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/powerpc/boot/ofconsole.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 arch/powerpc/boot/ofconsole.c (limited to 'arch/powerpc/boot/ofconsole.c') diff --git a/arch/powerpc/boot/ofconsole.c b/arch/powerpc/boot/ofconsole.c new file mode 100644 index 000000000..8eb0f1c45 --- /dev/null +++ b/arch/powerpc/boot/ofconsole.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * OF console routines + * + * Copyright (C) Paul Mackerras 1997. + */ +#include +#include "types.h" +#include "elf.h" +#include "string.h" +#include "stdio.h" +#include "page.h" +#include "ops.h" + +#include "of.h" + +static unsigned int of_stdout_handle; + +static int of_console_open(void) +{ + void *devp; + + if (((devp = of_finddevice("/chosen")) != NULL) + && (of_getprop(devp, "stdout", &of_stdout_handle, + sizeof(of_stdout_handle)) + == sizeof(of_stdout_handle))) { + of_stdout_handle = be32_to_cpu(of_stdout_handle); + return 0; + } + + return -1; +} + +static void of_console_write(const char *buf, int len) +{ + of_call_prom("write", 3, 1, of_stdout_handle, buf, len); +} + +void of_console_init(void) +{ + console_ops.open = of_console_open; + console_ops.write = of_console_write; +} -- cgit v1.3.1