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Merge git://git.infradead.org/users/eparis/audit

Browse Source 
Pull audit updates from Eric Paris:
 "So this change across a whole bunch of arches really solves one basic
  problem.  We want to audit when seccomp is killing a process.  seccomp
  hooks in before the audit syscall entry code.  audit_syscall_entry
  took as an argument the arch of the given syscall.  Since the arch is
  part of what makes a syscall number meaningful it's an important part
  of the record, but it isn't available when seccomp shoots the
  syscall...

  For most arch's we have a better way to get the arch (syscall_get_arch)
  So the solution was two fold: Implement syscall_get_arch() everywhere
  there is audit which didn't have it.  Use syscall_get_arch() in the
  seccomp audit code.  Having syscall_get_arch() everywhere meant it was
  a useless flag on the stack and we could get rid of it for the typical
  syscall entry.

  The other changes inside the audit system aren't grand, fixed some
  records that had invalid spaces.  Better locking around the task comm
  field.  Removing some dead functions and structs.  Make some things
  static.  Really minor stuff"

* git://git.infradead.org/users/eparis/audit: (31 commits)
  audit: rename audit_log_remove_rule to disambiguate for trees
  audit: cull redundancy in audit_rule_change
  audit: WARN if audit_rule_change called illegally
  audit: put rule existence check in canonical order
  next: openrisc: Fix build
  audit: get comm using lock to avoid race in string printing
  audit: remove open_arg() function that is never used
  audit: correct AUDIT_GET_FEATURE return message type
  audit: set nlmsg_len for multicast messages.
  audit: use union for audit_field values since they are mutually exclusive
  audit: invalid op= values for rules
  audit: use atomic_t to simplify audit_serial()
  kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0]
  audit: reduce scope of audit_log_fcaps
  audit: reduce scope of audit_net_id
  audit: arm64: Remove the audit arch argument to audit_syscall_entry
  arm64: audit: Add audit hook in syscall_trace_enter/exit()
  audit: x86: drop arch from __audit_syscall_entry() interface
  sparc: implement is_32bit_task
  sparc: properly conditionalize use of TIF_32BIT
  ...
This commit is contained in:
Linus Torvalds 2014-10-19 16:25:56 -07:00
commit ab074ade9c
43 changed files with 204 additions and 180 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/alpha/include/asm/syscall.h Normal file
View File

@ -0,0 +1,11 @@
#ifndef _ASM_ALPHA_SYSCALL_H
#define _ASM_ALPHA_SYSCALL_H
#include <uapi/linux/audit.h>
static inline int syscall_get_arch(void)
{
return AUDIT_ARCH_ALPHA;
}
#endif /* _ASM_ALPHA_SYSCALL_H */

2
arch/alpha/kernel/ptrace.c
View File

@ -321,7 +321,7 @@ asmlinkage unsigned long syscall_trace_enter(void)
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(current_pt_regs()))
ret = -1UL;
audit_syscall_entry(AUDIT_ARCH_ALPHA, regs->r0, regs->r16, regs->r17, regs->r18, regs->r19);
audit_syscall_entry(regs->r0, regs->r16, regs->r17, regs->r18, regs->r19);
return ret ?: current_pt_regs()->r0;
}

4
arch/arm/kernel/ptrace.c
View File

@ -949,8 +949,8 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs, int scno)
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_enter(regs, scno);
audit_syscall_entry(AUDIT_ARCH_ARM, scno, regs->ARM_r0, regs->ARM_r1,
regs->ARM_r2, regs->ARM_r3);
audit_syscall_entry(scno, regs->ARM_r0, regs->ARM_r1, regs->ARM_r2,
regs->ARM_r3);
return scno;
}

4
arch/arm64/kernel/ptrace.c
View File

@ -1120,8 +1120,8 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs)
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_enter(regs, regs->syscallno);
audit_syscall_entry(syscall_get_arch(), regs->syscallno,
regs->orig_x0, regs->regs[1], regs->regs[2], regs->regs[3]);
audit_syscall_entry(regs->syscallno, regs->orig_x0, regs->regs[1],
regs->regs[2], regs->regs[3]);
return regs->syscallno;
}

6
arch/ia64/include/asm/syscall.h
View File

@ -13,6 +13,7 @@
#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H 1
#include <uapi/linux/audit.h>
#include <linux/sched.h>
#include <linux/err.h>
@ -79,4 +80,9 @@ static inline void syscall_set_arguments(struct task_struct *task,
ia64_syscall_get_set_arguments(task, regs, i, n, args, 1);
}
static inline int syscall_get_arch(void)
{
return AUDIT_ARCH_IA64;
}
#endif /* _ASM_SYSCALL_H */

2
arch/ia64/kernel/ptrace.c
View File

@ -1219,7 +1219,7 @@ syscall_trace_enter (long arg0, long arg1, long arg2, long arg3,
ia64_sync_krbs();
audit_syscall_entry(AUDIT_ARCH_IA64, regs.r15, arg0, arg1, arg2, arg3);
audit_syscall_entry(regs.r15, arg0, arg1, arg2, arg3);
return 0;
}

5
arch/microblaze/include/asm/syscall.h
View File

@ -1,6 +1,7 @@
#ifndef __ASM_MICROBLAZE_SYSCALL_H
#define __ASM_MICROBLAZE_SYSCALL_H
#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
@ -99,4 +100,8 @@ static inline void syscall_set_arguments(struct task_struct *task,
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
static inline int syscall_get_arch(void)
{
return AUDIT_ARCH_MICROBLAZE;
}
#endif /* __ASM_MICROBLAZE_SYSCALL_H */

3
arch/microblaze/kernel/ptrace.c
View File

@ -147,8 +147,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
*/
ret = -1L;
audit_syscall_entry(EM_MICROBLAZE, regs->r12, regs->r5, regs->r6,
regs->r7, regs->r8);
audit_syscall_entry(regs->r12, regs->r5, regs->r6, regs->r7, regs->r8);
return ret ?: regs->r12;
}

2
arch/mips/include/asm/syscall.h
View File

@ -129,7 +129,7 @@ extern const unsigned long sysn32_call_table[];
static inline int syscall_get_arch(void)
{
int arch = EM_MIPS;
int arch = AUDIT_ARCH_MIPS;
#ifdef CONFIG_64BIT
if (!test_thread_flag(TIF_32BIT_REGS)) {
arch |= __AUDIT_ARCH_64BIT;

4
arch/mips/kernel/ptrace.c
View File

@ -780,9 +780,7 @@ asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->regs[2]);
audit_syscall_entry(syscall_get_arch(),
syscall,
regs->regs[4], regs->regs[5],
audit_syscall_entry(syscall, regs->regs[4], regs->regs[5],
regs->regs[6], regs->regs[7]);
return syscall;
}

5
arch/openrisc/include/asm/syscall.h
View File

@ -19,6 +19,7 @@
#ifndef __ASM_OPENRISC_SYSCALL_H__
#define __ASM_OPENRISC_SYSCALL_H__
#include <uapi/linux/audit.h>
#include <linux/err.h>
#include <linux/sched.h>
@ -71,4 +72,8 @@ syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
memcpy(&regs->gpr[3 + i], args, n * sizeof(args[0]));
}
static inline int syscall_get_arch(void)
{
return AUDIT_ARCH_OPENRISC;
}
#endif

3
arch/openrisc/include/uapi/asm/elf.h
View File

@ -55,9 +55,8 @@ typedef elf_greg_t elf_gregset_t[ELF_NGREG];
/* A placeholder; OR32 does not have fp support yes, so no fp regs for now. */
typedef unsigned long elf_fpregset_t;
/* This should be moved to include/linux/elf.h */
/* EM_OPENRISC is defined in linux/elf-em.h */
#define EM_OR32 0x8472
#define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */
/*
* These are used to set parameters in the core dumps.

3
arch/openrisc/kernel/ptrace.c
View File

@ -187,8 +187,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
*/
ret = -1L;
audit_syscall_entry(AUDIT_ARCH_OPENRISC, regs->gpr[11],
regs->gpr[3], regs->gpr[4],
audit_syscall_entry(regs->gpr[11], regs->gpr[3], regs->gpr[4],
regs->gpr[5], regs->gpr[6]);
return ret ? : regs->gpr[11];

11
arch/parisc/include/asm/syscall.h
View File

@ -3,6 +3,8 @@
#ifndef _ASM_PARISC_SYSCALL_H_
#define _ASM_PARISC_SYSCALL_H_
#include <uapi/linux/audit.h>
#include <linux/compat.h>
#include <linux/err.h>
#include <asm/ptrace.h>
@ -37,4 +39,13 @@ static inline void syscall_get_arguments(struct task_struct *tsk,
}
}
static inline int syscall_get_arch(void)
{
int arch = AUDIT_ARCH_PARISC;
#ifdef CONFIG_64BIT
if (!is_compat_task())
arch = AUDIT_ARCH_PARISC64;
#endif
return arch;
}
#endif /*_ASM_PARISC_SYSCALL_H_*/

9
arch/parisc/kernel/ptrace.c
View File

@ -280,14 +280,11 @@ long do_syscall_trace_enter(struct pt_regs *regs)
#ifdef CONFIG_64BIT
if (!is_compat_task())
audit_syscall_entry(AUDIT_ARCH_PARISC64,
regs->gr[20],
regs->gr[26], regs->gr[25],
regs->gr[24], regs->gr[23]);
audit_syscall_entry(regs->gr[20], regs->gr[26], regs->gr[25],
regs->gr[24], regs->gr[23]);
else
#endif
audit_syscall_entry(AUDIT_ARCH_PARISC,
regs->gr[20] & 0xffffffff,
audit_syscall_entry(regs->gr[20] & 0xffffffff,
regs->gr[26] & 0xffffffff,
regs->gr[25] & 0xffffffff,
regs->gr[24] & 0xffffffff,

6
arch/powerpc/include/asm/syscall.h
View File

@ -13,7 +13,9 @@
#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H 1
#include <uapi/linux/audit.h>
#include <linux/sched.h>
#include <linux/thread_info.h>
/* ftrace syscalls requires exporting the sys_call_table */
#ifdef CONFIG_FTRACE_SYSCALLS
@ -86,4 +88,8 @@ static inline void syscall_set_arguments(struct task_struct *task,
memcpy(&regs->gpr[3 + i], args, n * sizeof(args[0]));
}
static inline int syscall_get_arch(void)
{
return is_32bit_task() ? AUDIT_ARCH_PPC : AUDIT_ARCH_PPC64;
}
#endif /* _ASM_SYSCALL_H */

7
arch/powerpc/kernel/ptrace.c
View File

@ -1788,14 +1788,11 @@ long do_syscall_trace_enter(struct pt_regs *regs)
#ifdef CONFIG_PPC64
if (!is_32bit_task())
audit_syscall_entry(AUDIT_ARCH_PPC64,
regs->gpr[0],
regs->gpr[3], regs->gpr[4],
audit_syscall_entry(regs->gpr[0], regs->gpr[3], regs->gpr[4],
regs->gpr[5], regs->gpr[6]);
else
#endif
audit_syscall_entry(AUDIT_ARCH_PPC,
regs->gpr[0],
audit_syscall_entry(regs->gpr[0],
regs->gpr[3] & 0xffffffff,
regs->gpr[4] & 0xffffffff,
regs->gpr[5] & 0xffffffff,

4
arch/s390/kernel/ptrace.c
View File

@ -834,9 +834,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->gprs[2]);
audit_syscall_entry(is_compat_task() ?
AUDIT_ARCH_S390 : AUDIT_ARCH_S390X,
regs->gprs[2], regs->orig_gpr2,
audit_syscall_entry(regs->gprs[2], regs->orig_gpr2,
regs->gprs[3], regs->gprs[4],
regs->gprs[5]);
out:

10
arch/sh/include/asm/syscall_32.h
View File

@ -1,6 +1,7 @@
#ifndef __ASM_SH_SYSCALL_32_H
#define __ASM_SH_SYSCALL_32_H
#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/err.h>
@ -93,4 +94,13 @@ static inline void syscall_set_arguments(struct task_struct *task,
}
}
static inline int syscall_get_arch(void)
{
int arch = AUDIT_ARCH_SH;
#ifdef CONFIG_CPU_LITTLE_ENDIAN
arch |= __AUDIT_ARCH_LE;
#endif
return arch;
}
#endif /* __ASM_SH_SYSCALL_32_H */

14
arch/sh/include/asm/syscall_64.h
View File

@ -1,6 +1,7 @@
#ifndef __ASM_SH_SYSCALL_64_H
#define __ASM_SH_SYSCALL_64_H
#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
@ -61,4 +62,17 @@ static inline void syscall_set_arguments(struct task_struct *task,
memcpy(&regs->regs[2 + i], args, n * sizeof(args[0]));
}
static inline int syscall_get_arch(void)
{
int arch = AUDIT_ARCH_SH;
#ifdef CONFIG_64BIT
arch |= __AUDIT_ARCH_64BIT;
#endif
#ifdef CONFIG_CPU_LITTLE_ENDIAN
arch |= __AUDIT_ARCH_LE;
#endif
return arch;
}
#endif /* __ASM_SH_SYSCALL_64_H */

14
arch/sh/kernel/ptrace_32.c
View File

@ -484,17 +484,6 @@ long arch_ptrace(struct task_struct *child, long request,
return ret;
}
static inline int audit_arch(void)
{
int arch = EM_SH;
#ifdef CONFIG_CPU_LITTLE_ENDIAN
arch |= __AUDIT_ARCH_LE;
#endif
return arch;
}
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret = 0;
@ -513,8 +502,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->regs[0]);
audit_syscall_entry(audit_arch(), regs->regs[3],
regs->regs[4], regs->regs[5],
audit_syscall_entry(regs->regs[3], regs->regs[4], regs->regs[5],
regs->regs[6], regs->regs[7]);
return ret ?: regs->regs[0];

17
arch/sh/kernel/ptrace_64.c
View File

@ -504,20 +504,6 @@ asmlinkage int sh64_ptrace(long request, long pid,
return sys_ptrace(request, pid, addr, data);
}
static inline int audit_arch(void)
{
int arch = EM_SH;
#ifdef CONFIG_64BIT
arch |= __AUDIT_ARCH_64BIT;
#endif
#ifdef CONFIG_CPU_LITTLE_ENDIAN
arch |= __AUDIT_ARCH_LE;
#endif
return arch;
}
asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs)
{
long long ret = 0;
@ -536,8 +522,7 @@ asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->regs[9]);
audit_syscall_entry(audit_arch(), regs->regs[1],
regs->regs[2], regs->regs[3],
audit_syscall_entry(regs->regs[1], regs->regs[2], regs->regs[3],
regs->regs[4], regs->regs[5]);
return ret ?: regs->regs[9];

7
arch/sparc/include/asm/syscall.h
View File

@ -1,9 +1,11 @@
#ifndef __ASM_SPARC_SYSCALL_H
#define __ASM_SPARC_SYSCALL_H
#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
#include <asm/thread_info.h>
/*
* The syscall table always contains 32 bit pointers since we know that the
@ -124,4 +126,9 @@ static inline void syscall_set_arguments(struct task_struct *task,
regs->u_regs[UREG_I0 + i + j] = args[j];
}
static inline int syscall_get_arch(void)
{
return is_32bit_task() ? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64;
}
#endif /* __ASM_SPARC_SYSCALL_H */

2
arch/sparc/include/asm/thread_info_32.h
View File

@ -130,6 +130,8 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
_TIF_SIGPENDING)
#define is_32bit_task() (1)
#endif /* __KERNEL__ */
#endif /* _ASM_THREAD_INFO_H */

2
arch/sparc/include/asm/thread_info_64.h
View File

@ -221,6 +221,8 @@ register struct thread_info *current_thread_info_reg asm("g6");
_TIF_NEED_RESCHED)
#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
#define is_32bit_task() (test_thread_flag(TIF_32BIT))
/*
* Thread-synchronous status.
*

9
arch/sparc/kernel/ptrace_64.c
View File

@ -1076,13 +1076,8 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->u_regs[UREG_G1]);
audit_syscall_entry((test_thread_flag(TIF_32BIT) ?
AUDIT_ARCH_SPARC :
AUDIT_ARCH_SPARC64),
regs->u_regs[UREG_G1],
regs->u_regs[UREG_I0],
regs->u_regs[UREG_I1],
regs->u_regs[UREG_I2],
audit_syscall_entry(regs->u_regs[UREG_G1], regs->u_regs[UREG_I0],
regs->u_regs[UREG_I1], regs->u_regs[UREG_I2],
regs->u_regs[UREG_I3]);
return ret;

3
arch/um/kernel/ptrace.c
View File

@ -165,8 +165,7 @@ static void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs,
*/
void syscall_trace_enter(struct pt_regs *regs)
{
audit_syscall_entry(HOST_AUDIT_ARCH,
UPT_SYSCALL_NR(&regs->regs),
audit_syscall_entry(UPT_SYSCALL_NR(&regs->regs),
UPT_SYSCALL_ARG1(&regs->regs),
UPT_SYSCALL_ARG2(&regs->regs),
UPT_SYSCALL_ARG3(&regs->regs),

12
arch/x86/ia32/ia32entry.S
View File

@ -198,12 +198,12 @@ sysexit_from_sys_call:
#ifdef CONFIG_AUDITSYSCALL
.macro auditsys_entry_common
movl %esi,%r9d /* 6th arg: 4th syscall arg */
movl %edx,%r8d /* 5th arg: 3rd syscall arg */
/* (already in %ecx) 4th arg: 2nd syscall arg */
movl %ebx,%edx /* 3rd arg: 1st syscall arg */
movl %eax,%esi /* 2nd arg: syscall number */
movl $AUDIT_ARCH_I386,%edi /* 1st arg: audit arch */
movl %esi,%r8d /* 5th arg: 4th syscall arg */
movl %ecx,%r9d /*swap with edx*/
movl %edx,%ecx /* 4th arg: 3rd syscall arg */
movl %r9d,%edx /* 3rd arg: 2nd syscall arg */
movl %ebx,%esi /* 2nd arg: 1st syscall arg */
movl %eax,%edi /* 1st arg: syscall number */
call __audit_syscall_entry
movl RAX-ARGOFFSET(%rsp),%eax /* reload syscall number */
cmpq $(IA32_NR_syscalls-1),%rax

11
arch/x86/kernel/entry_32.S
View File

@ -449,12 +449,11 @@ sysenter_audit:
jnz syscall_trace_entry
addl $4,%esp
CFI_ADJUST_CFA_OFFSET -4
/* %esi already in 8(%esp) 6th arg: 4th syscall arg */
/* %edx already in 4(%esp) 5th arg: 3rd syscall arg */
/* %ecx already in 0(%esp) 4th arg: 2nd syscall arg */
movl %ebx,%ecx /* 3rd arg: 1st syscall arg */
movl %eax,%edx /* 2nd arg: syscall number */
movl $AUDIT_ARCH_I386,%eax /* 1st arg: audit arch */
movl %esi,4(%esp) /* 5th arg: 4th syscall arg */
movl %edx,(%esp) /* 4th arg: 3rd syscall arg */
/* %ecx already in %ecx 3rd arg: 2nd syscall arg */
movl %ebx,%edx /* 2nd arg: 1st syscall arg */
/* %eax already in %eax 1st arg: syscall number */
call __audit_syscall_entry
pushl_cfi %ebx
movl PT_EAX(%esp),%eax /* reload syscall number */

4
arch/x86/kernel/ptrace.c
View File

@ -1445,12 +1445,12 @@ static void do_audit_syscall_entry(struct pt_regs *regs, u32 arch)
{
#ifdef CONFIG_X86_64
if (arch == AUDIT_ARCH_X86_64) {
audit_syscall_entry(arch, regs->orig_ax, regs->di,
audit_syscall_entry(regs->orig_ax, regs->di,
regs->si, regs->dx, regs->r10);
} else
#endif
{
audit_syscall_entry(arch, regs->orig_ax, regs->bx,
audit_syscall_entry(regs->orig_ax, regs->bx,
regs->cx, regs->dx, regs->si);
}
}

4
arch/x86/um/asm/ptrace.h
View File

@ -47,8 +47,6 @@ struct user_desc;
#ifdef CONFIG_X86_32
#define HOST_AUDIT_ARCH AUDIT_ARCH_I386
extern int ptrace_get_thread_area(struct task_struct *child, int idx,
struct user_desc __user *user_desc);
@ -57,8 +55,6 @@ extern int ptrace_set_thread_area(struct task_struct *child, int idx,
#else
#define HOST_AUDIT_ARCH AUDIT_ARCH_X86_64
#define PT_REGS_R8(r) UPT_R8(&(r)->regs)
#define PT_REGS_R9(r) UPT_R9(&(r)->regs)
#define PT_REGS_R10(r) UPT_R10(&(r)->regs)

15
arch/x86/um/asm/syscall.h Normal file
View File

@ -0,0 +1,15 @@
#ifndef __UM_ASM_SYSCALL_H
#define __UM_ASM_SYSCALL_H
#include <uapi/linux/audit.h>
static inline int syscall_get_arch(void)
{
#ifdef CONFIG_X86_32
return AUDIT_ARCH_I386;
#else
return AUDIT_ARCH_X86_64;
#endif
}
#endif /* __UM_ASM_SYSCALL_H */

2
arch/xtensa/kernel/ptrace.c
View File

@ -342,7 +342,7 @@ void do_syscall_trace_enter(struct pt_regs *regs)
do_syscall_trace();
#if 0
audit_syscall_entry(current, AUDIT_ARCH_XTENSA..);
audit_syscall_entry(...);
#endif
}

2
include/asm-generic/syscall.h
View File

@ -147,7 +147,7 @@ void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
*
* Returns the AUDIT_ARCH_* based on the system call convention in use.
*
* It's only valid to call this when @task is stopped on entry to a system
* It's only valid to call this when current is stopped on entry to a system
* call, due to %TIF_SYSCALL_TRACE, %TIF_SYSCALL_AUDIT, or %TIF_SECCOMP.
*
* Architectures which permit CONFIG_HAVE_ARCH_SECCOMP_FILTER must

25
include/linux/audit.h
View File

@ -66,12 +66,16 @@ struct audit_krule {
struct audit_field {
u32 type;
u32 val;
kuid_t uid;
kgid_t gid;
union {
u32 val;
kuid_t uid;
kgid_t gid;
struct {
char *lsm_str;
void *lsm_rule;
};
};
u32 op;
char *lsm_str;
void *lsm_rule;
};
extern int is_audit_feature_set(int which);
@ -109,12 +113,13 @@ extern void audit_log_session_info(struct audit_buffer *ab);
#endif
#ifdef CONFIG_AUDITSYSCALL
#include <asm/syscall.h> /* for syscall_get_arch() */
/* 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(int arch,
int major, unsigned long a0, unsigned long a1,
extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3);
extern void __audit_syscall_exit(int ret_success, long ret_value);
extern struct filename *__audit_reusename(const __user char *uptr);
@ -141,12 +146,12 @@ static inline void audit_free(struct task_struct *task)
if (unlikely(task->audit_context))
__audit_free(task);
}
static inline void audit_syscall_entry(int arch, int major, unsigned long a0,
static inline void audit_syscall_entry(int major, unsigned long a0,
unsigned long a1, unsigned long a2,
unsigned long a3)
{
if (unlikely(current->audit_context))
__audit_syscall_entry(arch, major, a0, a1, a2, a3);
__audit_syscall_entry(major, a0, a1, a2, a3);
}
static inline void audit_syscall_exit(void *pt_regs)
{
@ -322,7 +327,7 @@ static inline int audit_alloc(struct task_struct *task)
}
static inline void audit_free(struct task_struct *task)
{ }
static inline void audit_syscall_entry(int arch, int major, unsigned long a0,
static inline void audit_syscall_entry(int major, unsigned long a0,
unsigned long a1, unsigned long a2,
unsigned long a3)
{ }

14
include/uapi/linux/audit.h
View File

@ -352,6 +352,7 @@ enum {
#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_MICROBLAZE (EM_MICROBLAZE)
#define AUDIT_ARCH_MIPS (EM_MIPS)
#define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
@ -445,17 +446,4 @@ struct audit_rule_data {
char buf[0]; /* string fields buffer */
};
/* audit_rule is supported to maintain backward compatibility with
* userspace. It supports integer fields only and corresponds to
* AUDIT_ADD, AUDIT_DEL and AUDIT_LIST requests.
*/
struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
__u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
__u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
__u32 field_count;
__u32 mask[AUDIT_BITMASK_SIZE];
__u32 fields[AUDIT_MAX_FIELDS];
__u32 values[AUDIT_MAX_FIELDS];
};
#endif /* _UAPI_LINUX_AUDIT_H_ */

1
include/uapi/linux/elf-em.h
View File

@ -32,6 +32,7 @@
#define EM_V850 87 /* NEC v850 */
#define EM_M32R 88 /* Renesas M32R */
#define EM_MN10300 89 /* Panasonic/MEI MN10300, AM33 */
#define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */
#define EM_BLACKFIN 106 /* ADI Blackfin Processor */
#define EM_TI_C6000 140 /* TI C6X DSPs */
#define EM_AARCH64 183 /* ARM 64 bit */

30
kernel/audit.c
View File

@ -126,7 +126,7 @@ static atomic_t audit_lost = ATOMIC_INIT(0);
/* The netlink socket. */
static struct sock *audit_sock;
int audit_net_id;
static int audit_net_id;
/* Hash for inode-based rules */
struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
@ -724,7 +724,7 @@ static int audit_get_feature(struct sk_buff *skb)
seq = nlmsg_hdr(skb)->nlmsg_seq;
audit_send_reply(skb, seq, AUDIT_GET, 0, 0, &af, sizeof(af));
audit_send_reply(skb, seq, AUDIT_GET_FEATURE, 0, 0, &af, sizeof(af));
return 0;
}
@ -750,7 +750,7 @@ static int audit_set_feature(struct sk_buff *skb)
struct audit_features *uaf;
int i;
BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > sizeof(audit_feature_names)/sizeof(audit_feature_names[0]));
BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names));
uaf = nlmsg_data(nlmsg_hdr(skb));
/* if there is ever a version 2 we should handle that here */
@ -1301,19 +1301,9 @@ static struct audit_buffer * audit_buffer_alloc(struct audit_context *ctx,
*/
unsigned int audit_serial(void)
{
static DEFINE_SPINLOCK(serial_lock);
static unsigned int serial = 0;
static atomic_t serial = ATOMIC_INIT(0);
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(&serial_lock, flags);
do {
ret = ++serial;
} while (unlikely(!ret));
spin_unlock_irqrestore(&serial_lock, flags);
return ret;
return atomic_add_return(1, &serial);
}
static inline void audit_get_stamp(struct audit_context *ctx,
@ -1681,7 +1671,7 @@ void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
}
}
void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
{
kernel_cap_t *perm = &name->fcap.permitted;
kernel_cap_t *inh = &name->fcap.inheritable;
@ -1860,7 +1850,7 @@ EXPORT_SYMBOL(audit_log_task_context);
void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
{
const struct cred *cred;
char name[sizeof(tsk->comm)];
char comm[sizeof(tsk->comm)];
struct mm_struct *mm = tsk->mm;
char *tty;
@ -1894,9 +1884,8 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
from_kgid(&init_user_ns, cred->fsgid),
tty, audit_get_sessionid(tsk));
get_task_comm(name, tsk);
audit_log_format(ab, " comm=");
audit_log_untrustedstring(ab, name);
audit_log_untrustedstring(ab, get_task_comm(comm, tsk));
if (mm) {
down_read(&mm->mmap_sem);
@ -1959,6 +1948,7 @@ void audit_log_end(struct audit_buffer *ab)
} else {
struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
nlh->nlmsg_len = ab->skb->len;
kauditd_send_multicast_skb(ab->skb);
/*
@ -1970,7 +1960,7 @@ void audit_log_end(struct audit_buffer *ab)
* protocol between the kaudit kernel subsystem and the auditd
* userspace code.
*/
nlh->nlmsg_len = ab->skb->len - NLMSG_HDRLEN;
nlh->nlmsg_len -= NLMSG_HDRLEN;
if (audit_pid) {
skb_queue_tail(&audit_skb_queue, ab->skb);

1
kernel/audit.h
View File

@ -222,7 +222,6 @@ extern void audit_copy_inode(struct audit_names *name,
const struct inode *inode);
extern void audit_log_cap(struct audit_buffer *ab, char *prefix,
kernel_cap_t *cap);
extern void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name);
extern void audit_log_name(struct audit_context *context,
struct audit_names *n, struct path *path,
int record_num, int *call_panic);

6
kernel/audit_tree.c
View File

@ -449,7 +449,7 @@ static int tag_chunk(struct inode *inode, struct audit_tree *tree)
return 0;
}
static void audit_log_remove_rule(struct audit_krule *rule)
static void audit_tree_log_remove_rule(struct audit_krule *rule)
{
struct audit_buffer *ab;
@ -457,7 +457,7 @@ static void audit_log_remove_rule(struct audit_krule *rule)
if (unlikely(!ab))
return;
audit_log_format(ab, "op=");
audit_log_string(ab, "remove rule");
audit_log_string(ab, "remove_rule");
audit_log_format(ab, " dir=");
audit_log_untrustedstring(ab, rule->tree->pathname);
audit_log_key(ab, rule->filterkey);
@ -476,7 +476,7 @@ static void kill_rules(struct audit_tree *tree)
list_del_init(&rule->rlist);
if (rule->tree) {
/* not a half-baked one */
audit_log_remove_rule(rule);
audit_tree_log_remove_rule(rule);
rule->tree = NULL;
list_del_rcu(&entry->list);
list_del(&entry->rule.list);

4
kernel/audit_watch.c
View File

@ -314,7 +314,7 @@ static void audit_update_watch(struct audit_parent *parent,
&nentry->rule.list);
}
audit_watch_log_rule_change(r, owatch, "updated rules");
audit_watch_log_rule_change(r, owatch, "updated_rules");
call_rcu(&oentry->rcu, audit_free_rule_rcu);
}
@ -342,7 +342,7 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
list_for_each_entry_safe(w, nextw, &parent->watches, wlist) {
list_for_each_entry_safe(r, nextr, &w->rules, rlist) {
e = container_of(r, struct audit_entry, rule);
audit_watch_log_rule_change(r, w, "remove rule");
audit_watch_log_rule_change(r, w, "remove_rule");
list_del(&r->rlist);
list_del(&r->list);
list_del_rcu(&e->list);

56
kernel/auditfilter.c
View File

@ -71,6 +71,24 @@ static struct list_head audit_rules_list[AUDIT_NR_FILTERS] = {
DEFINE_MUTEX(audit_filter_mutex);
static void audit_free_lsm_field(struct audit_field *f)
{
switch (f->type) {
case AUDIT_SUBJ_USER:
case AUDIT_SUBJ_ROLE:
case AUDIT_SUBJ_TYPE:
case AUDIT_SUBJ_SEN:
case AUDIT_SUBJ_CLR:
case AUDIT_OBJ_USER:
case AUDIT_OBJ_ROLE:
case AUDIT_OBJ_TYPE:
case AUDIT_OBJ_LEV_LOW:
case AUDIT_OBJ_LEV_HIGH:
kfree(f->lsm_str);
security_audit_rule_free(f->lsm_rule);
}
}
static inline void audit_free_rule(struct audit_entry *e)
{
int i;
@ -80,11 +98,8 @@ static inline void audit_free_rule(struct audit_entry *e)
if (erule->watch)
audit_put_watch(erule->watch);
if (erule->fields)
for (i = 0; i < erule->field_count; i++) {
struct audit_field *f = &erule->fields[i];
kfree(f->lsm_str);
security_audit_rule_free(f->lsm_rule);
}
for (i = 0; i < erule->field_count; i++)
audit_free_lsm_field(&erule->fields[i]);
kfree(erule->fields);
kfree(erule->filterkey);
kfree(e);
@ -148,7 +163,7 @@ static inline int audit_to_inode(struct audit_krule *krule,
struct audit_field *f)
{
if (krule->listnr != AUDIT_FILTER_EXIT ||
krule->watch || krule->inode_f || krule->tree ||
krule->inode_f || krule->watch || krule->tree ||
(f->op != Audit_equal && f->op != Audit_not_equal))
return -EINVAL;
@ -422,10 +437,6 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
f->type = data->fields[i];
f->val = data->values[i];
f->uid = INVALID_UID;
f->gid = INVALID_GID;
f->lsm_str = NULL;
f->lsm_rule = NULL;
/* Support legacy tests for a valid loginuid */
if ((f->type == AUDIT_LOGINUID) && (f->val == AUDIT_UID_UNSET)) {
@ -1053,30 +1064,27 @@ int audit_rule_change(int type, __u32 portid, int seq, void *data,
int err = 0;
struct audit_entry *entry;
entry = audit_data_to_entry(data, datasz);
if (IS_ERR(entry))
return PTR_ERR(entry);
switch (type) {
case AUDIT_ADD_RULE:
entry = audit_data_to_entry(data, datasz);
if (IS_ERR(entry))
return PTR_ERR(entry);
err = audit_add_rule(entry);
audit_log_rule_change("add rule", &entry->rule, !err);
if (err)
audit_free_rule(entry);
audit_log_rule_change("add_rule", &entry->rule, !err);
break;
case AUDIT_DEL_RULE:
entry = audit_data_to_entry(data, datasz);
if (IS_ERR(entry))
return PTR_ERR(entry);
err = audit_del_rule(entry);
audit_log_rule_change("remove rule", &entry->rule, !err);
audit_free_rule(entry);
audit_log_rule_change("remove_rule", &entry->rule, !err);
break;
default:
return -EINVAL;
err = -EINVAL;
WARN_ON(1);
}
if (err || type == AUDIT_DEL_RULE)
audit_free_rule(entry);
return err;
}

28
kernel/auditsc.c
View File

@ -67,6 +67,7 @@
#include <linux/binfmts.h>
#include <linux/highmem.h>
#include <linux/syscalls.h>
#include <asm/syscall.h>
#include <linux/capability.h>
#include <linux/fs_struct.h>
#include <linux/compat.h>
@ -125,14 +126,6 @@ struct audit_tree_refs {
struct audit_chunk *c[31];
};
static inline int open_arg(int flags, int mask)
{
int n = ACC_MODE(flags);
if (flags & (O_TRUNC | O_CREAT))
n |= AUDIT_PERM_WRITE;
return n & mask;
}
static int audit_match_perm(struct audit_context *ctx, int mask)
{
unsigned n;
@ -1505,7 +1498,6 @@ void __audit_free(struct task_struct *tsk)
/**
* audit_syscall_entry - fill in an audit record at syscall entry
* @arch: architecture type
* @major: major syscall type (function)
* @a1: additional syscall register 1
* @a2: additional syscall register 2
@ -1520,9 +1512,8 @@ void __audit_free(struct task_struct *tsk)
* will only be written if another part of the kernel requests that it
* be written).
*/
void __audit_syscall_entry(int arch, int major,
unsigned long a1, unsigned long a2,
unsigned long a3, unsigned long a4)
void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
unsigned long a3, unsigned long a4)
{
struct task_struct *tsk = current;
struct audit_context *context = tsk->audit_context;
@ -1536,7 +1527,7 @@ void __audit_syscall_entry(int arch, int major,
if (!audit_enabled)
return;
context->arch = arch;
context->arch = syscall_get_arch();
context->major = major;
context->argv[0] = a1;
context->argv[1] = a2;
@ -2433,6 +2424,7 @@ static void audit_log_task(struct audit_buffer *ab)
kgid_t gid;
unsigned int sessionid;
struct mm_struct *mm = current->mm;
char comm[sizeof(current->comm)];
auid = audit_get_loginuid(current);
sessionid = audit_get_sessionid(current);
@ -2445,7 +2437,7 @@ static void audit_log_task(struct audit_buffer *ab)
sessionid);
audit_log_task_context(ab);
audit_log_format(ab, " pid=%d comm=", task_pid_nr(current));
audit_log_untrustedstring(ab, current->comm);
audit_log_untrustedstring(ab, get_task_comm(comm, current));
if (mm) {
down_read(&mm->mmap_sem);
if (mm->exe_file)
@ -2488,11 +2480,9 @@ void __audit_seccomp(unsigned long syscall, long signr, int code)
if (unlikely(!ab))
return;
audit_log_task(ab);
audit_log_format(ab, " sig=%ld", signr);
audit_log_format(ab, " syscall=%ld", syscall);
audit_log_format(ab, " compat=%d", is_compat_task());
audit_log_format(ab, " ip=0x%lx", KSTK_EIP(current));
audit_log_format(ab, " code=0x%x", code);
audit_log_format(ab, " sig=%ld arch=%x syscall=%ld compat=%d ip=0x%lx code=0x%x",
signr, syscall_get_arch(), syscall, is_compat_task(),
KSTK_EIP(current), code);
audit_log_end(ab);
}