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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
448 lines
13 KiB
C
448 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_STRING_H_
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#define _LINUX_STRING_H_
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#include <linux/compiler.h> /* for inline */
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#include <linux/types.h> /* for size_t */
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#include <linux/stddef.h> /* for NULL */
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#include <stdarg.h>
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#include <uapi/linux/string.h>
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extern char *strndup_user(const char __user *, long);
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extern void *memdup_user(const void __user *, size_t);
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extern void *memdup_user_nul(const void __user *, size_t);
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/*
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* Include machine specific inline routines
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*/
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#include <asm/string.h>
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#ifndef __HAVE_ARCH_STRCPY
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extern char * strcpy(char *,const char *);
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#endif
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#ifndef __HAVE_ARCH_STRNCPY
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extern char * strncpy(char *,const char *, __kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_STRLCPY
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size_t strlcpy(char *, const char *, size_t);
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#endif
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#ifndef __HAVE_ARCH_STRSCPY
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ssize_t __must_check strscpy(char *, const char *, size_t);
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#endif
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#ifndef __HAVE_ARCH_STRCAT
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extern char * strcat(char *, const char *);
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#endif
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#ifndef __HAVE_ARCH_STRNCAT
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extern char * strncat(char *, const char *, __kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_STRLCAT
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extern size_t strlcat(char *, const char *, __kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_STRCMP
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extern int strcmp(const char *,const char *);
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#endif
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#ifndef __HAVE_ARCH_STRNCMP
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extern int strncmp(const char *,const char *,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_STRCASECMP
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extern int strcasecmp(const char *s1, const char *s2);
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#endif
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#ifndef __HAVE_ARCH_STRNCASECMP
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extern int strncasecmp(const char *s1, const char *s2, size_t n);
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#endif
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#ifndef __HAVE_ARCH_STRCHR
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extern char * strchr(const char *,int);
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#endif
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#ifndef __HAVE_ARCH_STRCHRNUL
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extern char * strchrnul(const char *,int);
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#endif
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#ifndef __HAVE_ARCH_STRNCHR
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extern char * strnchr(const char *, size_t, int);
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#endif
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#ifndef __HAVE_ARCH_STRRCHR
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extern char * strrchr(const char *,int);
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#endif
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extern char * __must_check skip_spaces(const char *);
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extern char *strim(char *);
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static inline __must_check char *strstrip(char *str)
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{
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return strim(str);
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}
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#ifndef __HAVE_ARCH_STRSTR
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extern char * strstr(const char *, const char *);
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#endif
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#ifndef __HAVE_ARCH_STRNSTR
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extern char * strnstr(const char *, const char *, size_t);
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#endif
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#ifndef __HAVE_ARCH_STRLEN
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extern __kernel_size_t strlen(const char *);
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#endif
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#ifndef __HAVE_ARCH_STRNLEN
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extern __kernel_size_t strnlen(const char *,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_STRPBRK
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extern char * strpbrk(const char *,const char *);
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#endif
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#ifndef __HAVE_ARCH_STRSEP
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extern char * strsep(char **,const char *);
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#endif
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#ifndef __HAVE_ARCH_STRSPN
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extern __kernel_size_t strspn(const char *,const char *);
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#endif
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#ifndef __HAVE_ARCH_STRCSPN
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extern __kernel_size_t strcspn(const char *,const char *);
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#endif
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#ifndef __HAVE_ARCH_MEMSET
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extern void * memset(void *,int,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMSET16
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extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMSET32
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extern void *memset32(uint32_t *, uint32_t, __kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMSET64
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extern void *memset64(uint64_t *, uint64_t, __kernel_size_t);
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#endif
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static inline void *memset_l(unsigned long *p, unsigned long v,
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__kernel_size_t n)
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{
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if (BITS_PER_LONG == 32)
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return memset32((uint32_t *)p, v, n);
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else
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return memset64((uint64_t *)p, v, n);
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}
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static inline void *memset_p(void **p, void *v, __kernel_size_t n)
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{
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if (BITS_PER_LONG == 32)
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return memset32((uint32_t *)p, (uintptr_t)v, n);
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else
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return memset64((uint64_t *)p, (uintptr_t)v, n);
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}
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#ifndef __HAVE_ARCH_MEMCPY
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extern void * memcpy(void *,const void *,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMMOVE
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extern void * memmove(void *,const void *,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMSCAN
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extern void * memscan(void *,int,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMCMP
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extern int memcmp(const void *,const void *,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMCHR
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extern void * memchr(const void *,int,__kernel_size_t);
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#endif
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#ifndef __HAVE_ARCH_MEMCPY_MCSAFE
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static inline __must_check int memcpy_mcsafe(void *dst, const void *src,
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size_t cnt)
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{
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memcpy(dst, src, cnt);
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return 0;
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}
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#endif
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#ifndef __HAVE_ARCH_MEMCPY_FLUSHCACHE
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static inline void memcpy_flushcache(void *dst, const void *src, size_t cnt)
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{
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memcpy(dst, src, cnt);
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}
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#endif
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void *memchr_inv(const void *s, int c, size_t n);
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char *strreplace(char *s, char old, char new);
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extern void kfree_const(const void *x);
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extern char *kstrdup(const char *s, gfp_t gfp) __malloc;
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extern const char *kstrdup_const(const char *s, gfp_t gfp);
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extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
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extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
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extern char *kmemdup_nul(const char *s, size_t len, gfp_t gfp);
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extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
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extern void argv_free(char **argv);
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extern bool sysfs_streq(const char *s1, const char *s2);
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extern int kstrtobool(const char *s, bool *res);
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static inline int strtobool(const char *s, bool *res)
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{
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return kstrtobool(s, res);
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}
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int match_string(const char * const *array, size_t n, const char *string);
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int __sysfs_match_string(const char * const *array, size_t n, const char *s);
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/**
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* sysfs_match_string - matches given string in an array
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* @_a: array of strings
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* @_s: string to match with
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*
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* Helper for __sysfs_match_string(). Calculates the size of @a automatically.
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*/
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#define sysfs_match_string(_a, _s) __sysfs_match_string(_a, ARRAY_SIZE(_a), _s)
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#ifdef CONFIG_BINARY_PRINTF
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int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
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int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
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int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
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#endif
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extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
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const void *from, size_t available);
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/**
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* strstarts - does @str start with @prefix?
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* @str: string to examine
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* @prefix: prefix to look for.
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*/
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static inline bool strstarts(const char *str, const char *prefix)
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{
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return strncmp(str, prefix, strlen(prefix)) == 0;
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}
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size_t memweight(const void *ptr, size_t bytes);
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void memzero_explicit(void *s, size_t count);
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/**
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* kbasename - return the last part of a pathname.
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*
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* @path: path to extract the filename from.
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*/
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static inline const char *kbasename(const char *path)
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{
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const char *tail = strrchr(path, '/');
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return tail ? tail + 1 : path;
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}
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#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
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#define __RENAME(x) __asm__(#x)
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void fortify_panic(const char *name) __noreturn __cold;
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void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
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void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
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void __read_overflow3(void) __compiletime_error("detected read beyond size of object passed as 3rd parameter");
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void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
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#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
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__FORTIFY_INLINE char *strncpy(char *p, const char *q, __kernel_size_t size)
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{
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size_t p_size = __builtin_object_size(p, 0);
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if (__builtin_constant_p(size) && p_size < size)
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__write_overflow();
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if (p_size < size)
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fortify_panic(__func__);
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return __builtin_strncpy(p, q, size);
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}
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__FORTIFY_INLINE char *strcat(char *p, const char *q)
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{
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size_t p_size = __builtin_object_size(p, 0);
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if (p_size == (size_t)-1)
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return __builtin_strcat(p, q);
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if (strlcat(p, q, p_size) >= p_size)
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fortify_panic(__func__);
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return p;
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}
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__FORTIFY_INLINE __kernel_size_t strlen(const char *p)
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{
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__kernel_size_t ret;
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size_t p_size = __builtin_object_size(p, 0);
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if (p_size == (size_t)-1)
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return __builtin_strlen(p);
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ret = strnlen(p, p_size);
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if (p_size <= ret)
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fortify_panic(__func__);
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return ret;
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}
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extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
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__FORTIFY_INLINE __kernel_size_t strnlen(const char *p, __kernel_size_t maxlen)
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{
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size_t p_size = __builtin_object_size(p, 0);
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__kernel_size_t ret = __real_strnlen(p, maxlen < p_size ? maxlen : p_size);
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if (p_size <= ret && maxlen != ret)
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fortify_panic(__func__);
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return ret;
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}
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/* defined after fortified strlen to reuse it */
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extern size_t __real_strlcpy(char *, const char *, size_t) __RENAME(strlcpy);
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__FORTIFY_INLINE size_t strlcpy(char *p, const char *q, size_t size)
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{
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size_t ret;
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size_t p_size = __builtin_object_size(p, 0);
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size_t q_size = __builtin_object_size(q, 0);
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if (p_size == (size_t)-1 && q_size == (size_t)-1)
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return __real_strlcpy(p, q, size);
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ret = strlen(q);
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if (size) {
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size_t len = (ret >= size) ? size - 1 : ret;
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if (__builtin_constant_p(len) && len >= p_size)
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__write_overflow();
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if (len >= p_size)
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fortify_panic(__func__);
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__builtin_memcpy(p, q, len);
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p[len] = '\0';
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}
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return ret;
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}
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/* defined after fortified strlen and strnlen to reuse them */
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__FORTIFY_INLINE char *strncat(char *p, const char *q, __kernel_size_t count)
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{
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size_t p_len, copy_len;
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size_t p_size = __builtin_object_size(p, 0);
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size_t q_size = __builtin_object_size(q, 0);
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if (p_size == (size_t)-1 && q_size == (size_t)-1)
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return __builtin_strncat(p, q, count);
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p_len = strlen(p);
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copy_len = strnlen(q, count);
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if (p_size < p_len + copy_len + 1)
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fortify_panic(__func__);
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__builtin_memcpy(p + p_len, q, copy_len);
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p[p_len + copy_len] = '\0';
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return p;
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}
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__FORTIFY_INLINE void *memset(void *p, int c, __kernel_size_t size)
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{
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size_t p_size = __builtin_object_size(p, 0);
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if (__builtin_constant_p(size) && p_size < size)
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__write_overflow();
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if (p_size < size)
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fortify_panic(__func__);
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return __builtin_memset(p, c, size);
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}
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__FORTIFY_INLINE void *memcpy(void *p, const void *q, __kernel_size_t size)
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{
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size_t p_size = __builtin_object_size(p, 0);
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size_t q_size = __builtin_object_size(q, 0);
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if (__builtin_constant_p(size)) {
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if (p_size < size)
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__write_overflow();
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if (q_size < size)
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__read_overflow2();
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}
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if (p_size < size || q_size < size)
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fortify_panic(__func__);
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return __builtin_memcpy(p, q, size);
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}
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__FORTIFY_INLINE void *memmove(void *p, const void *q, __kernel_size_t size)
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{
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size_t p_size = __builtin_object_size(p, 0);
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size_t q_size = __builtin_object_size(q, 0);
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if (__builtin_constant_p(size)) {
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if (p_size < size)
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__write_overflow();
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if (q_size < size)
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__read_overflow2();
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}
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if (p_size < size || q_size < size)
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fortify_panic(__func__);
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return __builtin_memmove(p, q, size);
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}
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extern void *__real_memscan(void *, int, __kernel_size_t) __RENAME(memscan);
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__FORTIFY_INLINE void *memscan(void *p, int c, __kernel_size_t size)
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{
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size_t p_size = __builtin_object_size(p, 0);
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if (__builtin_constant_p(size) && p_size < size)
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__read_overflow();
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if (p_size < size)
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fortify_panic(__func__);
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return __real_memscan(p, c, size);
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}
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|
__FORTIFY_INLINE int memcmp(const void *p, const void *q, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (__builtin_constant_p(size)) {
|
|
if (p_size < size)
|
|
__read_overflow();
|
|
if (q_size < size)
|
|
__read_overflow2();
|
|
}
|
|
if (p_size < size || q_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_memcmp(p, q, size);
|
|
}
|
|
|
|
__FORTIFY_INLINE void *memchr(const void *p, int c, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__read_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_memchr(p, c, size);
|
|
}
|
|
|
|
void *__real_memchr_inv(const void *s, int c, size_t n) __RENAME(memchr_inv);
|
|
__FORTIFY_INLINE void *memchr_inv(const void *p, int c, size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__read_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __real_memchr_inv(p, c, size);
|
|
}
|
|
|
|
extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup);
|
|
__FORTIFY_INLINE void *kmemdup(const void *p, size_t size, gfp_t gfp)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__read_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __real_kmemdup(p, size, gfp);
|
|
}
|
|
|
|
/* defined after fortified strlen and memcpy to reuse them */
|
|
__FORTIFY_INLINE char *strcpy(char *p, const char *q)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (p_size == (size_t)-1 && q_size == (size_t)-1)
|
|
return __builtin_strcpy(p, q);
|
|
memcpy(p, q, strlen(q) + 1);
|
|
return p;
|
|
}
|
|
|
|
#endif
|
|
|
|
/**
|
|
* memcpy_and_pad - Copy one buffer to another with padding
|
|
* @dest: Where to copy to
|
|
* @dest_len: The destination buffer size
|
|
* @src: Where to copy from
|
|
* @count: The number of bytes to copy
|
|
* @pad: Character to use for padding if space is left in destination.
|
|
*/
|
|
static inline void memcpy_and_pad(void *dest, size_t dest_len,
|
|
const void *src, size_t count, int pad)
|
|
{
|
|
if (dest_len > count) {
|
|
memcpy(dest, src, count);
|
|
memset(dest + count, pad, dest_len - count);
|
|
} else
|
|
memcpy(dest, src, dest_len);
|
|
}
|
|
|
|
#endif /* _LINUX_STRING_H_ */
|