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Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull compat and uaccess updates from Al Viro:

 - {get,put}_compat_sigset() series

 - assorted compat ioctl stuff

 - more set_fs() elimination

 - a few more timespec64 conversions

 - several removals of pointless access_ok() in places where it was
   followed only by non-__ variants of primitives

* 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (24 commits)
  coredump: call do_unlinkat directly instead of sys_unlink
  fs: expose do_unlinkat for built-in callers
  ext4: take handling of EXT4_IOC_GROUP_ADD into a helper, get rid of set_fs()
  ipmi: get rid of pointless access_ok()
  pi433: sanitize ioctl
  cxlflash: get rid of pointless access_ok()
  mtdchar: get rid of pointless access_ok()
  r128: switch compat ioctls to drm_ioctl_kernel()
  selection: get rid of field-by-field copyin
  VT_RESIZEX: get rid of field-by-field copyin
  i2c compat ioctls: move to ->compat_ioctl()
  sched_rr_get_interval(): move compat to native, get rid of set_fs()
  mips: switch to {get,put}_compat_sigset()
  sparc: switch to {get,put}_compat_sigset()
  s390: switch to {get,put}_compat_sigset()
  ppc: switch to {get,put}_compat_sigset()
  parisc: switch to {get,put}_compat_sigset()
  get_compat_sigset()
  get rid of {get,put}_compat_itimerspec()
  io_getevents: Use timespec64 to represent timeouts
  ...
This commit is contained in:
Linus Torvalds
2017-11-17 11:54:55 -08:00
parent 06ede5f608 96271654f5
commit 93f30c73ec
32 changed files with 506 additions and 819 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
arch/s390/kernel/compat_signal.c
View File

@@ -50,19 +50,6 @@ 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;
@@ -294,12 +281,10 @@ 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))
@@ -317,12 +302,10 @@ 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;
@@ -372,7 +355,6 @@ 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;
@@ -394,9 +376,10 @@ 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 */
@@ -455,7 +438,6 @@ 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;
@@ -502,12 +484,11 @@ 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;