Re: [RFC PATCH v2 1/1] audit: Add generic compat syscall support

(v1 was created mistakenly. Please igore it.) lib/audit.c provides a generic definition for auditing system calls. lib/compat_audit.c similarly adds compat syscall support for bi-architectures (32/64-bit). Each architecture must define audit_is_compat() in asm/audit.h. Signed-off-by: AKASHI Takahiro <takahiro.akashi(a)linaro.org&gt; --- include/linux/audit.h | 9 +++++++++ lib/Makefile | 3 +++ lib/audit.c | 17 +++++++++++++++++ lib/compat_audit.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 80 insertions(+) create mode 100644 lib/compat_audit.c diff --git a/include/linux/audit.h b/include/linux/audit.h index 729a4d1..c49a312 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -76,6 +76,15 @@ struct audit_field { extern int __init audit_register_class(int class, unsigned *list); extern int audit_classify_syscall(int abi, unsigned syscall); extern int audit_classify_arch(int arch); +#if defined(CONFIG_AUDIT_GENERIC) && defined(CONFIG_COMPAT) +extern unsigned compat_write_class[]; +extern unsigned compat_read_class[]; +extern unsigned compat_dir_class[]; +extern unsigned compat_chattr_class[]; +extern unsigned compat_signal_class[]; + +extern int audit_classify_compat_syscall(int abi, unsigned syscall); +#endif /* audit_names->type values */ #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */ diff --git a/lib/Makefile b/lib/Makefile index f3bb2cb..5bb185a 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -96,6 +96,9 @@ obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o obj-$(CONFIG_SMP) += percpu_counter.o obj-$(CONFIG_AUDIT_GENERIC) += audit.o +ifeq ($(CONFIG_COMPAT),y) +obj-$(CONFIG_AUDIT_GENERIC) += compat_audit.o +endif obj-$(CONFIG_SWIOTLB) += swiotlb.o obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o diff --git a/lib/audit.c b/lib/audit.c index 76bbed4..3bf3858 100644 --- a/lib/audit.c +++ b/lib/audit.c @@ -1,6 +1,7 @@ #include <linux/init.h> #include <linux/types.h> #include <linux/audit.h> +#include <asm/audit.h> #include <asm/unistd.h> static unsigned dir_class[] = { @@ -30,11 +31,20 @@ static unsigned signal_class[] = { int audit_classify_arch(int arch) { +#ifdef CONFIG_COMPAT + if (audit_is_compat(arch)) + return 1; +#endif return 0; } int audit_classify_syscall(int abi, unsigned syscall) { +#ifdef CONFIG_COMPAT + if (audit_is_compat(abi)) + return audit_classify_compat_syscall(abi, syscall); +#endif