diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2012-09-08 11:57:35 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-10 21:34:56 +0200 |
| commit | 9d2be9287107695708e6aae5105a8a518a6cb4d0 (patch) | |
| tree | 29a653d6354535842cae3c515211a5bf37da1f6b | |
| parent | xen/privcmd: Fix mmap batch ioctl error status copy back. (diff) | |
| download | linux-9d2be9287107695708e6aae5105a8a518a6cb4d0.tar.xz linux-9d2be9287107695708e6aae5105a8a518a6cb4d0.zip | |
xen/privcmd: return -EFAULT on error
__copy_to_user() returns the number of bytes remaining to be copied but
we want to return a negative error code here.
Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| -rw-r--r-- | drivers/xen/privcmd.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index 3b162c656205..ef6389580b8c 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -389,8 +389,11 @@ static long privcmd_ioctl_mmap_batch(void __user *udata, int version) state.err = err_array; ret = traverse_pages(m.num, sizeof(xen_pfn_t), &pagelist, mmap_return_errors_v1, &state); - } else if (version == 2) + } else if (version == 2) { ret = __copy_to_user(m.err, err_array, m.num * sizeof(int)); + if (ret) + ret = -EFAULT; + } /* If we have not had any EFAULT-like global errors then set the global * error to -ENOENT if necessary. */ |