[PATCH 4/5] all: wrap getdents64 syscall

From: Yury Norov
Date: Mon Jan 25 2016 - 11:59:12 EST


This system call may be handled by compat handler if
__ARCH_WANT_COMPAT_SYS_GETDENTS64 is defined. So we
should declare wrapper otherwise only.

Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx>
---
fs/readdir.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/fs/readdir.c b/fs/readdir.c
index ced6791..d34cc49 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -17,6 +17,7 @@
#include <linux/dirent.h>
#include <linux/security.h>
#include <linux/syscalls.h>
+#include <linux/compat.h>
#include <linux/unistd.h>

#include <asm/uaccess.h>
@@ -274,8 +275,13 @@ efault:
return -EFAULT;
}

+#ifndef __ARCH_WANT_COMPAT_SYS_GETDENTS64
+SYSCALL_DEFINE_WRAP3(getdents64, unsigned int, fd,
+ struct linux_dirent64 __user *, dirent, unsigned int, count)
+#else
SYSCALL_DEFINE3(getdents64, unsigned int, fd,
struct linux_dirent64 __user *, dirent, unsigned int, count)
+#endif
{
struct fd f;
struct linux_dirent64 __user * lastdirent;
--
2.5.0