Commit 63379c1 parisc: implement full version of access_ok() was incomplete and
broke userspace. Fix it by checking if we really write to userspace.
Signed-off-by: Helge Deller <deller@xxxxxx>
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index 63f4dd0..228fecb 100644
--- a/arch/parisc/include/asm/uaccess.h
+++ b/arch/parisc/include/asm/uaccess.h
@@ -45,7 +45,11 @@ static inline int __range_not_ok(unsigned long addr, unsigned long size,
unsigned long limit)
{
unsigned long __newaddr = addr + size;
- return (__newaddr < addr || __newaddr > limit || size > limit);
+
+ if (segment_eq(get_fs(), KERNEL_DS))
+ return 0;
+
+ return (addr < PAGE_SIZE || __newaddr > limit || size > limit);
}
/**
--
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