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parisc: Add hardened usercopy feature

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Add hardened usercopy checks to parisc architecture and clean up
indenting.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller
2016-10-06 09:07:30 +02:00
parent f39cce654f
commit 9e91db6b4a
3 changed files with 41 additions and 19 deletions
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11
arch/parisc/lib/memcpy.c
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@@ -489,20 +489,23 @@ static unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
}
#ifdef __KERNEL__
unsigned long copy_to_user(void __user *dst, const void *src, unsigned long len)
unsigned long __copy_to_user(void __user *dst, const void *src,
unsigned long len)
{
mtsp(get_kernel_space(), 1);
mtsp(get_user_space(), 2);
return pa_memcpy((void __force *)dst, src, len);
}
EXPORT_SYMBOL(__copy_to_user);
EXPORT_SYMBOL(__copy_from_user);
unsigned long __copy_from_user(void *dst, const void __user *src, unsigned long len)
unsigned long __copy_from_user(void *dst, const void __user *src,
unsigned long len)
{
mtsp(get_user_space(), 1);
mtsp(get_kernel_space(), 2);
return pa_memcpy(dst, (void __force *)src, len);
}
EXPORT_SYMBOL(__copy_from_user);
unsigned long copy_in_user(void __user *dst, const void __user *src, unsigned long len)
{
@@ -520,8 +523,6 @@ void * memcpy(void * dst,const void *src, size_t count)
return dst;
}
EXPORT_SYMBOL(copy_to_user);
EXPORT_SYMBOL(copy_from_user);
EXPORT_SYMBOL(copy_in_user);
EXPORT_SYMBOL(memcpy);