From: "Randy.Dunlap" <rddunlap@osdl.org>
From: Eugene TEO <eugeneteo@eugeneteo.net>
---
arch/i386/kernel/i387.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff -puN arch/i386/kernel/i387.c~janitor-09-i387-usercopy-check arch/i386/kernel/i387.c
--- 25/arch/i386/kernel/i387.c~janitor-09-i387-usercopy-check 2004-01-20 19:31:03.000000000 -0800
+++ 25-akpm/arch/i386/kernel/i387.c 2004-01-20 19:32:57.000000000 -0800
@@ -451,15 +451,18 @@ int get_fpxregs( struct user_fxsr_struct
int set_fpxregs( struct task_struct *tsk, struct user_fxsr_struct __user *buf )
{
+ int ret = 0;
+
if ( cpu_has_fxsr ) {
- __copy_from_user( &tsk->thread.i387.fxsave, buf,
- sizeof(struct user_fxsr_struct) );
+ if (__copy_from_user( &tsk->thread.i387.fxsave, buf,
+ sizeof(struct user_fxsr_struct) ))
+ ret = -EFAULT;
/* mxcsr bit 6 and 31-16 must be zero for security reasons */
tsk->thread.i387.fxsave.mxcsr &= 0xffbf;
- return 0;
} else {
- return -EIO;
+ ret = -EIO;
}
+ return ret;
}
/*
_