From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: david@fromorbit.com
Cc: xfs@oss.sgi.com
Subject: [PATCH] xfs: in _attrlist_by_handle, copy the cursor back to userspace
Date: Mon, 1 Aug 2016 20:56:51 -0700 [thread overview]
Message-ID: <20160802035651.GB8593@birch.djwong.org> (raw)
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>
---
fs/xfs/xfs_ioctl.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 2ef22db..30e69f5 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -390,6 +390,7 @@ 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;
@@ -422,6 +423,11 @@ 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;
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next reply other threads:[~2016-08-02 3:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-02 3:56 Darrick J. Wong [this message]
2016-08-02 12:25 ` [PATCH] xfs: in _attrlist_by_handle, copy the cursor back to userspace Christoph Hellwig
2016-08-02 15:40 ` Darrick J. Wong
2016-08-02 21:41 ` Dave Chinner
2016-08-02 22:47 ` Mark Tinguely
2016-08-02 23:57 ` Darrick J. Wong
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