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seccomp: Add a seccomp_data parameter secure_computing()

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Currently, if arch code wants to supply seccomp_data directly to
seccomp (which is generally much faster than having seccomp do it
using the syscall_get_xyz() API), it has to use the two-phase
seccomp hooks. Add it to the easy hooks, too.

Cc: linux-arch@vger.kernel.org
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Andy Lutomirski 2016-05-27 12:57:02 -07:00 committed by Kees Cook
parent 58d0a862f5
commit 2f275de5d1
11 changed files with 15 additions and 15 deletions
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2
arch/arm/kernel/ptrace.c
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@ -934,7 +934,7 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs, int scno)
/* Do the secure computing check first; failures should be fast. */
#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
if (secure_computing() == -1)
if (secure_computing(NULL) == -1)
return -1;
#else
/* XXX: remove this once OABI gets fixed */

2
arch/arm64/kernel/ptrace.c
View File

@ -1247,7 +1247,7 @@ static void tracehook_report_syscall(struct pt_regs *regs,
asmlinkage int syscall_trace_enter(struct pt_regs *regs)
{
/* Do the secure computing check first; failures should be fast. */
if (secure_computing() == -1)
if (secure_computing(NULL) == -1)
return -1;
if (test_thread_flag(TIF_SYSCALL_TRACE))

2
arch/mips/kernel/ptrace.c
View File

@ -893,7 +893,7 @@ asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall)
current_thread_info()->syscall = syscall;
if (secure_computing() == -1)
if (secure_computing(NULL) == -1)
return -1;
if (test_thread_flag(TIF_SYSCALL_TRACE) &&

2
arch/parisc/kernel/ptrace.c
View File

@ -312,7 +312,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
long do_syscall_trace_enter(struct pt_regs *regs)
{
/* Do the secure computing check first. */
if (secure_computing() == -1)
if (secure_computing(NULL) == -1)
return -1;
if (test_thread_flag(TIF_SYSCALL_TRACE) &&

2
arch/powerpc/kernel/ptrace.c
View File

@ -1783,7 +1783,7 @@ static int do_seccomp(struct pt_regs *regs)
* have already loaded -ENOSYS into r3, or seccomp has put
* something else in r3 (via SECCOMP_RET_ERRNO/TRACE).
*/
if (__secure_computing())
if (__secure_computing(NULL))
return -1;
/*

2
arch/s390/kernel/ptrace.c
View File

@ -824,7 +824,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
long ret = 0;
/* Do the secure computing check first. */
if (secure_computing()) {
if (secure_computing(NULL)) {
/* seccomp failures shouldn't expose any additional code. */
ret = -1;
goto out;

2
arch/tile/kernel/ptrace.c
View File

@ -255,7 +255,7 @@ int do_syscall_trace_enter(struct pt_regs *regs)
{
u32 work = ACCESS_ONCE(current_thread_info()->flags);
if (secure_computing() == -1)
if (secure_computing(NULL) == -1)
return -1;
if (work & _TIF_SYSCALL_TRACE) {

2
arch/um/kernel/skas/syscall.c
View File

@ -21,7 +21,7 @@ void handle_syscall(struct uml_pt_regs *r)
PT_REGS_SET_SYSCALL_RETURN(regs, -ENOSYS);
/* Do the secure computing check first; failures should be fast. */
if (secure_computing() == -1)
if (secure_computing(NULL) == -1)
return;
if (syscall_trace_enter(regs))

2
arch/x86/entry/vsyscall/vsyscall_64.c
View File

@ -207,7 +207,7 @@ bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
*/
regs->orig_ax = syscall_nr;
regs->ax = -ENOSYS;
tmp = secure_computing();
tmp = secure_computing(NULL);
if ((!tmp && regs->orig_ax != syscall_nr) || regs->ip != address) {
warn_bad_vsyscall(KERN_DEBUG, regs,
"seccomp tried to change syscall nr or ip");

8
include/linux/seccomp.h
View File

@ -28,11 +28,11 @@ struct seccomp {
};
#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
extern int __secure_computing(void);
static inline int secure_computing(void)
extern int __secure_computing(const struct seccomp_data *sd);
static inline int secure_computing(const struct seccomp_data *sd)
{
if (unlikely(test_thread_flag(TIF_SECCOMP)))
return __secure_computing();
return __secure_computing(sd);
return 0;
}
@ -61,7 +61,7 @@ struct seccomp { };
struct seccomp_filter { };
#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
static inline int secure_computing(void) { return 0; }
static inline int secure_computing(struct seccomp_data *sd) { return 0; }
#else
static inline void secure_computing_strict(int this_syscall) { return; }
#endif

4
kernel/seccomp.c
View File

@ -554,9 +554,9 @@ void secure_computing_strict(int this_syscall)
BUG();
}
#else
int __secure_computing(void)
int __secure_computing(const struct seccomp_data *sd)
{
u32 phase1_result = seccomp_phase1(NULL);
u32 phase1_result = seccomp_phase1(sd);
if (likely(phase1_result == SECCOMP_PHASE1_OK))
return 0;