mode 100644 index 000000000..aaff2b72b --- /dev/null +++ b/drivers/firmware/google/memconsole.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * memconsole.h + * + * Internal headers of the memory based BIOS console. + * + * Copyright 2017 Google Inc. + */ + +#ifndef __FIRMWARE_GOOGLE_MEMCONSOLE_H +#define __FIRMWARE_GOOGLE_MEMCONSOLE_H + +#include + +/* + * memconsole_setup + * + * Initialize the memory console, passing the function to handle read accesses. + */ +void memconsole_setup(ssize_t (*read_func)(char *, loff_t, size_t)); + +/* + * memconsole_sysfs_init + * + * Update memory console length and create binary file + * for firmware object. + */ +int memconsole_sysfs_init(void); + +/* memconsole_exit + * + * Unmap the console buffer. + */ +void memconsole_exit(void); + +#endif /* __FIRMWARE_GOOGLE_MEMCONSOLE_H */ -- cgit v1.3.1