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authorSage Weil <sage@inktank.com>2012-09-24 21:04:57 -0700
committerAlex Elder <elder@inktank.com>2012-10-03 10:51:17 -0500
commit457712a0bc5389b75d2c93840a684fd77df2aabb (patch)
tree465703170a567b747a1e642a6a80332e0bdbf1f1 /fs/ceph
parent6cae3717cddaf8e5e96e304733dca66e40d56f89 (diff)
ceph: return EIO on invalid layout on GET_DATALOC ioctl
If the user calls GET_DATALOC on a file with an invalid (e.g., zeroed) layout, return EIO to userland. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/ioctl.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index 1396ceb4679..36549a46e31 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -187,14 +187,18 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
u64 tmp;
struct ceph_object_layout ol;
struct ceph_pg pgid;
+ int r;
/* copy and validate */
if (copy_from_user(&dl, arg, sizeof(dl)))
return -EFAULT;
down_read(&osdc->map_sem);
- ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
- &dl.object_no, &dl.object_offset, &olen);
+ r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
+ &dl.object_no, &dl.object_offset,
+ &olen);
+ if (r < 0)
+ return -EIO;
dl.file_offset -= dl.object_offset;
dl.object_size = ceph_file_layout_object_size(ci->i_layout);
dl.block_size = ceph_file_layout_su(ci->i_layout);