diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-12-16 18:33:49 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-16 18:33:49 +0100 |
| commit | ee1156c11a1121e118b0a7f2dec240f0d421b1fd (patch) | |
| tree | b8771cc5a9758af9d7410fc519227c036c222130 /arch/sparc/include/asm/uaccess_32.h | |
| parent | b9f8fcd55bbdb037e5332dbdb7b494f0b70861ac (diff) | |
| parent | 8bea8672edfca7ec5f661cafb218f1205863b343 (diff) | |
Merge branch 'linus' into sched/urgent
Conflicts:
kernel/sched_idletask.c
Merge reason: resolve the conflicts, pick up latest changes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 8303ac48103..489d2ba92bc 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 |