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/string.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 arch/powerpc/boot/string.h (limited to 'arch/powerpc/boot/string.h') diff --git a/arch/powerpc/boot/string.h b/arch/powerpc/boot/string.h new file mode 100644 index 000000000..2b28d1853 --- /dev/null +++ b/arch/powerpc/boot/string.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _PPC_BOOT_STRING_H_ +#define _PPC_BOOT_STRING_H_ +#include + +extern char *strcpy(char *dest, const char *src); +extern char *strcat(char *dest, const char *src); +extern char *strchr(const char *s, int c); +extern char *strrchr(const char *s, int c); +extern int strcmp(const char *s1, const char *s2); +extern int strncmp(const char *s1, const char *s2, size_t n); +extern size_t strlen(const char *s); +extern size_t strnlen(const char *s, size_t count); + +extern void *memset(void *s, int c, size_t n); +extern void *memmove(void *dest, const void *src, unsigned long n); +extern void *memcpy(void *dest, const void *src, unsigned long n); +extern void *memchr(const void *s, int c, size_t n); +extern int memcmp(const void *s1, const void *s2, size_t n); + +#endif /* _PPC_BOOT_STRING_H_ */ -- cgit v1.3.1