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authorDarrick J. Wong <darrick.wong@oracle.com>2016-08-03 10:58:53 +1000
committerDave Chinner <david@fromorbit.com>2016-08-03 10:58:53 +1000
commit0facef7fb053be4353c0a48c2f48c9dbee91cb19 (patch)
treec94892ed9bf47a98a5c0f2d9deff4cdc6f4d375a /fs/xfs/xfs_ioctl.c
parentf2bdfda9a1c668539bc85baf5625f6f14bc510b1 (diff)
xfs: in _attrlist_by_handle, copy the cursor back to userspace
When we're iterating inode xattrs by handle, we have to copy the cursor back to userspace so that a subsequent invocation actually retrieves subsequent contents. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_ioctl.c')
-rw-r--r--fs/xfs/xfs_ioctl.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 9a7c87809d3b..cf46658392ce 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -387,6 +387,7 @@ xfs_attrlist_by_handle(
{
int error = -ENOMEM;
attrlist_cursor_kern_t *cursor;
+ struct xfs_fsop_attrlist_handlereq __user *p = arg;
xfs_fsop_attrlist_handlereq_t al_hreq;
struct dentry *dentry;
char *kbuf;
@@ -419,6 +420,11 @@ xfs_attrlist_by_handle(
if (error)
goto out_kfree;
+ if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
+ error = -EFAULT;
+ goto out_kfree;
+ }
+
if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
error = -EFAULT;