diff options
Diffstat (limited to 'arch/um/kernel/tt/uaccess_user.c')
| -rw-r--r-- | arch/um/kernel/tt/uaccess_user.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/um/kernel/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c index f01475512ec..8c220f054b6 100644 --- a/arch/um/kernel/tt/uaccess_user.c +++ b/arch/um/kernel/tt/uaccess_user.c @@ -22,8 +22,15 @@ int __do_copy_from_user(void *to, const void *from, int n, __do_copy, &faulted); TASK_REGS(get_current())->tt = save; - if(!faulted) return(0); - else return(n - (fault - (unsigned long) from)); + if(!faulted) + return 0; + else if (fault) + return n - (fault - (unsigned long) from); + else + /* In case of a general protection fault, we don't have the + * fault address, so NULL is used instead. Pretend we didn't + * copy anything. */ + return n; } static void __do_strncpy(void *dst, const void *src, int count) |