From a08971e9488d12a10a46eb433612229767b61fd5 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 16 Feb 2020 10:17:27 -0500 Subject: futex: arch_futex_atomic_op_inuser() calling conventions change Move access_ok() in and pagefault_enable()/pagefault_disable() out. Mechanical conversion only - some instances don't really need a separate access_ok() at all (e.g. the ones only using get_user()/put_user(), or architectures where access_ok() is always true); we'll deal with that in followups. Signed-off-by: Al Viro --- include/asm-generic/futex.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/asm-generic/futex.h') diff --git a/include/asm-generic/futex.h b/include/asm-generic/futex.h index 02970b11f71f..3eab7ba912fc 100644 --- a/include/asm-generic/futex.h +++ b/include/asm-generic/futex.h @@ -33,8 +33,9 @@ arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval, u32 __user *uaddr) int oldval, ret; u32 tmp; + if (!access_ok(uaddr, sizeof(u32))) + return -EFAULT; preempt_disable(); - pagefault_disable(); ret = -EFAULT; if (unlikely(get_user(oldval, uaddr) != 0)) @@ -67,7 +68,6 @@ arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval, u32 __user *uaddr) ret = -EFAULT; out_pagefault_enable: - pagefault_enable(); preempt_enable(); if (ret == 0) -- cgit v1.2.3