License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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>
2017-11-01 14:07:57 +00:00
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
2011-06-26 14:18:58 +00:00
|
|
|
/*
|
|
|
|
* security/tomoyo/audit.c
|
|
|
|
*
|
2011-07-14 05:46:51 +00:00
|
|
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* Copyright (C) 2005-2011 NTT DATA CORPORATION
|
2011-06-26 14:18:58 +00:00
|
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|
*/
|
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|
|
|
|
#include "common.h"
|
|
|
|
#include <linux/slab.h>
|
|
|
|
|
2011-07-08 04:24:54 +00:00
|
|
|
/**
|
|
|
|
* tomoyo_print_bprm - Print "struct linux_binprm" for auditing.
|
|
|
|
*
|
|
|
|
* @bprm: Pointer to "struct linux_binprm".
|
|
|
|
* @dump: Pointer to "struct tomoyo_page_dump".
|
|
|
|
*
|
|
|
|
* Returns the contents of @bprm on success, NULL otherwise.
|
|
|
|
*
|
|
|
|
* This function uses kzalloc(), so caller must kfree() if this function
|
|
|
|
* didn't return NULL.
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|
|
|
*/
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|
|
|
static char *tomoyo_print_bprm(struct linux_binprm *bprm,
|
|
|
|
struct tomoyo_page_dump *dump)
|
|
|
|
{
|
|
|
|
static const int tomoyo_buffer_len = 4096 * 2;
|
|
|
|
char *buffer = kzalloc(tomoyo_buffer_len, GFP_NOFS);
|
|
|
|
char *cp;
|
|
|
|
char *last_start;
|
|
|
|
int len;
|
|
|
|
unsigned long pos = bprm->p;
|
|
|
|
int offset = pos % PAGE_SIZE;
|
|
|
|
int argv_count = bprm->argc;
|
|
|
|
int envp_count = bprm->envc;
|
|
|
|
bool truncated = false;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-07-08 04:24:54 +00:00
|
|
|
if (!buffer)
|
|
|
|
return NULL;
|
|
|
|
len = snprintf(buffer, tomoyo_buffer_len - 1, "argv[]={ ");
|
|
|
|
cp = buffer + len;
|
|
|
|
if (!argv_count) {
|
|
|
|
memmove(cp, "} envp[]={ ", 11);
|
|
|
|
cp += 11;
|
|
|
|
}
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|
|
|
last_start = cp;
|
|
|
|
while (argv_count || envp_count) {
|
|
|
|
if (!tomoyo_dump_page(bprm, pos, dump))
|
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|
|
goto out;
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|
|
|
pos += PAGE_SIZE - offset;
|
|
|
|
/* Read. */
|
|
|
|
while (offset < PAGE_SIZE) {
|
|
|
|
const char *kaddr = dump->data;
|
|
|
|
const unsigned char c = kaddr[offset++];
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-07-08 04:24:54 +00:00
|
|
|
if (cp == last_start)
|
|
|
|
*cp++ = '"';
|
|
|
|
if (cp >= buffer + tomoyo_buffer_len - 32) {
|
|
|
|
/* Reserve some room for "..." string. */
|
|
|
|
truncated = true;
|
|
|
|
} else if (c == '\\') {
|
|
|
|
*cp++ = '\\';
|
|
|
|
*cp++ = '\\';
|
|
|
|
} else if (c > ' ' && c < 127) {
|
|
|
|
*cp++ = c;
|
|
|
|
} else if (!c) {
|
|
|
|
*cp++ = '"';
|
|
|
|
*cp++ = ' ';
|
|
|
|
last_start = cp;
|
|
|
|
} else {
|
|
|
|
*cp++ = '\\';
|
|
|
|
*cp++ = (c >> 6) + '0';
|
|
|
|
*cp++ = ((c >> 3) & 7) + '0';
|
|
|
|
*cp++ = (c & 7) + '0';
|
|
|
|
}
|
|
|
|
if (c)
|
|
|
|
continue;
|
|
|
|
if (argv_count) {
|
|
|
|
if (--argv_count == 0) {
|
|
|
|
if (truncated) {
|
|
|
|
cp = last_start;
|
|
|
|
memmove(cp, "... ", 4);
|
|
|
|
cp += 4;
|
|
|
|
}
|
|
|
|
memmove(cp, "} envp[]={ ", 11);
|
|
|
|
cp += 11;
|
|
|
|
last_start = cp;
|
|
|
|
truncated = false;
|
|
|
|
}
|
|
|
|
} else if (envp_count) {
|
|
|
|
if (--envp_count == 0) {
|
|
|
|
if (truncated) {
|
|
|
|
cp = last_start;
|
|
|
|
memmove(cp, "... ", 4);
|
|
|
|
cp += 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!argv_count && !envp_count)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
offset = 0;
|
|
|
|
}
|
|
|
|
*cp++ = '}';
|
|
|
|
*cp = '\0';
|
|
|
|
return buffer;
|
|
|
|
out:
|
|
|
|
snprintf(buffer, tomoyo_buffer_len - 1,
|
|
|
|
"argv[]={ ... } envp[]= { ... }");
|
|
|
|
return buffer;
|
|
|
|
}
|
|
|
|
|
2011-07-08 04:22:41 +00:00
|
|
|
/**
|
|
|
|
* tomoyo_filetype - Get string representation of file type.
|
|
|
|
*
|
|
|
|
* @mode: Mode value for stat().
|
|
|
|
*
|
|
|
|
* Returns file type string.
|
|
|
|
*/
|
2011-08-27 03:03:17 +00:00
|
|
|
static inline const char *tomoyo_filetype(const umode_t mode)
|
2011-07-08 04:22:41 +00:00
|
|
|
{
|
|
|
|
switch (mode & S_IFMT) {
|
|
|
|
case S_IFREG:
|
|
|
|
case 0:
|
|
|
|
return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FILE];
|
|
|
|
case S_IFDIR:
|
|
|
|
return tomoyo_condition_keyword[TOMOYO_TYPE_IS_DIRECTORY];
|
|
|
|
case S_IFLNK:
|
|
|
|
return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SYMLINK];
|
|
|
|
case S_IFIFO:
|
|
|
|
return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FIFO];
|
|
|
|
case S_IFSOCK:
|
|
|
|
return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SOCKET];
|
|
|
|
case S_IFBLK:
|
|
|
|
return tomoyo_condition_keyword[TOMOYO_TYPE_IS_BLOCK_DEV];
|
|
|
|
case S_IFCHR:
|
|
|
|
return tomoyo_condition_keyword[TOMOYO_TYPE_IS_CHAR_DEV];
|
|
|
|
}
|
|
|
|
return "unknown"; /* This should not happen. */
|
|
|
|
}
|
|
|
|
|
2011-06-26 14:18:58 +00:00
|
|
|
/**
|
|
|
|
* tomoyo_print_header - Get header line of audit log.
|
|
|
|
*
|
|
|
|
* @r: Pointer to "struct tomoyo_request_info".
|
|
|
|
*
|
|
|
|
* Returns string representation.
|
|
|
|
*
|
|
|
|
* This function uses kmalloc(), so caller must kfree() if this function
|
|
|
|
* didn't return NULL.
|
|
|
|
*/
|
|
|
|
static char *tomoyo_print_header(struct tomoyo_request_info *r)
|
|
|
|
{
|
|
|
|
struct tomoyo_time stamp;
|
|
|
|
const pid_t gpid = task_pid_nr(current);
|
2011-07-08 04:22:41 +00:00
|
|
|
struct tomoyo_obj_info *obj = r->obj;
|
2011-06-26 14:18:58 +00:00
|
|
|
static const int tomoyo_buffer_len = 4096;
|
|
|
|
char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
|
2011-07-08 04:21:37 +00:00
|
|
|
int pos;
|
2011-07-08 04:22:41 +00:00
|
|
|
u8 i;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-06-26 14:18:58 +00:00
|
|
|
if (!buffer)
|
|
|
|
return NULL;
|
2014-06-11 23:59:19 +00:00
|
|
|
|
2017-10-19 12:29:04 +00:00
|
|
|
tomoyo_convert_time(ktime_get_real_seconds(), &stamp);
|
2014-06-11 23:59:19 +00:00
|
|
|
|
2011-07-08 04:21:37 +00:00
|
|
|
pos = snprintf(buffer, tomoyo_buffer_len - 1,
|
2019-01-24 09:37:35 +00:00
|
|
|
"#%04u/%02u/%02u %02u:%02u:%02u# profile=%u mode=%s granted=%s (global-pid=%u) task={ pid=%u ppid=%u uid=%u gid=%u euid=%u egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
|
|
|
|
stamp.year, stamp.month, stamp.day, stamp.hour,
|
|
|
|
stamp.min, stamp.sec, r->profile, tomoyo_mode[r->mode],
|
|
|
|
tomoyo_yesno(r->granted), gpid, tomoyo_sys_getpid(),
|
|
|
|
tomoyo_sys_getppid(),
|
2012-02-08 00:34:10 +00:00
|
|
|
from_kuid(&init_user_ns, current_uid()),
|
|
|
|
from_kgid(&init_user_ns, current_gid()),
|
|
|
|
from_kuid(&init_user_ns, current_euid()),
|
|
|
|
from_kgid(&init_user_ns, current_egid()),
|
|
|
|
from_kuid(&init_user_ns, current_suid()),
|
|
|
|
from_kgid(&init_user_ns, current_sgid()),
|
|
|
|
from_kuid(&init_user_ns, current_fsuid()),
|
|
|
|
from_kgid(&init_user_ns, current_fsgid()));
|
2011-07-08 04:22:41 +00:00
|
|
|
if (!obj)
|
|
|
|
goto no_obj_info;
|
|
|
|
if (!obj->validate_done) {
|
|
|
|
tomoyo_get_attributes(obj);
|
|
|
|
obj->validate_done = true;
|
|
|
|
}
|
|
|
|
for (i = 0; i < TOMOYO_MAX_PATH_STAT; i++) {
|
|
|
|
struct tomoyo_mini_stat *stat;
|
|
|
|
unsigned int dev;
|
2011-08-27 03:03:17 +00:00
|
|
|
umode_t mode;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-07-08 04:22:41 +00:00
|
|
|
if (!obj->stat_valid[i])
|
|
|
|
continue;
|
|
|
|
stat = &obj->stat[i];
|
|
|
|
dev = stat->dev;
|
|
|
|
mode = stat->mode;
|
|
|
|
if (i & 1) {
|
|
|
|
pos += snprintf(buffer + pos,
|
|
|
|
tomoyo_buffer_len - 1 - pos,
|
2019-01-24 09:37:35 +00:00
|
|
|
" path%u.parent={ uid=%u gid=%u ino=%lu perm=0%o }",
|
|
|
|
(i >> 1) + 1,
|
2012-02-08 00:34:10 +00:00
|
|
|
from_kuid(&init_user_ns, stat->uid),
|
|
|
|
from_kgid(&init_user_ns, stat->gid),
|
|
|
|
(unsigned long)stat->ino,
|
|
|
|
stat->mode & S_IALLUGO);
|
2011-07-08 04:22:41 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
|
2019-01-24 09:37:35 +00:00
|
|
|
" path%u={ uid=%u gid=%u ino=%lu major=%u minor=%u perm=0%o type=%s",
|
|
|
|
(i >> 1) + 1,
|
2012-02-08 00:34:10 +00:00
|
|
|
from_kuid(&init_user_ns, stat->uid),
|
|
|
|
from_kgid(&init_user_ns, stat->gid),
|
|
|
|
(unsigned long)stat->ino,
|
|
|
|
MAJOR(dev), MINOR(dev),
|
2011-07-08 04:22:41 +00:00
|
|
|
mode & S_IALLUGO, tomoyo_filetype(mode));
|
|
|
|
if (S_ISCHR(mode) || S_ISBLK(mode)) {
|
|
|
|
dev = stat->rdev;
|
|
|
|
pos += snprintf(buffer + pos,
|
|
|
|
tomoyo_buffer_len - 1 - pos,
|
|
|
|
" dev_major=%u dev_minor=%u",
|
|
|
|
MAJOR(dev), MINOR(dev));
|
|
|
|
}
|
|
|
|
pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
|
|
|
|
" }");
|
|
|
|
}
|
|
|
|
no_obj_info:
|
2011-07-08 04:21:37 +00:00
|
|
|
if (pos < tomoyo_buffer_len - 1)
|
|
|
|
return buffer;
|
|
|
|
kfree(buffer);
|
|
|
|
return NULL;
|
2011-06-26 14:18:58 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_init_log - Allocate buffer for audit logs.
|
|
|
|
*
|
|
|
|
* @r: Pointer to "struct tomoyo_request_info".
|
|
|
|
* @len: Buffer size needed for @fmt and @args.
|
|
|
|
* @fmt: The printf()'s format string.
|
|
|
|
* @args: va_list structure for @fmt.
|
|
|
|
*
|
|
|
|
* Returns pointer to allocated memory.
|
|
|
|
*
|
|
|
|
* This function uses kzalloc(), so caller must kfree() if this function
|
|
|
|
* didn't return NULL.
|
|
|
|
*/
|
|
|
|
char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
|
|
|
|
va_list args)
|
|
|
|
{
|
|
|
|
char *buf = NULL;
|
2011-07-08 04:24:54 +00:00
|
|
|
char *bprm_info = NULL;
|
2011-06-26 14:18:58 +00:00
|
|
|
const char *header = NULL;
|
2011-07-08 04:23:44 +00:00
|
|
|
char *realpath = NULL;
|
|
|
|
const char *symlink = NULL;
|
2011-06-26 14:18:58 +00:00
|
|
|
int pos;
|
2011-06-30 08:32:30 +00:00
|
|
|
const char *domainname = r->domain->domainname->name;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-06-26 14:18:58 +00:00
|
|
|
header = tomoyo_print_header(r);
|
|
|
|
if (!header)
|
|
|
|
return NULL;
|
|
|
|
/* +10 is for '\n' etc. and '\0'. */
|
|
|
|
len += strlen(domainname) + strlen(header) + 10;
|
2011-07-08 04:23:44 +00:00
|
|
|
if (r->ee) {
|
|
|
|
struct file *file = r->ee->bprm->file;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-07-08 04:23:44 +00:00
|
|
|
realpath = tomoyo_realpath_from_path(&file->f_path);
|
2011-07-08 04:24:54 +00:00
|
|
|
bprm_info = tomoyo_print_bprm(r->ee->bprm, &r->ee->dump);
|
|
|
|
if (!realpath || !bprm_info)
|
2011-07-08 04:23:44 +00:00
|
|
|
goto out;
|
2011-07-08 04:24:54 +00:00
|
|
|
/* +80 is for " exec={ realpath=\"%s\" argc=%d envc=%d %s }" */
|
|
|
|
len += strlen(realpath) + 80 + strlen(bprm_info);
|
2011-07-08 04:23:44 +00:00
|
|
|
} else if (r->obj && r->obj->symlink_target) {
|
|
|
|
symlink = r->obj->symlink_target->name;
|
|
|
|
/* +18 is for " symlink.target=\"%s\"" */
|
|
|
|
len += 18 + strlen(symlink);
|
|
|
|
}
|
2011-06-26 14:18:58 +00:00
|
|
|
len = tomoyo_round2(len);
|
|
|
|
buf = kzalloc(len, GFP_NOFS);
|
|
|
|
if (!buf)
|
|
|
|
goto out;
|
|
|
|
len--;
|
|
|
|
pos = snprintf(buf, len, "%s", header);
|
2011-07-08 04:23:44 +00:00
|
|
|
if (realpath) {
|
2011-07-08 04:24:54 +00:00
|
|
|
struct linux_binprm *bprm = r->ee->bprm;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-07-08 04:23:44 +00:00
|
|
|
pos += snprintf(buf + pos, len - pos,
|
2011-07-08 04:24:54 +00:00
|
|
|
" exec={ realpath=\"%s\" argc=%d envc=%d %s }",
|
|
|
|
realpath, bprm->argc, bprm->envc, bprm_info);
|
2011-07-08 04:23:44 +00:00
|
|
|
} else if (symlink)
|
|
|
|
pos += snprintf(buf + pos, len - pos, " symlink.target=\"%s\"",
|
|
|
|
symlink);
|
2011-06-26 14:18:58 +00:00
|
|
|
pos += snprintf(buf + pos, len - pos, "\n%s\n", domainname);
|
|
|
|
vsnprintf(buf + pos, len - pos, fmt, args);
|
|
|
|
out:
|
2011-07-08 04:23:44 +00:00
|
|
|
kfree(realpath);
|
2011-07-08 04:24:54 +00:00
|
|
|
kfree(bprm_info);
|
2011-06-26 14:18:58 +00:00
|
|
|
kfree(header);
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Wait queue for /sys/kernel/security/tomoyo/audit. */
|
|
|
|
static DECLARE_WAIT_QUEUE_HEAD(tomoyo_log_wait);
|
|
|
|
|
|
|
|
/* Structure for audit log. */
|
|
|
|
struct tomoyo_log {
|
|
|
|
struct list_head list;
|
|
|
|
char *log;
|
|
|
|
int size;
|
|
|
|
};
|
|
|
|
|
|
|
|
/* The list for "struct tomoyo_log". */
|
|
|
|
static LIST_HEAD(tomoyo_log);
|
|
|
|
|
|
|
|
/* Lock for "struct list_head tomoyo_log". */
|
|
|
|
static DEFINE_SPINLOCK(tomoyo_log_lock);
|
|
|
|
|
2020-12-06 04:44:57 +00:00
|
|
|
/* Length of "struct list_head tomoyo_log". */
|
2011-06-26 14:18:58 +00:00
|
|
|
static unsigned int tomoyo_log_count;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_get_audit - Get audit mode.
|
|
|
|
*
|
2011-06-26 14:19:52 +00:00
|
|
|
* @ns: Pointer to "struct tomoyo_policy_namespace".
|
2011-06-26 14:18:58 +00:00
|
|
|
* @profile: Profile number.
|
|
|
|
* @index: Index number of functionality.
|
2021-06-10 07:49:00 +00:00
|
|
|
* @matched_acl: Pointer to "struct tomoyo_acl_info".
|
2011-06-26 14:18:58 +00:00
|
|
|
* @is_granted: True if granted log, false otherwise.
|
|
|
|
*
|
|
|
|
* Returns true if this request should be audited, false otherwise.
|
|
|
|
*/
|
2011-06-26 14:19:52 +00:00
|
|
|
static bool tomoyo_get_audit(const struct tomoyo_policy_namespace *ns,
|
|
|
|
const u8 profile, const u8 index,
|
2011-09-10 06:24:56 +00:00
|
|
|
const struct tomoyo_acl_info *matched_acl,
|
2011-06-26 14:18:58 +00:00
|
|
|
const bool is_granted)
|
|
|
|
{
|
|
|
|
u8 mode;
|
2011-06-26 14:21:19 +00:00
|
|
|
const u8 category = tomoyo_index2category[index] +
|
|
|
|
TOMOYO_MAX_MAC_INDEX;
|
2011-06-26 14:18:58 +00:00
|
|
|
struct tomoyo_profile *p;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-06-26 14:18:58 +00:00
|
|
|
if (!tomoyo_policy_loaded)
|
|
|
|
return false;
|
2011-06-26 14:19:52 +00:00
|
|
|
p = tomoyo_profile(ns, profile);
|
2011-06-26 14:18:58 +00:00
|
|
|
if (tomoyo_log_count >= p->pref[TOMOYO_PREF_MAX_AUDIT_LOG])
|
|
|
|
return false;
|
2011-09-10 06:24:56 +00:00
|
|
|
if (is_granted && matched_acl && matched_acl->cond &&
|
|
|
|
matched_acl->cond->grant_log != TOMOYO_GRANTLOG_AUTO)
|
|
|
|
return matched_acl->cond->grant_log == TOMOYO_GRANTLOG_YES;
|
2011-06-26 14:18:58 +00:00
|
|
|
mode = p->config[index];
|
|
|
|
if (mode == TOMOYO_CONFIG_USE_DEFAULT)
|
|
|
|
mode = p->config[category];
|
|
|
|
if (mode == TOMOYO_CONFIG_USE_DEFAULT)
|
|
|
|
mode = p->default_config;
|
|
|
|
if (is_granted)
|
|
|
|
return mode & TOMOYO_CONFIG_WANT_GRANT_LOG;
|
|
|
|
return mode & TOMOYO_CONFIG_WANT_REJECT_LOG;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_write_log2 - Write an audit log.
|
|
|
|
*
|
|
|
|
* @r: Pointer to "struct tomoyo_request_info".
|
|
|
|
* @len: Buffer size needed for @fmt and @args.
|
|
|
|
* @fmt: The printf()'s format string.
|
|
|
|
* @args: va_list structure for @fmt.
|
|
|
|
*
|
|
|
|
* Returns nothing.
|
|
|
|
*/
|
|
|
|
void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
|
|
|
|
va_list args)
|
|
|
|
{
|
|
|
|
char *buf;
|
|
|
|
struct tomoyo_log *entry;
|
|
|
|
bool quota_exceeded = false;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-09-10 06:24:56 +00:00
|
|
|
if (!tomoyo_get_audit(r->domain->ns, r->profile, r->type,
|
|
|
|
r->matched_acl, r->granted))
|
2011-06-26 14:18:58 +00:00
|
|
|
goto out;
|
|
|
|
buf = tomoyo_init_log(r, len, fmt, args);
|
|
|
|
if (!buf)
|
|
|
|
goto out;
|
|
|
|
entry = kzalloc(sizeof(*entry), GFP_NOFS);
|
|
|
|
if (!entry) {
|
|
|
|
kfree(buf);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
entry->log = buf;
|
|
|
|
len = tomoyo_round2(strlen(buf) + 1);
|
|
|
|
/*
|
|
|
|
* The entry->size is used for memory quota checks.
|
|
|
|
* Don't go beyond strlen(entry->log).
|
|
|
|
*/
|
|
|
|
entry->size = len + tomoyo_round2(sizeof(*entry));
|
|
|
|
spin_lock(&tomoyo_log_lock);
|
|
|
|
if (tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT] &&
|
|
|
|
tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] + entry->size >=
|
|
|
|
tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT]) {
|
|
|
|
quota_exceeded = true;
|
|
|
|
} else {
|
|
|
|
tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] += entry->size;
|
|
|
|
list_add_tail(&entry->list, &tomoyo_log);
|
|
|
|
tomoyo_log_count++;
|
|
|
|
}
|
|
|
|
spin_unlock(&tomoyo_log_lock);
|
|
|
|
if (quota_exceeded) {
|
|
|
|
kfree(buf);
|
|
|
|
kfree(entry);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
wake_up(&tomoyo_log_wait);
|
|
|
|
out:
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_write_log - Write an audit log.
|
|
|
|
*
|
|
|
|
* @r: Pointer to "struct tomoyo_request_info".
|
|
|
|
* @fmt: The printf()'s format string, followed by parameters.
|
|
|
|
*
|
|
|
|
* Returns nothing.
|
|
|
|
*/
|
|
|
|
void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
|
|
|
|
{
|
|
|
|
va_list args;
|
|
|
|
int len;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-06-26 14:18:58 +00:00
|
|
|
va_start(args, fmt);
|
|
|
|
len = vsnprintf((char *) &len, 1, fmt, args) + 1;
|
|
|
|
va_end(args);
|
|
|
|
va_start(args, fmt);
|
|
|
|
tomoyo_write_log2(r, len, fmt, args);
|
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_read_log - Read an audit log.
|
|
|
|
*
|
|
|
|
* @head: Pointer to "struct tomoyo_io_buffer".
|
|
|
|
*
|
|
|
|
* Returns nothing.
|
|
|
|
*/
|
|
|
|
void tomoyo_read_log(struct tomoyo_io_buffer *head)
|
|
|
|
{
|
|
|
|
struct tomoyo_log *ptr = NULL;
|
2019-01-24 09:37:35 +00:00
|
|
|
|
2011-06-26 14:18:58 +00:00
|
|
|
if (head->r.w_pos)
|
|
|
|
return;
|
|
|
|
kfree(head->read_buf);
|
|
|
|
head->read_buf = NULL;
|
|
|
|
spin_lock(&tomoyo_log_lock);
|
|
|
|
if (!list_empty(&tomoyo_log)) {
|
|
|
|
ptr = list_entry(tomoyo_log.next, typeof(*ptr), list);
|
|
|
|
list_del(&ptr->list);
|
|
|
|
tomoyo_log_count--;
|
|
|
|
tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] -= ptr->size;
|
|
|
|
}
|
|
|
|
spin_unlock(&tomoyo_log_lock);
|
|
|
|
if (ptr) {
|
|
|
|
head->read_buf = ptr->log;
|
|
|
|
head->r.w[head->r.w_pos++] = head->read_buf;
|
|
|
|
kfree(ptr);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_poll_log - Wait for an audit log.
|
|
|
|
*
|
|
|
|
* @file: Pointer to "struct file".
|
2012-03-14 09:27:49 +00:00
|
|
|
* @wait: Pointer to "poll_table". Maybe NULL.
|
2011-06-26 14:18:58 +00:00
|
|
|
*
|
2018-02-11 22:34:03 +00:00
|
|
|
* Returns EPOLLIN | EPOLLRDNORM when ready to read an audit log.
|
2011-06-26 14:18:58 +00:00
|
|
|
*/
|
2017-07-03 03:32:02 +00:00
|
|
|
__poll_t tomoyo_poll_log(struct file *file, poll_table *wait)
|
2011-06-26 14:18:58 +00:00
|
|
|
{
|
|
|
|
if (tomoyo_log_count)
|
2018-02-11 22:34:03 +00:00
|
|
|
return EPOLLIN | EPOLLRDNORM;
|
2011-06-26 14:18:58 +00:00
|
|
|
poll_wait(file, &tomoyo_log_wait, wait);
|
|
|
|
if (tomoyo_log_count)
|
2018-02-11 22:34:03 +00:00
|
|
|
return EPOLLIN | EPOLLRDNORM;
|
2011-06-26 14:18:58 +00:00
|
|
|
return 0;
|
|
|
|
}
|