[PATCH] ceph: check negative offsets on ceph_llseek()

[Luis Henriques]

When a user requests SEEK_HOLE or SEEK_DATA with a negative offset
ceph_llseek should return -ENXIO.  Currently -EINVAL is being returned for
SEEK_DATA and 0 for SEEK_HOLE.

Signed-off-by: Luis Henriques <lhenriq...@suse.com>
---
 fs/ceph/file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 3d48c415f3cb..e1912e67843f 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1481,13 +1481,13 @@ static loff_t ceph_llseek(struct file *file, loff_t 
offset, int whence)
                offset += file->f_pos;
                break;
        case SEEK_DATA:
-               if (offset >= i_size) {
+               if (offset < 0 || offset >= i_size) {
                        ret = -ENXIO;
                        goto out;
                }
                break;
        case SEEK_HOLE:
-               if (offset >= i_size) {
+               if (offset < 0 || offset >= i_size) {
                        ret = -ENXIO;
                        goto out;
                }