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Wed, 14 Nov 2018 15:40:42 -0800 (PST) Date: Wed, 14 Nov 2018 15:40:42 -0800 (PST) X-Google-Original-Date: Wed, 14 Nov 2018 14:45:14 PST (-0800) Subject: Re: [PATCH 1/2] riscv: add audit support In-Reply-To: From: Palmer Dabbelt To: paul@paul-moore.com Message-ID: Mime-Version: 1.0 (MHng) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181114_154054_354113_E60322BD X-CRM114-Status: GOOD ( 24.84 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-audit@redhat.com, linux-riscv@lists.infradead.org, aou@eecs.berkeley.edu, linux-kernel@vger.kernel.org, david.abdurachmanov@gmail.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org Message-ID: <20181114234042.8326hqDecnFlwwZMhyHYEKE_MIQSHIg3-SF_kGG3RAU@z> On Tue, 13 Nov 2018 15:34:18 PST (-0800), paul@paul-moore.com wrote: > On Tue, Nov 13, 2018 at 5:07 AM Palmer Dabbelt wrote: >> On Mon, 29 Oct 2018 03:48:53 PDT (-0700), david.abdurachmanov@gmail.com wrote: >> > On RISC-V (riscv) audit is supported through generic lib/audit.c. >> > The patch adds required arch specific definitions. >> > >> > Signed-off-by: David Abdurachmanov >> > --- >> > arch/riscv/Kconfig | 1 + >> > arch/riscv/include/asm/ptrace.h | 5 +++++ >> > arch/riscv/include/asm/syscall.h | 10 ++++++++++ >> > arch/riscv/include/asm/thread_info.h | 6 ++++++ >> > arch/riscv/kernel/entry.S | 4 ++-- >> > include/uapi/linux/audit.h | 2 ++ >> > 6 files changed, 26 insertions(+), 2 deletions(-) >> > >> > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig >> > index a344980287a5..8e6d404a4ed0 100644 >> > --- a/arch/riscv/Kconfig >> > +++ b/arch/riscv/Kconfig >> > @@ -28,6 +28,7 @@ config RISCV >> > select GENERIC_STRNLEN_USER >> > select GENERIC_SMP_IDLE_THREAD >> > select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A >> > + select HAVE_ARCH_AUDITSYSCALL >> > select HAVE_MEMBLOCK >> > select HAVE_MEMBLOCK_NODE_MAP >> > select HAVE_DMA_CONTIGUOUS >> > diff --git a/arch/riscv/include/asm/ptrace.h b/arch/riscv/include/asm/ptrace.h >> > index 2c5df945d43c..62c5e9d35596 100644 >> > --- a/arch/riscv/include/asm/ptrace.h >> > +++ b/arch/riscv/include/asm/ptrace.h >> > @@ -113,6 +113,11 @@ static inline void frame_pointer_set(struct pt_regs *regs, >> > SET_FP(regs, val); >> > } >> > >> > +static inline unsigned long regs_return_value(struct pt_regs *regs) >> > +{ >> > + return regs->a0; >> > +} >> > + >> > #endif /* __ASSEMBLY__ */ >> > >> > #endif /* _ASM_RISCV_PTRACE_H */ >> > diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h >> > index 8d25f8904c00..bba3da6ef157 100644 >> > --- a/arch/riscv/include/asm/syscall.h >> > +++ b/arch/riscv/include/asm/syscall.h >> > @@ -18,6 +18,7 @@ >> > #ifndef _ASM_RISCV_SYSCALL_H >> > #define _ASM_RISCV_SYSCALL_H >> > >> > +#include >> > #include >> > #include >> > >> > @@ -99,4 +100,13 @@ static inline void syscall_set_arguments(struct task_struct *task, >> > memcpy(®s->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0)); >> > } >> > >> > +static inline int syscall_get_arch(void) >> > +{ >> > +#ifdef CONFIG_64BIT >> > + return AUDIT_ARCH_RISCV64; >> > +#else >> > + return AUDIT_ARCH_RISCV32; >> > +#endif >> > +} >> > + >> > #endif /* _ASM_RISCV_SYSCALL_H */ >> > diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h >> > index f8fa1cd2dad9..1c9cc8389928 100644 >> > --- a/arch/riscv/include/asm/thread_info.h >> > +++ b/arch/riscv/include/asm/thread_info.h >> > @@ -80,13 +80,19 @@ struct thread_info { >> > #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ >> > #define TIF_MEMDIE 5 /* is terminating due to OOM killer */ >> > #define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ >> > +#define TIF_SYSCALL_AUDIT 7 /* syscall auditing */ >> > >> > #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) >> > #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) >> > #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) >> > #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) >> > +#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) >> > +#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) >> > >> > #define _TIF_WORK_MASK \ >> > (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NEED_RESCHED) >> > >> > +#define _TIF_SYSCALL_WORK \ >> > + (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT) >> > + >> > #endif /* _ASM_RISCV_THREAD_INFO_H */ >> > diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S >> > index fa2c08e3c05e..2a6c2e7aaff3 100644 >> > --- a/arch/riscv/kernel/entry.S >> > +++ b/arch/riscv/kernel/entry.S >> > @@ -202,7 +202,7 @@ handle_syscall: >> > REG_S s2, PT_SEPC(sp) >> > /* Trace syscalls, but only if requested by the user. */ >> > REG_L t0, TASK_TI_FLAGS(tp) >> > - andi t0, t0, _TIF_SYSCALL_TRACE >> > + andi t0, t0, _TIF_SYSCALL_WORK >> > bnez t0, handle_syscall_trace_enter >> > check_syscall_nr: >> > /* Check to make sure we don't jump to a bogus syscall number. */ >> > @@ -222,7 +222,7 @@ ret_from_syscall: >> > REG_S a0, PT_A0(sp) >> > /* Trace syscalls, but only if requested by the user. */ >> > REG_L t0, TASK_TI_FLAGS(tp) >> > - andi t0, t0, _TIF_SYSCALL_TRACE >> > + andi t0, t0, _TIF_SYSCALL_WORK >> > bnez t0, handle_syscall_trace_exit >> > >> > ret_from_exception: >> > diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h >> > index 818ae690ab79..d0e037a96a7b 100644 >> > --- a/include/uapi/linux/audit.h >> > +++ b/include/uapi/linux/audit.h >> > @@ -399,6 +399,8 @@ enum { >> > /* do not define AUDIT_ARCH_PPCLE since it is not supported by audit */ >> > #define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT) >> > #define AUDIT_ARCH_PPC64LE (EM_PPC64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) >> > +#define AUDIT_ARCH_RISCV32 (EM_RISCV|__AUDIT_ARCH_LE) >> > +#define AUDIT_ARCH_RISCV64 (EM_RISCV|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) >> > #define AUDIT_ARCH_S390 (EM_S390) >> > #define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT) >> > #define AUDIT_ARCH_SH (EM_SH) >> >> I can't seem to figure out how to dig the rest of the thread out of my inbox >> (I'm in an airport), so I'm just replying here. >> >> I've added this to next-audit, which will soon filter into for-next. I'm not >> sure if this is 100% settled, but I can't find any issues with it so I think >> it's best to get this out for testing. > > If you RISCV guys are happy, and it is passing the audit-testsuite > (which I believe it is based on some brief discussions with David on > Freenode), then I think it is okay from my point of view. I haven't run the test suite personally, but I trust that David has done so if he said so (I remember having seen him say he did as well). Thanks! _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv