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https://gitee.com/bianbu-linux/linux-6.6
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f0a6b5831c
strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230614003604.1021205-1-azeemshaikh38@gmail.com
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#ifndef __USER_H__
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#define __USER_H__
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#include <generated/asm-offsets.h>
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/*
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* The usual definition - copied here because the kernel provides its own,
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* fancier, type-safe, definition. Using that one would require
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* copying too much infrastructure for my taste, so userspace files
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* get less checking than kernel files.
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*/
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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/* This is to get size_t and NULL */
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#ifndef __UM_HOST__
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#include <linux/types.h>
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#else
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#include <stddef.h>
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#include <sys/types.h>
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#endif
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extern void panic(const char *fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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/* Requires preincluding include/linux/kern_levels.h */
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#define UM_KERN_EMERG KERN_EMERG
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#define UM_KERN_ALERT KERN_ALERT
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#define UM_KERN_CRIT KERN_CRIT
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#define UM_KERN_ERR KERN_ERR
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#define UM_KERN_WARNING KERN_WARNING
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#define UM_KERN_NOTICE KERN_NOTICE
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#define UM_KERN_INFO KERN_INFO
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#define UM_KERN_DEBUG KERN_DEBUG
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#define UM_KERN_CONT KERN_CONT
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#ifdef UML_CONFIG_PRINTK
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#define printk(...) _printk(__VA_ARGS__)
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extern int _printk(const char *fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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#else
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static inline int printk(const char *fmt, ...)
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{
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return 0;
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}
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#endif
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extern int in_aton(char *str);
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extern size_t strlcpy(char *, const char *, size_t);
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extern size_t strlcat(char *, const char *, size_t);
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extern size_t strscpy(char *, const char *, size_t);
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/* Copied from linux/compiler-gcc.h since we can't include it directly */
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#define barrier() __asm__ __volatile__("": : :"memory")
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#endif
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