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Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index dfd125798791..5ad4248b0cd8 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -633,7 +633,8 @@ ssize_t do_loop_readv_writev(struct file *filp, struct iovec *iov,
ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
unsigned long nr_segs, unsigned long fast_segs,
struct iovec *fast_pointer,
- struct iovec **ret_pointer)
+ struct iovec **ret_pointer,
+ int check_access)
{
unsigned long seg;
ssize_t ret;
@@ -689,7 +690,8 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
ret = -EINVAL;
goto out;
}
- if (unlikely(!access_ok(vrfy_dir(type), buf, len))) {
+ if (check_access
+ && unlikely(!access_ok(vrfy_dir(type), buf, len))) {
ret = -EFAULT;
goto out;
}
@@ -721,7 +723,7 @@ static ssize_t do_readv_writev(int type, struct file *file,
}
ret = rw_copy_check_uvector(type, uvector, nr_segs,
- ARRAY_SIZE(iovstack), iovstack, &iov);
+ ARRAY_SIZE(iovstack), iovstack, &iov, 1);
if (ret <= 0)
goto out;