mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-22 02:24:57 +08:00
99399545d6
Fix mmap2 behaviour which incorrectly works with pgoff not in 4k units. Reported-by: Rich Felker <dalias@aerifal.cx> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
|
|
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2007-2009 PetaLogix
|
|
* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
|
|
*
|
|
* Copyright (C) 2006 Atmark Techno, Inc.
|
|
* Yasushi SHOJI <yashi@atmark-techno.com>
|
|
* Tetsuya OHKAWA <tetsuya@atmark-techno.com>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/export.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/sys.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/file.h>
|
|
#include <linux/err.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/semaphore.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/syscalls.h>
|
|
|
|
SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
|
|
unsigned long, prot, unsigned long, flags, unsigned long, fd,
|
|
off_t, pgoff)
|
|
{
|
|
if (pgoff & ~PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
|
|
}
|
|
|
|
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
|
|
unsigned long, prot, unsigned long, flags, unsigned long, fd,
|
|
unsigned long, pgoff)
|
|
{
|
|
if (pgoff & (~PAGE_MASK >> 12))
|
|
return -EINVAL;
|
|
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd,
|
|
pgoff >> (PAGE_SHIFT - 12));
|
|
}
|