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parisc: add kernel audit feature

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Implement missing functions for parisc to provide kernel audit feature.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2013-10-15 19:25:46 +02:00
parent 61dbbaeb86
commit 527973c840
8 changed files with 157 additions and 5 deletions
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3
arch/parisc/Kconfig
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@ -287,6 +287,9 @@ config SYSVIPC_COMPAT
def_bool y
depends on COMPAT && SYSVIPC
config AUDIT_ARCH
def_bool y
config HPUX
bool "Support for HP-UX binaries"
depends on !64BIT

4
arch/parisc/include/asm/ptrace.h
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@ -19,5 +19,9 @@
#define user_stack_pointer(regs) ((regs)->gr[30])
unsigned long profile_pc(struct pt_regs *);
static inline unsigned long regs_return_value(struct pt_regs *regs)
{
return regs->gr[20];
}
#endif

4
arch/parisc/include/asm/thread_info.h
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@ -59,6 +59,7 @@ struct thread_info {
#define TIF_32BIT 4 /* 32 bit binary */
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
#define TIF_NOTIFY_RESUME 8 /* callback before returning to user */
#define TIF_SINGLESTEP 9 /* single stepping? */
#define TIF_BLOCKSTEP 10 /* branch stepping? */
@ -68,6 +69,7 @@ struct thread_info {
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_32BIT (1 << TIF_32BIT)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
@ -75,7 +77,7 @@ struct thread_info {
#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
_TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
_TIF_BLOCKSTEP)
_TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT)
#endif /* __KERNEL__ */

4
arch/parisc/kernel/Makefile
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@ -29,7 +29,9 @@ obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_64BIT) += binfmt_elf32.o sys_parisc32.o signal32.o
obj-$(CONFIG_STACKTRACE)+= stacktrace.o
obj-$(CONFIG_AUDIT) += audit.o
obj64-$(CONFIG_AUDIT) += compat_audit.o
# only supported for PCX-W/U in 64-bit mode at the moment
obj-$(CONFIG_64BIT) += perf.o perf_asm.o
obj-$(CONFIG_64BIT) += perf.o perf_asm.o $(obj64-y)
obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o

81
arch/parisc/kernel/audit.c Normal file
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@ -0,0 +1,81 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/audit.h>
#include <asm/unistd.h>
static unsigned dir_class[] = {
#include <asm-generic/audit_dir_write.h>
~0U
};
static unsigned read_class[] = {
#include <asm-generic/audit_read.h>
~0U
};
static unsigned write_class[] = {
#include <asm-generic/audit_write.h>
~0U
};
static unsigned chattr_class[] = {
#include <asm-generic/audit_change_attr.h>
~0U
};
static unsigned signal_class[] = {
#include <asm-generic/audit_signal.h>
~0U
};
int audit_classify_arch(int arch)
{
#ifdef CONFIG_COMPAT
if (arch == AUDIT_ARCH_PARISC)
return 1;
#endif
return 0;
}
int audit_classify_syscall(int abi, unsigned syscall)
{
#ifdef CONFIG_COMPAT
extern int parisc32_classify_syscall(unsigned);
if (abi == AUDIT_ARCH_PARISC)
return parisc32_classify_syscall(syscall);
#endif
switch (syscall) {
case __NR_open:
return 2;
case __NR_openat:
return 3;
case __NR_execve:
return 5;
default:
return 0;
}
}
static int __init audit_classes_init(void)
{
#ifdef CONFIG_COMPAT
extern __u32 parisc32_dir_class[];
extern __u32 parisc32_write_class[];
extern __u32 parisc32_read_class[];
extern __u32 parisc32_chattr_class[];
extern __u32 parisc32_signal_class[];
audit_register_class(AUDIT_CLASS_WRITE_32, parisc32_write_class);
audit_register_class(AUDIT_CLASS_READ_32, parisc32_read_class);
audit_register_class(AUDIT_CLASS_DIR_WRITE_32, parisc32_dir_class);
audit_register_class(AUDIT_CLASS_CHATTR_32, parisc32_chattr_class);
audit_register_class(AUDIT_CLASS_SIGNAL_32, parisc32_signal_class);
#endif
audit_register_class(AUDIT_CLASS_WRITE, write_class);
audit_register_class(AUDIT_CLASS_READ, read_class);
audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
return 0;
}
__initcall(audit_classes_init);

40
arch/parisc/kernel/compat_audit.c Normal file
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@ -0,0 +1,40 @@
#include <asm/unistd.h>
unsigned int parisc32_dir_class[] = {
#include <asm-generic/audit_dir_write.h>
~0U
};
unsigned int parisc32_chattr_class[] = {
#include <asm-generic/audit_change_attr.h>
~0U
};
unsigned int parisc32_write_class[] = {
#include <asm-generic/audit_write.h>
~0U
};
unsigned int parisc32_read_class[] = {
#include <asm-generic/audit_read.h>
~0U
};
unsigned int parisc32_signal_class[] = {
#include <asm-generic/audit_signal.h>
~0U
};
int parisc32_classify_syscall(unsigned syscall)
{
switch (syscall) {
case __NR_open:
return 2;
case __NR_openat:
return 3;
case __NR_execve:
return 5;
default:
return 1;
}
}

24
arch/parisc/kernel/ptrace.c
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@ -19,6 +19,7 @@
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/signal.h>
#include <linux/audit.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@ -267,11 +268,28 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret = 0;
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(regs))
return -1L;
ret = -1L;
return regs->gr[20];
#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]);
else
#endif
audit_syscall_entry(AUDIT_ARCH_PARISC,
regs->gr[20] & 0xffffffff,
regs->gr[26] & 0xffffffff,
regs->gr[25] & 0xffffffff,
regs->gr[24] & 0xffffffff,
regs->gr[23] & 0xffffffff);
return ret ? : regs->gr[20];
}
void do_syscall_trace_exit(struct pt_regs *regs)
@ -279,6 +297,8 @@ void do_syscall_trace_exit(struct pt_regs *regs)
int stepping = test_thread_flag(TIF_SINGLESTEP) ||
test_thread_flag(TIF_BLOCKSTEP);
audit_syscall_exit(regs);
if (stepping || test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, stepping);
}

2
init/Kconfig
View File

@ -284,7 +284,7 @@ config AUDIT
config AUDITSYSCALL
bool "Enable system-call auditing support"
depends on AUDIT && (X86 || PPC || S390 || IA64 || UML || SPARC64 || SUPERH || (ARM && AEABI && !OABI_COMPAT))
depends on AUDIT && (X86 || PARISC || PPC || S390 || IA64 || UML || SPARC64 || SUPERH || (ARM && AEABI && !OABI_COMPAT))
default y if SECURITY_SELINUX
help
Enable low-overhead system-call auditing infrastructure that