diff options
Diffstat (limited to 'arch/arc/include/asm/futex.h')
| -rw-r--r-- | arch/arc/include/asm/futex.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/arc/include/asm/futex.h b/arch/arc/include/asm/futex.h index c29c3fae6854..607d1c16d4dd 100644 --- a/arch/arc/include/asm/futex.h +++ b/arch/arc/include/asm/futex.h @@ -1,10 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * * Vineetg: August 2010: From Android kernel work */ @@ -78,10 +75,12 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, { int oldval = 0, ret; + if (!access_ok(uaddr, sizeof(u32))) + return -EFAULT; + #ifndef CONFIG_ARC_HAS_LLSC preempt_disable(); /* to guarantee atomic r-m-w of futex op */ #endif - pagefault_disable(); switch (op) { case FUTEX_OP_SET: @@ -104,7 +103,6 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, ret = -ENOSYS; } - pagefault_enable(); #ifndef CONFIG_ARC_HAS_LLSC preempt_enable(); #endif |