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platform_kernel-5.15
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parisc: let probe_kernel_read() capture access to page zero 

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2013-10-09 23:47:03 +02:00
parent 2d8b22de6e
commit db080f9c53
1 changed files with 14 additions and 1 deletions
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15
arch/parisc/lib/memcpy.c
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@ -56,7 +56,7 @@
#ifdef __KERNEL__ #ifdef __KERNEL__
#include <linux/module.h> #include <linux/module.h>
#include <linux/compiler.h> #include <linux/compiler.h>
#include <asm/uaccess.h> #include <linux/uaccess.h>
#define s_space "%%sr1" #define s_space "%%sr1"
#define d_space "%%sr2" #define d_space "%%sr2"
#else #else
@ -524,4 +524,17 @@ EXPORT_SYMBOL(copy_to_user);
EXPORT_SYMBOL(copy_from_user); EXPORT_SYMBOL(copy_from_user);
EXPORT_SYMBOL(copy_in_user); EXPORT_SYMBOL(copy_in_user);
EXPORT_SYMBOL(memcpy); EXPORT_SYMBOL(memcpy);
long probe_kernel_read(void *dst, const void *src, size_t size)
{
unsigned long addr = (unsigned long)src;
if (size < 0 || addr < PAGE_SIZE)
return -EFAULT;
/* check for I/O space F_EXTEND(0xfff00000) access as well? */
return __probe_kernel_read(dst, src, size);
}
#endif #endif