Messages in this thread | | | Date | Thu, 18 Aug 2011 06:42:13 -0400 | From | Jeff Layton <> | Subject | Re: Q: cifs, freeing volume_info->UNCip |
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On Tue, 16 Aug 2011 08:22:17 +0900 "J. R. Okajima" <hooanon05@yahoo.co.jp> wrote:
> > Hello, > > CIFS cleanup_volume_info_contents() looks like having a memory > corruption problem. > When UNCip is set to "&vol->UNC[2]" in cifs_parse_mount_options(), it > should not be kfree()-ed in cleanup_volume_info_contents(). > > If it is correct and the code in mainline is not fixed yet, then here is > a patch. > > diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c > index ccc1afa..e0ea721 100644 > --- a/fs/cifs/connect.c > +++ b/fs/cifs/connect.c > @@ -2838,7 +2838,8 @@ cleanup_volume_info_contents(struct smb_vol *volume_info) > kfree(volume_info->username); > kzfree(volume_info->password); > kfree(volume_info->UNC); > - kfree(volume_info->UNCip); > + if (volume_info->UNCip != volume_info->UNC + 2) > + kfree(volume_info->UNCip); > kfree(volume_info->domainname); > kfree(volume_info->iocharset); > kfree(volume_info->prepath); > >
Also, this patch should obviously go to stable too.
-- Jeff Layton <jlayton@redhat.com>
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