Messages in this thread Patch in this message | | | From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 48/70] ovl: copy new uid/gid into overlayfs runtime inode | Date | Wed, 16 Mar 2016 13:05:41 -0700 |
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v3.19.8-ckt17 -stable review patch. If anyone has any objections, please let me know.
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From: Konstantin Khlebnikov <koct9i@gmail.com>
commit b81de061fa59f17d2730aabb1b84419ef3913810 upstream.
Overlayfs must update uid/gid after chown, otherwise functions like inode_owner_or_capable() will check user against stale uid. Catched by xfstests generic/087, it chowns file and calls utimes.
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com> Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- fs/overlayfs/inode.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 8525e67..e7a505c 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -55,6 +55,8 @@ int ovl_setattr(struct dentry *dentry, struct iattr *attr) mutex_lock(&upperdentry->d_inode->i_mutex); err = notify_change(upperdentry, attr, NULL); + if (!err) + ovl_copyattr(upperdentry->d_inode, dentry->d_inode); mutex_unlock(&upperdentry->d_inode->i_mutex); } ovl_drop_write(dentry); -- 2.7.0
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