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| author | Helge Deller <deller@gmx.de> | 2013-10-09 23:47:03 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2013-10-13 17:46:31 +0200 |
| commit | db080f9c530f78dad661257885a1893506077068 (patch) | |
| tree | 8bd6402f4e06a271937f2dd3ed70e9de7ffee081 /arch | |
| parent | parisc: optimize variable initialization in do_page_fault (diff) | |
| download | linux-db080f9c530f78dad661257885a1893506077068.tar.xz linux-db080f9c530f78dad661257885a1893506077068.zip | |
parisc: let probe_kernel_read() capture access to page zero
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/parisc/lib/memcpy.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c index ac4370b1ca40..b5507ec06b84 100644 --- a/arch/parisc/lib/memcpy.c +++ b/arch/parisc/lib/memcpy.c @@ -56,7 +56,7 @@ #ifdef __KERNEL__ #include <linux/module.h> #include <linux/compiler.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> #define s_space "%%sr1" #define d_space "%%sr2" #else @@ -524,4 +524,17 @@ EXPORT_SYMBOL(copy_to_user); EXPORT_SYMBOL(copy_from_user); EXPORT_SYMBOL(copy_in_user); 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 |