Skip to content

L
linux
Commit 6f817abc authored by Dave Kleikamp's avatar Dave Kleikamp
Browse files
Options

Merge with /home/shaggy/git/linus-clean/

parents f77165df bfd4bda0
Hide whitespace changes
Inline Side-by-side
Showing with 269 additions and 127 deletions
arch/i386/kernel/ptrace.c
View file @ 6f817abc
......@@ -683,24 +683,18 @@ void do_syscall_trace(struct pt_regs *regs, int entryexit)
/* do the secure computing check first */
secure_computing(regs->orig_eax);
if (unlikely(current->audit_context)) {
if (!entryexit)
audit_syscall_entry(current, regs->orig_eax,
regs->ebx, regs->ecx,
regs->edx, regs->esi);
else
audit_syscall_exit(current, regs->eax);
}
if (unlikely(current->audit_context) && entryexit)
audit_syscall_exit(current, AUDITSC_RESULT(regs->eax), regs->eax);
if (!(current->ptrace & PT_PTRACED))
return;
goto out;
/* Fake a debug trap */
if (test_thread_flag(TIF_SINGLESTEP))
send_sigtrap(current, regs, 0);
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
goto out;
/* the 0x80 provides a way for the tracing parent to distinguish
between a syscall stop and SIGTRAP delivery */
......@@ -715,4 +709,9 @@ void do_syscall_trace(struct pt_regs *regs, int entryexit)
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
out:
if (unlikely(current->audit_context) && !entryexit)
audit_syscall_entry(current, AUDIT_ARCH_I386, regs->orig_eax,
regs->ebx, regs->ecx, regs->edx, regs->esi);
}
arch/ia64/kernel/ptrace.c
View file @ 6f817abc
......@@ -1596,20 +1596,25 @@ syscall_trace_enter (long arg0, long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6, long arg7,
struct pt_regs regs)
{
long syscall;
if (test_thread_flag(TIF_SYSCALL_TRACE)
&& (current->ptrace & PT_PTRACED))
syscall_trace();
if (unlikely(current->audit_context)) {
if (IS_IA32_PROCESS(&regs))
long syscall;
int arch;
if (IS_IA32_PROCESS(&regs)) {
syscall = regs.r1;
else
arch = AUDIT_ARCH_I386;
} else {
syscall = regs.r15;
arch = AUDIT_ARCH_IA64;
}
audit_syscall_entry(current, syscall, arg0, arg1, arg2, arg3);
audit_syscall_entry(current, arch, syscall, arg0, arg1, arg2, arg3);
}
if (test_thread_flag(TIF_SYSCALL_TRACE)
&& (current->ptrace & PT_PTRACED))
syscall_trace();
}
/* "asmlinkage" so the input arguments are preserved... */
......@@ -1620,7 +1625,7 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3,
struct pt_regs regs)
{
if (unlikely(current->audit_context))
audit_syscall_exit(current, regs.r8);
audit_syscall_exit(current, AUDITSC_RESULT(regs.r10), regs.r8);
if (test_thread_flag(TIF_SYSCALL_TRACE)
&& (current->ptrace & PT_PTRACED))
......
arch/mips/kernel/ptrace.c
View file @ 6f817abc
......@@ -301,25 +301,38 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
return ret;
}
static inline int audit_arch(void)
{
#ifdef CONFIG_CPU_LITTLE_ENDIAN
#ifdef CONFIG_MIPS64
if (!(current->thread.mflags & MF_32BIT_REGS))
return AUDIT_ARCH_MIPSEL64;
#endif /* MIPS64 */
return AUDIT_ARCH_MIPSEL;
#else /* big endian... */
#ifdef CONFIG_MIPS64
if (!(current->thread.mflags & MF_32BIT_REGS))
return AUDIT_ARCH_MIPS64;
#endif /* MIPS64 */
return AUDIT_ARCH_MIPS;
#endif /* endian */
}
/*
* Notification of system call entry/exit
* - triggered by current->work.syscall_trace
*/
asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit)
{
if (unlikely(current->audit_context)) {
if (!entryexit)
audit_syscall_entry(current, regs->regs[2],
regs->regs[4], regs->regs[5],
regs->regs[6], regs->regs[7]);
else
audit_syscall_exit(current, regs->regs[2]);
}
if (unlikely(current->audit_context) && entryexit)
audit_syscall_exit(current, AUDITSC_RESULT(regs->regs[2]), regs->regs[2]);
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
goto out;
if (!(current->ptrace & PT_PTRACED))
return;
goto out;
/* The 0x80 provides a way for the tracing parent to distinguish
between a syscall stop and SIGTRAP delivery */
......@@ -335,4 +348,9 @@ asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit)
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
out:
if (unlikely(current->audit_context) && !entryexit)
audit_syscall_entry(current, audit_arch(), regs->regs[2],
regs->regs[4], regs->regs[5],
regs->regs[6], regs->regs[7]);
}
arch/ppc64/kernel/ptrace.c
View file @ 6f817abc
......@@ -305,14 +305,17 @@ static void do_syscall_trace(void)
void do_syscall_trace_enter(struct pt_regs *regs)
{
if (test_thread_flag(TIF_SYSCALL_TRACE)
&& (current->ptrace & PT_PTRACED))
do_syscall_trace();
if (unlikely(current->audit_context))
audit_syscall_entry(current, regs->gpr[0],
audit_syscall_entry(current,
test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,
regs->gpr[0],
regs->gpr[3], regs->gpr[4],
regs->gpr[5], regs->gpr[6]);
if (test_thread_flag(TIF_SYSCALL_TRACE)
&& (current->ptrace & PT_PTRACED))
do_syscall_trace();
}
void do_syscall_trace_leave(struct pt_regs *regs)
......@@ -320,7 +323,9 @@ void do_syscall_trace_leave(struct pt_regs *regs)
secure_computing(regs->gpr[0]);
if (unlikely(current->audit_context))
audit_syscall_exit(current, regs->result);
audit_syscall_exit(current,
(regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
regs->result);
if ((test_thread_flag(TIF_SYSCALL_TRACE)
|| test_thread_flag(TIF_SINGLESTEP))
......
arch/s390/kernel/ptrace.c
View file @ 6f817abc
......@@ -712,18 +712,13 @@ sys_ptrace(long request, long pid, long addr, long data)
asmlinkage void
syscall_trace(struct pt_regs *regs, int entryexit)
{
if (unlikely(current->audit_context)) {
if (!entryexit)
audit_syscall_entry(current, regs->gprs[2],
regs->orig_gpr2, regs->gprs[3],
regs->gprs[4], regs->gprs[5]);
else
audit_syscall_exit(current, regs->gprs[2]);
}
if (unlikely(current->audit_context) && entryexit)
audit_syscall_exit(current, AUDITSC_RESULT(regs->gprs[2]), regs->gprs[2]);
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
goto out;
if (!(current->ptrace & PT_PTRACED))
return;
goto out;
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
? 0x80 : 0));
......@@ -736,4 +731,10 @@ syscall_trace(struct pt_regs *regs, int entryexit)
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
out:
if (unlikely(current->audit_context) && !entryexit)
audit_syscall_entry(current,
test_thread_flag(TIF_31BIT)?AUDIT_ARCH_S390:AUDIT_ARCH_S390X,
regs->gprs[2], regs->orig_gpr2, regs->gprs[3],
regs->gprs[4], regs->gprs[5]);
}
arch/um/kernel/ptrace.c
View file @ 6f817abc
......@@ -337,15 +337,18 @@ void syscall_trace(union uml_pt_regs *regs, int entryexit)
if (unlikely(current->audit_context)) {
if (!entryexit)
audit_syscall_entry(current,
UPT_SYSCALL_NR(&regs->regs),
UPT_SYSCALL_ARG1(&regs->regs),
UPT_SYSCALL_ARG2(&regs->regs),
UPT_SYSCALL_ARG3(&regs->regs),
UPT_SYSCALL_ARG4(&regs->regs));
else
audit_syscall_exit(current,
UPT_SYSCALL_RET(&regs->regs));
audit_syscall_entry(current,
HOST_AUDIT_ARCH,
UPT_SYSCALL_NR(regs),
UPT_SYSCALL_ARG1(regs),
UPT_SYSCALL_ARG2(regs),
UPT_SYSCALL_ARG3(regs),
UPT_SYSCALL_ARG4(regs));
else {
int res = UPT_SYSCALL_RET(regs);
audit_syscall_exit(current, AUDITSC_RESULT(res),
res);
}
}
/* Fake a debug trap */
......
arch/x86_64/kernel/ptrace.c
View file @ 6f817abc
......@@ -635,20 +635,29 @@ asmlinkage void syscall_trace_enter(struct pt_regs *regs)
/* do the secure computing check first */
secure_computing(regs->orig_rax);
if (unlikely(current->audit_context))
audit_syscall_entry(current, regs->orig_rax,
regs->rdi, regs->rsi,
regs->rdx, regs->r10);
if (test_thread_flag(TIF_SYSCALL_TRACE)
&& (current->ptrace & PT_PTRACED))
syscall_trace(regs);
if (unlikely(current->audit_context)) {
if (test_thread_flag(TIF_IA32)) {
audit_syscall_entry(current, AUDIT_ARCH_I386,
regs->orig_rax,
regs->rbx, regs->rcx,
regs->rdx, regs->rsi);
} else {
audit_syscall_entry(current, AUDIT_ARCH_X86_64,
regs->orig_rax,
regs->rdi, regs->rsi,
regs->rdx, regs->r10);
}
}
}
asmlinkage void syscall_trace_leave(struct pt_regs *regs)
{
if (unlikely(current->audit_context))
audit_syscall_exit(current, regs->rax);
audit_syscall_exit(current, AUDITSC_RESULT(regs->rax), regs->rax);
if ((test_thread_flag(TIF_SYSCALL_TRACE)
|| test_thread_flag(TIF_SINGLESTEP))
......
fs/namei.c
View file @ 6f817abc
......@@ -686,11 +686,11 @@ static int do_lookup(struct nameidata *nd, struct qstr *name,
/*
* Name resolution.
* This is the basic name resolution function, turning a pathname into
* the final dentry. We expect 'base' to be positive and a directory.
*
* This is the basic name resolution function, turning a pathname
* into the final dentry.
*
* We expect 'base' to be positive and a directory.
* Returns 0 and nd will have valid dentry and mnt on success.
* Returns error and drops reference to input namei data on failure.
*/
static fastcall int __link_path_walk(const char * name, struct nameidata *nd)
{
......@@ -929,8 +929,10 @@ int fastcall path_walk(const char * name, struct nameidata *nd)
return link_path_walk(name, nd);
}
/* SMP-safe */
/* returns 1 if everything is done */
/*
* SMP-safe: Returns 1 and nd will have valid dentry and mnt, if
* everything is done. Returns 0 and drops input nd, if lookup failed;
*/
static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
{
if (path_walk(name, nd))
......@@ -994,9 +996,10 @@ void set_fs_altroot(void)
}
}
/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
int fastcall path_lookup(const char *name, unsigned int flags, struct nameidata *nd)
{
int retval;
int retval = 0;
nd->last_type = LAST_ROOT; /* if there are only slashes... */
nd->flags = flags;
......@@ -1009,7 +1012,7 @@ int fastcall path_lookup(const char *name, unsigned int flags, struct nameidata
nd->dentry = dget(current->fs->altroot);
read_unlock(&current->fs->lock);
if (__emul_lookup_dentry(name,nd))
return 0;
goto out; /* found in altroot */
read_lock(&current->fs->lock);
}
nd->mnt = mntget(current->fs->rootmnt);
......@@ -1021,6 +1024,7 @@ int fastcall path_lookup(const char *name, unsigned int flags, struct nameidata
read_unlock(&current->fs->lock);
current->total_link_count = 0;
retval = link_path_walk(name, nd);
out:
if (unlikely(current->audit_context
&& nd && nd->dentry && nd->dentry->d_inode))
audit_inode(name, nd->dentry->d_inode);
......
fs/proc/base.c
View file @ 6f817abc
......@@ -820,7 +820,7 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
goto out_free_page;
}
length = audit_set_loginuid(task->audit_context, loginuid);
length = audit_set_loginuid(task, loginuid);
if (likely(length == 0))
length = count;
......
include/asm-um/ptrace-i386.h
View file @ 6f817abc
......@@ -6,6 +6,8 @@
#ifndef __UM_PTRACE_I386_H
#define __UM_PTRACE_I386_H
#define HOST_AUDIT_ARCH AUDIT_ARCH_I386
#include "sysdep/ptrace.h"
#include "asm/ptrace-generic.h"
......
include/asm-um/ptrace-x86_64.h
View file @ 6f817abc
......@@ -14,6 +14,8 @@
#include "asm/ptrace-generic.h"
#undef signal_fault
#define HOST_AUDIT_ARCH AUDIT_ARCH_X86_64
void signal_fault(struct pt_regs_subarch *regs, void *frame, char *where);
#define FS_BASE (21 * sizeof(unsigned long))
......
include/asm-um/thread_info.h
View file @ 6f817abc
......@@ -72,12 +72,14 @@ static inline struct thread_info *current_thread_info(void)
*/
#define TIF_RESTART_BLOCK 4
#define TIF_MEMDIE 5
#define TIF_SYSCALL_AUDIT 6
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_RESTART_BLOCK (1 << TIF_RESTART_BLOCK)
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#endif
......
include/linux/audit.h
View file @ 6f817abc
/* audit.h -- Auditing support -*- linux-c -*-
/* audit.h -- Auditing support
*
* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
* All Rights Reserved.
......@@ -24,6 +24,9 @@
#ifndef _LINUX_AUDIT_H_
#define _LINUX_AUDIT_H_
#include <linux/sched.h>
#include <linux/elf.h>
/* Request and reply types */
#define AUDIT_GET 1000 /* Get status */
#define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
......@@ -67,6 +70,7 @@
#define AUDIT_FSGID 8
#define AUDIT_LOGINUID 9
#define AUDIT_PERS 10
#define AUDIT_ARCH 11
/* These are ONLY useful when checking
* at syscall exit time (AUDIT_AT_EXIT). */
......@@ -96,6 +100,38 @@
#define AUDIT_FAIL_PRINTK 1
#define AUDIT_FAIL_PANIC 2
/* distinguish syscall tables */
#define __AUDIT_ARCH_64BIT 0x80000000
#define __AUDIT_ARCH_LE 0x40000000
#define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_ARMEB (EM_ARM)
#define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_FRV (EM_FRV)
#define AUDIT_ARCH_H8300 (EM_H8_300)
#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_M32R (EM_M32R)
#define AUDIT_ARCH_M68K (EM_68K)
#define AUDIT_ARCH_MIPS (EM_MIPS)
#define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_PARISC (EM_PARISC)
#define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_PPC (EM_PPC)
#define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_S390 (EM_S390)
#define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_SH (EM_SH)
#define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_SPARC (EM_SPARC)
#define AUDIT_ARCH_SPARC64 (EM_SPARC64|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_V850 (EM_V850|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#ifndef __KERNEL__
struct audit_message {
struct nlmsghdr nlh;
......@@ -129,32 +165,36 @@ struct audit_buffer;
struct audit_context;
struct inode;
#define AUDITSC_INVALID 0
#define AUDITSC_SUCCESS 1
#define AUDITSC_FAILURE 2
#define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
/* Public API */
extern int audit_alloc(struct task_struct *task);
extern void audit_free(struct task_struct *task);
extern void audit_syscall_entry(struct task_struct *task,
extern void audit_syscall_entry(struct task_struct *task, int arch,
int major, unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3);
extern void audit_syscall_exit(struct task_struct *task, int return_code);
extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code);
extern void audit_getname(const char *name);
extern void audit_putname(const char *name);
extern void audit_inode(const char *name, const struct inode *inode);
/* Private API (for audit.c only) */
extern int audit_receive_filter(int type, int pid, int uid, int seq,
void *data);
void *data, uid_t loginuid);
extern void audit_get_stamp(struct audit_context *ctx,
struct timespec *t, int *serial);
extern int audit_set_loginuid(struct audit_context *ctx, uid_t loginuid);
struct timespec *t, unsigned int *serial);
extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
extern uid_t audit_get_loginuid(struct audit_context *ctx);
extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
#else
#define audit_alloc(t) ({ 0; })
#define audit_free(t) do { ; } while (0)
#define audit_syscall_entry(t,a,b,c,d,e) do { ; } while (0)
#define audit_syscall_exit(t,r) do { ; } while (0)
#define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0)
#define audit_syscall_exit(t,f,r) do { ; } while (0)
#define audit_getname(n) do { ; } while (0)
#define audit_putname(n) do { ; } while (0)
#define audit_inode(n,i) do { ; } while (0)
......@@ -174,11 +214,15 @@ extern void audit_log_format(struct audit_buffer *ab,
const char *fmt, ...)
__attribute__((format(printf,2,3)));
extern void audit_log_end(struct audit_buffer *ab);
extern void audit_log_hex(struct audit_buffer *ab,
const unsigned char *buf,
size_t len);
extern void audit_log_untrustedstring(struct audit_buffer *ab,
const char *string);
extern void audit_log_d_path(struct audit_buffer *ab,
const char *prefix,
struct dentry *dentry,
struct vfsmount *vfsmnt);
/* Private API (for auditsc.c only) */
extern void audit_send_reply(int pid, int seq, int type,
int done, int multi,
......@@ -190,6 +234,8 @@ extern void audit_log_lost(const char *message);
#define audit_log_vformat(b,f,a) do { ; } while (0)
#define audit_log_format(b,f,...) do { ; } while (0)
#define audit_log_end(b) do { ; } while (0)
#define audit_log_hex(a,b,l) do { ; } while (0)
#define audit_log_untrustedstring(a,s) do { ; } while (0)
#define audit_log_d_path(b,p,d,v) do { ; } while (0)
#endif
#endif
......
include/linux/netlink.h
View file @ 6f817abc
......@@ -110,6 +110,7 @@ struct netlink_skb_parms
__u32 dst_pid;
__u32 dst_groups;
kernel_cap_t eff_cap;
__u32 loginuid; /* Login (audit) uid */
};
#define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb))
......
init/Kconfig
View file @ 6f817abc
......@@ -173,7 +173,7 @@ config AUDIT
config AUDITSYSCALL
bool "Enable system-call auditing support"
depends on AUDIT && (X86 || PPC64 || ARCH_S390 || IA64)
depends on AUDIT && (X86 || PPC64 || ARCH_S390 || IA64 || UML)
default y if SECURITY_SELINUX
help
Enable low-overhead system-call auditing infrastructure that
......
kernel/audit.c
View file @ 6f817abc
/* audit.c -- Auditing support -*- linux-c -*-
/* audit.c -- Auditing support
* Gateway between the kernel (e.g., selinux) and the user-space audit daemon.
* System-call specific features have moved to auditsc.c
*
......@@ -38,7 +38,7 @@
* 6) Support low-overhead kernel-based filtering to minimize the
* information that must be passed to user-space.
*
* Example user-space utilities: http://people.redhat.com/faith/audit/
* Example user-space utilities: http://people.redhat.com/sgrubb/audit/
*/
#include <linux/init.h>
......@@ -142,7 +142,6 @@ struct audit_buffer {
int total;
int type;
int pid;
int count; /* Times requeued */
};
void audit_set_type(struct audit_buffer *ab, int type)
......@@ -239,36 +238,36 @@ void audit_log_lost(const char *message)
}
static int audit_set_rate_limit(int limit)
static int audit_set_rate_limit(int limit, uid_t loginuid)
{
int old = audit_rate_limit;
audit_rate_limit = limit;
audit_log(current->audit_context, "audit_rate_limit=%d old=%d",
audit_rate_limit, old);
audit_log(NULL, "audit_rate_limit=%d old=%d by auid %u",
audit_rate_limit, old, loginuid);
return old;
}
static int audit_set_backlog_limit(int limit)
static int audit_set_backlog_limit(int limit, uid_t loginuid)
{
int old = audit_backlog_limit;
audit_backlog_limit = limit;
audit_log(current->audit_context, "audit_backlog_limit=%d old=%d",
audit_backlog_limit, old);
audit_log(NULL, "audit_backlog_limit=%d old=%d by auid %u",
audit_backlog_limit, old, loginuid);
return old;
}
static int audit_set_enabled(int state)
static int audit_set_enabled(int state, uid_t loginuid)
{
int old = audit_enabled;
if (state != 0 && state != 1)
return -EINVAL;
audit_enabled = state;
audit_log(current->audit_context, "audit_enabled=%d old=%d",
audit_enabled, old);
audit_log(NULL, "audit_enabled=%d old=%d by auid %u",
audit_enabled, old, loginuid);
return old;
}
static int audit_set_failure(int state)
static int audit_set_failure(int state, uid_t loginuid)
{
int old = audit_failure;
if (state != AUDIT_FAIL_SILENT
......@@ -276,8 +275,8 @@ static int audit_set_failure(int state)
&& state != AUDIT_FAIL_PANIC)
return -EINVAL;
audit_failure = state;
audit_log(current->audit_context, "audit_failure=%d old=%d",
audit_failure, old);
audit_log(NULL, "audit_failure=%d old=%d by auid %u",
audit_failure, old, loginuid);
return old;
}
......@@ -344,6 +343,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
int err;
struct audit_buffer *ab;
u16 msg_type = nlh->nlmsg_type;
uid_t loginuid; /* loginuid of sender */
err = audit_netlink_ok(NETLINK_CB(skb).eff_cap, msg_type);
if (err)
......@@ -351,6 +351,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
pid = NETLINK_CREDS(skb)->pid;
uid = NETLINK_CREDS(skb)->uid;
loginuid = NETLINK_CB(skb).loginuid;
seq = nlh->nlmsg_seq;
data = NLMSG_DATA(nlh);
......@@ -371,34 +372,36 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
return -EINVAL;
status_get = (struct audit_status *)data;
if (status_get->mask & AUDIT_STATUS_ENABLED) {
err = audit_set_enabled(status_get->enabled);
err = audit_set_enabled(status_get->enabled, loginuid);
if (err < 0) return err;
}
if (status_get->mask & AUDIT_STATUS_FAILURE) {
err = audit_set_failure(status_get->failure);
err = audit_set_failure(status_get->failure, loginuid);
if (err < 0) return err;
}
if (status_get->mask & AUDIT_STATUS_PID) {
int old = audit_pid;
audit_pid = status_get->pid;
audit_log(current->audit_context,
"audit_pid=%d old=%d", audit_pid, old);
audit_log(NULL, "audit_pid=%d old=%d by auid %u",
audit_pid, old, loginuid);
}
if (status_get->mask & AUDIT_STATUS_RATE_LIMIT)
audit_set_rate_limit(status_get->rate_limit);
audit_set_rate_limit(status_get->rate_limit, loginuid);
if (status_get->mask & AUDIT_STATUS_BACKLOG_LIMIT)
audit_set_backlog_limit(status_get->backlog_limit);
audit_set_backlog_limit(status_get->backlog_limit,
loginuid);
break;
case AUDIT_USER:
ab = audit_log_start(NULL);
if (!ab)
break; /* audit_panic has been called */
audit_log_format(ab,
"user pid=%d uid=%d length=%d msg='%.1024s'",
"user pid=%d uid=%d length=%d loginuid=%u"
" msg='%.1024s'",
pid, uid,
(int)(nlh->nlmsg_len
- ((char *)data - (char *)nlh)),
(char *)data);
loginuid, (char *)data);
ab->type = AUDIT_USER;
ab->pid = pid;
audit_log_end(ab);
......@@ -411,7 +414,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
case AUDIT_LIST:
#ifdef CONFIG_AUDITSYSCALL
err = audit_receive_filter(nlh->nlmsg_type, NETLINK_CB(skb).pid,
uid, seq, data);
uid, seq, data, loginuid);
#else
err = -EOPNOTSUPP;
#endif
......@@ -480,7 +483,7 @@ static void audit_log_move(struct audit_buffer *ab)
if (ab->len == 0)
return;
skb = skb_peek(&ab->sklist);
skb = skb_peek_tail(&ab->sklist);
if (!skb || skb_tailroom(skb) <= ab->len + extra) {
skb = alloc_skb(2 * ab->len + extra, GFP_ATOMIC);
if (!skb) {
......@@ -519,9 +522,9 @@ static inline int audit_log_drain(struct audit_buffer *ab)
retval = netlink_unicast(audit_sock, skb, audit_pid,
MSG_DONTWAIT);
}
if (retval == -EAGAIN && ab->count < 5) {
++ab->count;
skb_queue_tail(&ab->sklist, skb);
if (retval == -EAGAIN &&
(atomic_read(&audit_backlog)) < audit_backlog_limit) {
skb_queue_head(&ab->sklist, skb);
audit_log_end_irq(ab);
return 1;
}
......@@ -537,8 +540,8 @@ static inline int audit_log_drain(struct audit_buffer *ab)
if (!audit_pid) { /* No daemon */
int offset = ab->nlh ? NLMSG_SPACE(0) : 0;
int len = skb->len - offset;
printk(KERN_ERR "%*.*s\n",
len, len, skb->data + offset);
skb->data[offset + len] = '\0';
printk(KERN_ERR "%s\n", skb->data + offset);
}
kfree_skb(skb);
ab->nlh = NULL;
......@@ -617,7 +620,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx)
struct audit_buffer *ab = NULL;
unsigned long flags;
struct timespec t;
int serial = 0;
unsigned int serial;
if (!audit_initialized)
return NULL;
......@@ -659,15 +662,16 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx)
ab->total = 0;
ab->type = AUDIT_KERNEL;
ab->pid = 0;
ab->count = 0;
#ifdef CONFIG_AUDITSYSCALL
if (ab->ctx)
audit_get_stamp(ab->ctx, &t, &serial);
else
#endif
{
t = CURRENT_TIME;
serial = 0;
}
audit_log_format(ab, "audit(%lu.%03lu:%u): ",
t.tv_sec, t.tv_nsec/1000000, serial);
return ab;
......@@ -717,6 +721,29 @@ void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
va_end(args);
}
void audit_log_hex(struct audit_buffer *ab, const unsigned char *buf, size_t len)
{
int i;
for (i=0; i<len; i++)
audit_log_format(ab, "%02x", buf[i]);
}
void audit_log_untrustedstring(struct audit_buffer *ab, const char *string)
{
const unsigned char *p = string;
while (*p) {
if (*p == '"' || *p == ' ' || *p < 0x20 || *p > 0x7f) {
audit_log_hex(ab, string, strlen(string));
return;
}
p++;
}
audit_log_format(ab, "\"%s\"", string);
}
/* This is a helper-function to print the d_path without using a static
* buffer or allocating another buffer in addition to the one in
* audit_buffer. */
......
kernel/auditsc.c
View file @ 6f817abc
/* auditsc.c -- System-call auditing support -*- linux-c -*-
/* auditsc.c -- System-call auditing support
* Handles all system-call specific auditing features.
*
* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
......@@ -123,7 +123,7 @@ struct audit_context {
int major; /* syscall number */
unsigned long argv[4]; /* syscall arguments */
int return_valid; /* return code is valid */
int return_code;/* syscall return code */
long return_code;/* syscall return code */
int auditable; /* 1 if record should be written */
int name_count;
struct audit_names names[AUDIT_NAMES];
......@@ -135,6 +135,7 @@ struct audit_context {
uid_t uid, euid, suid, fsuid;
gid_t gid, egid, sgid, fsgid;
unsigned long personality;
int arch;
#if AUDIT_DEBUG
int put_count;
......@@ -250,7 +251,8 @@ static int audit_copy_rule(struct audit_rule *d, struct audit_rule *s)
return 0;
}
int audit_receive_filter(int type, int pid, int uid, int seq, void *data)
int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
uid_t loginuid)
{
u32 flags;
struct audit_entry *entry;
......@@ -285,6 +287,7 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data)
err = audit_add_rule(entry, &audit_entlist);
if (!err && (flags & AUDIT_AT_EXIT))
err = audit_add_rule(entry, &audit_extlist);
audit_log(NULL, "auid %u added an audit rule\n", loginuid);
break;
case AUDIT_DEL:
flags =((struct audit_rule *)data)->flags;
......@@ -294,6 +297,7 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data)
err = audit_del_rule(data, &audit_entlist);
if (!err && (flags & AUDIT_AT_EXIT))
err = audit_del_rule(data, &audit_extlist);
audit_log(NULL, "auid %u removed an audit rule\n", loginuid);
break;
default:
return -EINVAL;
......@@ -348,6 +352,10 @@ static int audit_filter_rules(struct task_struct *tsk,
case AUDIT_PERS:
result = (tsk->personality == value);
break;
case AUDIT_ARCH:
if (ctx)
result = (ctx->arch == value);
break;
case AUDIT_EXIT:
if (ctx && ctx->return_valid)
......@@ -355,7 +363,7 @@ static int audit_filter_rules(struct task_struct *tsk,
break;
case AUDIT_SUCCESS:
if (ctx && ctx->return_valid)
result = (ctx->return_code >= 0);
result = (ctx->return_valid == AUDITSC_SUCCESS);
break;
case AUDIT_DEVMAJOR:
if (ctx) {
......@@ -648,8 +656,11 @@ static void audit_log_exit(struct audit_context *context)
audit_log_format(ab, "syscall=%d", context->major);
if (context->personality != PER_LINUX)
audit_log_format(ab, " per=%lx", context->personality);
audit_log_format(ab, " arch=%x", context->arch);
if (context->return_valid)
audit_log_format(ab, " exit=%d", context->return_code);
audit_log_format(ab, " success=%s exit=%ld",
(context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
context->return_code);
audit_log_format(ab,
" a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
" pid=%d loginuid=%d uid=%d gid=%d"
......@@ -696,9 +707,10 @@ static void audit_log_exit(struct audit_context *context)
if (!ab)
continue; /* audit_panic has been called */
audit_log_format(ab, "item=%d", i);
if (context->names[i].name)
audit_log_format(ab, " name=%s",
context->names[i].name);
if (context->names[i].name) {
audit_log_format(ab, " name=");
audit_log_untrustedstring(ab, context->names[i].name);
}
if (context->names[i].ino != (unsigned long)-1)
audit_log_format(ab, " inode=%lu dev=%02x:%02x mode=%#o"
" uid=%d gid=%d rdev=%02x:%02x",
......@@ -772,7 +784,7 @@ static inline unsigned int audit_serial(void)
* then the record will be written at syscall exit time (otherwise, it
* will only be written if another part of the kernel requests that it
* be written). */
void audit_syscall_entry(struct task_struct *tsk, int major,
void audit_syscall_entry(struct task_struct *tsk, int arch, int major,
unsigned long a1, unsigned long a2,
unsigned long a3, unsigned long a4)
{
......@@ -826,6 +838,7 @@ void audit_syscall_entry(struct task_struct *tsk, int major,
if (!audit_enabled)
return;
context->arch = arch;
context->major = major;
context->argv[0] = a1;
context->argv[1] = a2;
......@@ -849,13 +862,13 @@ void audit_syscall_entry(struct task_struct *tsk, int major,
* filtering, or because some other part of the kernel write an audit
* message), then write out the syscall information. In call cases,
* free the names stored from getname(). */
void audit_syscall_exit(struct task_struct *tsk, int return_code)
void audit_syscall_exit(struct task_struct *tsk, int valid, long return_code)
{
struct audit_context *context;
get_task_struct(tsk);
task_lock(tsk);
context = audit_get_context(tsk, 1, return_code);
context = audit_get_context(tsk, valid, return_code);
task_unlock(tsk);
/* Not having a context here is ok, since the parent may have
......@@ -868,6 +881,7 @@ void audit_syscall_exit(struct task_struct *tsk, int return_code)
context->in_syscall = 0;
context->auditable = 0;
if (context->previous) {
struct audit_context *new_context = context->previous;
context->previous = NULL;
......@@ -981,7 +995,7 @@ void audit_inode(const char *name, const struct inode *inode)
}
void audit_get_stamp(struct audit_context *ctx,
struct timespec *t, int *serial)
struct timespec *t, unsigned int *serial)
{
if (ctx) {
t->tv_sec = ctx->ctime.tv_sec;
......@@ -996,20 +1010,21 @@ void audit_get_stamp(struct audit_context *ctx,
extern int audit_set_type(struct audit_buffer *ab, int type);
int audit_set_loginuid(struct audit_context *ctx, uid_t loginuid)
int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
{
if (ctx) {
if (task->audit_context) {
struct audit_buffer *ab;
ab = audit_log_start(NULL);
if (ab) {
audit_log_format(ab, "login pid=%d uid=%u "
"old loginuid=%u new loginuid=%u",
ctx->pid, ctx->uid, ctx->loginuid, loginuid);
task->pid, task->uid,
task->audit_context->loginuid, loginuid);
audit_set_type(ab, AUDIT_LOGIN);
audit_log_end(ab);
}
ctx->loginuid = loginuid;
task->audit_context->loginuid = loginuid;
}
return 0;
}
......
net/netlink/af_netlink.c
View file @ 6f817abc
......@@ -49,6 +49,8 @@
#include <linux/bitops.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <linux/audit.h>
#include <net/sock.h>
#include <net/scm.h>
......@@ -904,6 +906,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
NETLINK_CB(skb).groups = nlk->groups;
NETLINK_CB(skb).dst_pid = dst_pid;
NETLINK_CB(skb).dst_groups = dst_groups;
NETLINK_CB(skb).loginuid = audit_get_loginuid(current->audit_context);
memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
/* What can I do? Netlink is asynchronous, so that
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7