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authorAl Viro <viro@zeniv.linux.org.uk>2017-09-03 21:45:17 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-09-19 17:56:01 -0400
commit3968cf623892d710e651070243fd16af312a9797 (patch)
tree273164e59b53074a9330aa12d2764d0fc28ea245 /kernel/compat.c
parentb8e8e1aa9f14110da180569908bbe538c9e9dc63 (diff)
downloadlinux-3968cf623892d710e651070243fd16af312a9797.tar.bz2
get_compat_sigset()
similar to put_compat_sigset() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/compat.c')
-rw-r--r--kernel/compat.c23
1 files changed, 16 insertions, 7 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index d43b18031116..a46a4a40bb8b 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -467,17 +467,26 @@ Efault:
return -EFAULT;
}
-void
-sigset_from_compat(sigset_t *set, const compat_sigset_t *compat)
+int
+get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat)
{
+#ifdef __BIG_ENDIAN
+ compat_sigset_t v;
+ if (copy_from_user(&v, compat, sizeof(compat_sigset_t)))
+ return -EFAULT;
switch (_NSIG_WORDS) {
- case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 );
- case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 );
- case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 );
- case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 );
+ case 4: set->sig[3] = v.sig[6] | (((long)v.sig[7]) << 32 );
+ case 3: set->sig[2] = v.sig[4] | (((long)v.sig[5]) << 32 );
+ case 2: set->sig[1] = v.sig[2] | (((long)v.sig[3]) << 32 );
+ case 1: set->sig[0] = v.sig[0] | (((long)v.sig[1]) << 32 );
}
+#else
+ if (copy_from_user(set, compat, sizeof(compat_sigset_t)))
+ return -EFAULT;
+#endif
+ return 0;
}
-EXPORT_SYMBOL_GPL(sigset_from_compat);
+EXPORT_SYMBOL_GPL(get_compat_sigset);
int
put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,