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s390: switch to {get,put}_compat_sigset()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-09-04 12:24:17 -04:00
parent a5ae754a3d
commit c60a03fee0
1 changed files with 7 additions and 26 deletions
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33
arch/s390/kernel/compat_signal.c
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@ -49,19 +49,6 @@ typedef struct
struct ucontext32 uc;
} rt_sigframe32;
static inline void sigset_to_sigset32(unsigned long *set64,
compat_sigset_word *set32)
{
set32[0] = (compat_sigset_word) set64[0];
set32[1] = (compat_sigset_word)(set64[0] >> 32);
}
static inline void sigset32_to_sigset(compat_sigset_word *set32,
unsigned long *set64)
{
set64[0] = (unsigned long) set32[0] | ((unsigned long) set32[1] << 32);
}
int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
{
int err;
@ -293,12 +280,10 @@ COMPAT_SYSCALL_DEFINE0(sigreturn)
{
struct pt_regs *regs = task_pt_regs(current);
sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
compat_sigset_t cset;
sigset_t set;
if (__copy_from_user(&cset.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32))
if (get_compat_sigset(&set, (compat_sigset_t __user *)frame->sc.oldmask))
goto badframe;
sigset32_to_sigset(cset.sig, set.sig);
set_current_blocked(&set);
save_fpu_regs();
if (restore_sigregs32(regs, &frame->sregs))
@ -316,12 +301,10 @@ COMPAT_SYSCALL_DEFINE0(rt_sigreturn)
{
struct pt_regs *regs = task_pt_regs(current);
rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
compat_sigset_t cset;
sigset_t set;
if (__copy_from_user(&cset, &frame->uc.uc_sigmask, sizeof(cset)))
if (get_compat_sigset(&set, &frame->uc.uc_sigmask))
goto badframe;
sigset32_to_sigset(cset.sig, set.sig);
set_current_blocked(&set);
if (compat_restore_altstack(&frame->uc.uc_stack))
goto badframe;
@ -371,7 +354,6 @@ static int setup_frame32(struct ksignal *ksig, sigset_t *set,
{
int sig = ksig->sig;
sigframe32 __user *frame;
struct sigcontext32 sc;
unsigned long restorer;
size_t frame_size;
@ -393,9 +375,10 @@ static int setup_frame32(struct ksignal *ksig, sigset_t *set,
return -EFAULT;
/* Create struct sigcontext32 on the signal stack */
sigset_to_sigset32(set->sig, sc.oldmask);
sc.sregs = (__u32)(unsigned long __force) &frame->sregs;
if (__copy_to_user(&frame->sc, &sc, sizeof(frame->sc)))
if (put_compat_sigset((compat_sigset_t __user *)frame->sc.oldmask,
set, sizeof(compat_sigset_t)))
return -EFAULT;
if (__put_user(ptr_to_compat(&frame->sc), &frame->sc.sregs))
return -EFAULT;
/* Store registers needed to create the signal frame */
@ -454,7 +437,6 @@ static int setup_frame32(struct ksignal *ksig, sigset_t *set,
static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs)
{
compat_sigset_t cset;
rt_sigframe32 __user *frame;
unsigned long restorer;
size_t frame_size;
@ -501,12 +483,11 @@ static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set,
store_sigregs();
/* Create ucontext on the signal stack. */
sigset_to_sigset32(set->sig, cset.sig);
if (__put_user(uc_flags, &frame->uc.uc_flags) ||
__put_user(0, &frame->uc.uc_link) ||
__compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]) ||
save_sigregs32(regs, &frame->uc.uc_mcontext) ||
__copy_to_user(&frame->uc.uc_sigmask, &cset, sizeof(cset)) ||
put_compat_sigset(&frame->uc.uc_sigmask, set, sizeof(compat_sigset_t)) ||
save_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext))
return -EFAULT;