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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-01-22 08:55:25 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-01-22 08:55:25 +0100 |
| commit | 7755726fe90a8b253659756e6de68c1a55aa427f (patch) | |
| tree | a3523fa77e07854db3b8089e3066a55ea997060c /arch/sparc/include/asm/uaccess_32.h | |
| parent | Input: sh_keysc - add mode 4 and mode 5 support (diff) | |
| parent | Linux 2.6.33-rc5 (diff) | |
| download | linux-7755726fe90a8b253659756e6de68c1a55aa427f.tar.xz linux-7755726fe90a8b253659756e6de68c1a55aa427f.zip | |
Merge commit 'v2.6.33-rc5' into next
Diffstat (limited to 'arch/sparc/include/asm/uaccess_32.h')
| -rw-r--r-- | arch/sparc/include/asm/uaccess_32.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h index 8303ac481034..489d2ba92bcb 100644 --- a/arch/sparc/include/asm/uaccess_32.h +++ b/arch/sparc/include/asm/uaccess_32.h @@ -260,8 +260,23 @@ static inline unsigned long __copy_to_user(void __user *to, const void *from, un return __copy_user(to, (__force void __user *) from, n); } +extern void copy_from_user_overflow(void) +#ifdef CONFIG_DEBUG_STRICT_USER_COPY_CHECKS + __compiletime_error("copy_from_user() buffer size is not provably correct") +#else + __compiletime_warning("copy_from_user() buffer size is not provably correct") +#endif +; + static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n) { + int sz = __compiletime_object_size(to); + + if (unlikely(sz != -1 && sz < n)) { + copy_from_user_overflow(); + return -EFAULT; + } + if (n && __access_ok((unsigned long) from, n)) return __copy_user((__force void __user *) to, from, n); else |