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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-31 14:24:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-31 14:24:56 -0800
commitbcc9f96681a1e272b38f16e324d4510823f85730 (patch)
tree415bfe9058797568ea9e894dace067018ba232a2 /arch
parentb399c46ea0070671f3abbe1915d26076101a42f2 (diff)
parent0ef38d70d4118b2ce1a538d14357be5ff9dc2bbd (diff)
downloadlinux-linaro-stable-bcc9f96681a1e272b38f16e324d4510823f85730.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha
Pull alpha updates from Matt Turner: "A pair of changes for alpha. One fixes a networking regression, and the second adds audit syscall support which will help in supporting systemd" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha: alpha: fix broken network checksum alpha: Enable system-call auditing support.
Diffstat (limited to 'arch')
-rw-r--r--arch/alpha/Kconfig3
-rw-r--r--arch/alpha/include/asm/ptrace.h5
-rw-r--r--arch/alpha/include/asm/thread_info.h2
-rw-r--r--arch/alpha/kernel/Makefile1
-rw-r--r--arch/alpha/kernel/audit.c60
-rw-r--r--arch/alpha/kernel/entry.S6
-rw-r--r--arch/alpha/kernel/ptrace.c4
-rw-r--r--arch/alpha/lib/csum_partial_copy.c9
8 files changed, 87 insertions, 3 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 97a2d9a096b9..f6c6b345388c 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -17,6 +17,7 @@ config ALPHA
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+ select AUDIT_ARCH
select GENERIC_CLOCKEVENTS
select GENERIC_SMP_IDLE_THREAD
select GENERIC_STRNCPY_FROM_USER
@@ -77,6 +78,8 @@ config GENERIC_ISA_DMA
source "init/Kconfig"
source "kernel/Kconfig.freezer"
+config AUDIT_ARCH
+ bool
menu "System setup"
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index 21128505ddbe..9047c2fe8f23 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -19,4 +19,9 @@
#define force_successful_syscall_return() (current_pt_regs()->r0 = 0)
+static inline unsigned long regs_return_value(struct pt_regs *regs)
+{
+ return regs->r0;
+}
+
#endif
diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h
index 453597b91f3a..3d6ce6d56fc9 100644
--- a/arch/alpha/include/asm/thread_info.h
+++ b/arch/alpha/include/asm/thread_info.h
@@ -70,6 +70,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
+#define TIF_SYSCALL_AUDIT 4 /* syscall audit active */
#define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */
#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
@@ -77,6 +78,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
/* Work to do on interrupt/exception return. */
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index 0d54650e78fc..3ecac0106c8a 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_SRM_ENV) += srm_env.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o
obj-$(CONFIG_RTC_DRV_ALPHA) += rtc.o
+obj-$(CONFIG_AUDIT) += audit.o
ifdef CONFIG_ALPHA_GENERIC
diff --git a/arch/alpha/kernel/audit.c b/arch/alpha/kernel/audit.c
new file mode 100644
index 000000000000..96a9d18ff4c4
--- /dev/null
+++ b/arch/alpha/kernel/audit.c
@@ -0,0 +1,60 @@
+#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)
+{
+ return 0;
+}
+
+int audit_classify_syscall(int abi, unsigned syscall)
+{
+ 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)
+{
+ 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);
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index a969b95ee5ac..98703d99b565 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -465,7 +465,11 @@ entSys:
.cfi_rel_offset $16, SP_OFF+24
.cfi_rel_offset $17, SP_OFF+32
.cfi_rel_offset $18, SP_OFF+40
- blbs $3, strace
+#ifdef CONFIG_AUDITSYSCALL
+ lda $6, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
+ and $3, $6, $3
+#endif
+ bne $3, strace
beq $4, 1f
ldq $27, 0($5)
1: jsr $26, ($27), alpha_ni_syscall
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index 2a4a80ff4a20..86d835157b54 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -14,6 +14,7 @@
#include <linux/security.h>
#include <linux/signal.h>
#include <linux/tracehook.h>
+#include <linux/audit.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -316,15 +317,18 @@ long arch_ptrace(struct task_struct *child, long request,
asmlinkage unsigned long syscall_trace_enter(void)
{
unsigned long ret = 0;
+ struct pt_regs *regs = current_pt_regs();
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);
return ret ?: current_pt_regs()->r0;
}
asmlinkage void
syscall_trace_leave(void)
{
+ audit_syscall_exit(current_pt_regs());
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(current_pt_regs(), 0);
}
diff --git a/arch/alpha/lib/csum_partial_copy.c b/arch/alpha/lib/csum_partial_copy.c
index ff3c10721caf..5675dca8dbb1 100644
--- a/arch/alpha/lib/csum_partial_copy.c
+++ b/arch/alpha/lib/csum_partial_copy.c
@@ -378,6 +378,11 @@ csum_partial_copy_from_user(const void __user *src, void *dst, int len,
__wsum
csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
{
- return csum_partial_copy_from_user((__force const void __user *)src,
- dst, len, sum, NULL);
+ __wsum checksum;
+ mm_segment_t oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ checksum = csum_partial_copy_from_user((__force const void __user *)src,
+ dst, len, sum, NULL);
+ set_fs(oldfs);
+ return checksum;
}