#include <linux/nsproxy.h>
#include <linux/user_namespace.h>
#include <linux/uprobes.h>
+#include <linux/compat.h>
#define CREATE_TRACE_POINTS
#include <trace/events/signal.h>
*/
void set_current_blocked(sigset_t *newset)
{
- struct task_struct *tsk = current;
sigdelsetmask(newset, sigmask(SIGKILL) | sigmask(SIGSTOP));
- spin_lock_irq(&tsk->sighand->siglock);
- __set_task_blocked(tsk, newset);
- spin_unlock_irq(&tsk->sighand->siglock);
+ __set_current_blocked(newset);
}
void __set_current_blocked(const sigset_t *newset)
return 0;
}
+#ifdef CONFIG_COMPAT
+#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPROCMASK
+COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset,
+ compat_sigset_t __user *, oset, compat_size_t, sigsetsize)
+{
+#ifdef __BIG_ENDIAN
+ sigset_t old_set = current->blocked;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(sigset_t))
+ return -EINVAL;
+
+ if (nset) {
+ compat_sigset_t new32;
+ sigset_t new_set;
+ int error;
+ if (copy_from_user(&new32, nset, sizeof(compat_sigset_t)))
+ return -EFAULT;
+
+ sigset_from_compat(&new_set, &new32);
+ sigdelsetmask(&new_set, sigmask(SIGKILL)|sigmask(SIGSTOP));
+
+ error = sigprocmask(how, &new_set, NULL);
+ if (error)
+ return error;
+ }
+ if (oset) {
+ compat_sigset_t old32;
+ sigset_to_compat(&old32, &old_set);
+ if (copy_to_user(oset, &old_set, sizeof(sigset_t)))
+ return -EFAULT;
+ }
+ return 0;
+#else
+ return sys_rt_sigprocmask(how, (sigset_t __user *)nset,
+ (sigset_t __user *)oset, sigsetsize);
+#endif
+}
+#endif
+#endif
+
long do_sigpending(void __user *set, unsigned long sigsetsize)
{
long error = -EINVAL;
out:
return error;
}
+#ifdef CONFIG_GENERIC_SIGALTSTACK
+SYSCALL_DEFINE2(sigaltstack,const stack_t __user *,uss, stack_t __user *,uoss)
+{
+ return do_sigaltstack(uss, uoss, current_user_stack_pointer());
+}
+#endif
+
+int restore_altstack(const stack_t __user *uss)
+{
+ int err = do_sigaltstack(uss, NULL, current_user_stack_pointer());
+ /* squash all but EFAULT for now */
+ return err == -EFAULT ? err : 0;
+}
+
+int __save_altstack(stack_t __user *uss, unsigned long sp)
+{
+ struct task_struct *t = current;
+ return __put_user((void __user *)t->sas_ss_sp, &uss->ss_sp) |
+ __put_user(sas_ss_flags(sp), &uss->ss_flags) |
+ __put_user(t->sas_ss_size, &uss->ss_size);
+}
+
+#ifdef CONFIG_COMPAT
+#ifdef CONFIG_GENERIC_SIGALTSTACK
+COMPAT_SYSCALL_DEFINE2(sigaltstack,
+ const compat_stack_t __user *, uss_ptr,
+ compat_stack_t __user *, uoss_ptr)
+{
+ stack_t uss, uoss;
+ int ret;
+ mm_segment_t seg;
+
+ if (uss_ptr) {
+ compat_stack_t uss32;
+
+ memset(&uss, 0, sizeof(stack_t));
+ if (copy_from_user(&uss32, uss_ptr, sizeof(compat_stack_t)))
+ return -EFAULT;
+ uss.ss_sp = compat_ptr(uss32.ss_sp);
+ uss.ss_flags = uss32.ss_flags;
+ uss.ss_size = uss32.ss_size;
+ }
+ seg = get_fs();
+ set_fs(KERNEL_DS);
+ ret = do_sigaltstack((stack_t __force __user *) (uss_ptr ? &uss : NULL),
+ (stack_t __force __user *) &uoss,
+ compat_user_stack_pointer());
+ set_fs(seg);
+ if (ret >= 0 && uoss_ptr) {
+ if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(compat_stack_t)) ||
+ __put_user(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp) ||
+ __put_user(uoss.ss_flags, &uoss_ptr->ss_flags) ||
+ __put_user(uoss.ss_size, &uoss_ptr->ss_size))
+ ret = -EFAULT;
+ }
+ return ret;
+}
+
+int compat_restore_altstack(const compat_stack_t __user *uss)
+{
+ int err = compat_sys_sigaltstack(uss, NULL);
+ /* squash all but -EFAULT for now */
+ return err == -EFAULT ? err : 0;
+}
+
+int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp)
+{
+ struct task_struct *t = current;
+ return __put_user(ptr_to_compat((void __user *)t->sas_ss_sp), &uss->ss_sp) |
+ __put_user(sas_ss_flags(sp), &uss->ss_flags) |
+ __put_user(t->sas_ss_size, &uss->ss_size);
+}
+#endif
+#endif
#ifdef __ARCH_WANT_SYS_SIGPENDING
if (nset) {
if (copy_from_user(&new_set, nset, sizeof(*nset)))
return -EFAULT;
- new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP));
new_blocked = current->blocked;
return -EINVAL;
}
- __set_current_blocked(&new_blocked);
+ set_current_blocked(&new_blocked);
}
if (oset) {
}
#endif /* __ARCH_WANT_SYS_SIGPROCMASK */
-#ifdef __ARCH_WANT_SYS_RT_SIGACTION
+#ifndef CONFIG_ODD_RT_SIGACTION
/**
* sys_rt_sigaction - alter an action taken by a process
* @sig: signal to be sent
out:
return ret;
}
-#endif /* __ARCH_WANT_SYS_RT_SIGACTION */
+#endif /* !CONFIG_ODD_RT_SIGACTION */
#ifdef __ARCH_WANT_SYS_SGETMASK
int old = current->blocked.sig[0];
sigset_t newset;
+ siginitset(&newset, newmask);
set_current_blocked(&newset);
return old;
return -EFAULT;
return sigsuspend(&newset);
}
-#endif /* __ARCH_WANT_SYS_RT_SIGSUSPEND */
+
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_size_t, sigsetsize)
+{
+#ifdef __BIG_ENDIAN
+ sigset_t newset;
+ compat_sigset_t newset32;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(sigset_t))
+ return -EINVAL;
+
+ if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
+ return -EFAULT;
+ sigset_from_compat(&newset, &newset32);
+ return sigsuspend(&newset);
+#else
+ /* on little-endian bitmaps don't care about granularity */
+ return sys_rt_sigsuspend((sigset_t __user *)unewset, sigsetsize);
+#endif
+}
+#endif
+#endif
__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma)
{
projects / firefly-linux-kernel-4.4.55.git / blobdiff