Messages in this thread Patch in this message | | | Date | Wed, 07 Nov 2007 14:04:46 +0900 | From | Yuichi Nakamura <> | Subject | [patch] audit support for SH |
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I found syscall audit does not work on SH(SuperH). I made patch to support syscall audit for SH.
Signed-off-by: Yuichi Nakamura<ynakam@hitachisoft.jp> --- arch/sh/kernel/entry-common.S | 8 ++++++-- arch/sh/kernel/ptrace.c | 19 +++++++++++++++---- include/asm-sh/thread_info.h | 2 ++ init/Kconfig | 2 +- 4 files changed, 24 insertions(+), 7 deletions(-) diff -purN -X linux-2.6.24.rc1/Documentation/dontdiff linux-2.6.24.rc1.orig/arch/sh/kernel/entry-common.S linux-2.6.24.rc1/arch/sh/kernel/entry-common.S --- linux-2.6.24.rc1.orig/arch/sh/kernel/entry-common.S 2007-11-06 16:03:17.000000000 +0900 +++ linux-2.6.24.rc1/arch/sh/kernel/entry-common.S 2007-11-06 18:16:11.000000000 +0900 @@ -224,7 +224,7 @@ work_resched: syscall_exit_work: ! r0: current_thread_info->flags ! r8: current_thread_info - tst #_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP, r0 + tst #_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP |_TIF_SYSCALL_AUDIT, r0 bt/s work_pending tst #_TIF_NEED_RESCHED, r0 #ifdef CONFIG_TRACE_IRQFLAGS @@ -234,6 +234,8 @@ syscall_exit_work: #endif sti ! XXX setup arguments... + mov r15, r4 + mov #1, r5 mov.l 4f, r0 ! do_syscall_trace jsr @r0 nop @@ -244,6 +246,8 @@ syscall_exit_work: syscall_trace_entry: ! Yes it is traced. ! XXX setup arguments... + mov r15, r4 + mov #0, r5 mov.l 4f, r11 ! Call do_syscall_trace which notifies jsr @r11 ! superior (will chomp R[0-7]) nop @@ -366,7 +370,7 @@ ENTRY(system_call) ! get_current_thread_info r8, r10 mov.l @(TI_FLAGS,r8), r8 - mov #_TIF_SYSCALL_TRACE, r10 + mov #(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT), r10 tst r10, r8 bf syscall_trace_entry ! diff -purN -X linux-2.6.24.rc1/Documentation/dontdiff linux-2.6.24.rc1.orig/arch/sh/kernel/ptrace.c linux-2.6.24.rc1/arch/sh/kernel/ptrace.c --- linux-2.6.24.rc1.orig/arch/sh/kernel/ptrace.c 2007-11-06 16:03:17.000000000 +0900 +++ linux-2.6.24.rc1/arch/sh/kernel/ptrace.c 2007-11-07 08:46:14.000000000 +0900 @@ -6,7 +6,7 @@ * edited by Linus Torvalds * * SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka - * + * Audit support: Yuichi Nakamura <ynakam@hitachisoft.jp> */ #include <linux/kernel.h> #include <linux/sched.h> @@ -24,6 +24,7 @@ #include <asm/system.h> #include <asm/processor.h> #include <asm/mmu_context.h> +#include <linux/audit.h> /* * does not yet catch signals sent when the child dies. @@ -248,15 +249,18 @@ long arch_ptrace(struct task_struct *chi return ret; } -asmlinkage void do_syscall_trace(void) +asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit) { struct task_struct *tsk = current; + if (unlikely(current->audit_context) && entryexit) + audit_syscall_exit(AUDITSC_RESULT(regs->regs[0]), + regs->regs[0]); if (!test_thread_flag(TIF_SYSCALL_TRACE) && !test_thread_flag(TIF_SINGLESTEP)) - return; + goto out; if (!(tsk->ptrace & PT_PTRACED)) - return; + goto out; /* the 0x80 provides a way for the tracing parent to distinguish between a syscall stop and SIGTRAP delivery */ ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) && @@ -271,4 +275,11 @@ asmlinkage void do_syscall_trace(void) send_sig(tsk->exit_code, tsk, 1); tsk->exit_code = 0; } + +out: + if (unlikely(current->audit_context) && !entryexit) + audit_syscall_entry(AUDIT_ARCH_SH, regs->regs[3], + regs->regs[4], regs->regs[5], + regs->regs[6], regs->regs[7]); + } --- linux-2.6.24.rc1.orig/include/asm-sh/thread_info.h 2007-10-10 05:31:38.000000000 +0900 +++ linux-2.6.24.rc1/include/asm-sh/thread_info.h 2007-11-07 08:46:37.000000000 +0900 @@ -111,6 +111,7 @@ static inline struct thread_info *curren #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ #define TIF_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */ #define TIF_SINGLESTEP 4 /* singlestepping active */ +#define TIF_SYSCALL_AUDIT 5 #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define TIF_MEMDIE 18 @@ -121,6 +122,7 @@ static inline struct thread_info *curren #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) +#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) #define _TIF_USEDFPU (1<<TIF_USEDFPU) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) #define _TIF_FREEZE (1<<TIF_FREEZE) --- linux-2.6.24.rc1.orig/init/Kconfig 2007-11-06 16:03:31.000000000 +0900 +++ linux-2.6.24.rc1/init/Kconfig 2007-11-06 16:19:08.000000000 +0900 @@ -226,7 +226,7 @@ config AUDIT config AUDITSYSCALL bool "Enable system-call auditing support" - depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64) + depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64|| SUPERH) default y if SECURITY_SELINUX help Enable low-overhead system-call auditing infrastructure that
Regards, -- Yuichi Nakamura Hitachi Software Engineering Co., Ltd. Japan SELinux Users Group(JSELUG): http://www.selinux.gr.jp/ SELinux Policy Editor: http://seedit.sourceforge.net/
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