From 836b2fe544a5e9b5ce116622cb36fba33838c6fd Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 01:33:23 -0700 Subject: selftests/bpf: Check that JMP32 pointer vs zero jumps are not predicted Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which the verifier used to skip, contains an out of bounds map value access, hence w/o the previous patch the program is accepted. See previous patch for detailed description. Reported-by: Nicholas Carlini Suggested-by: Nicholas Carlini Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- 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