tree 6629c15380fe2db238fa078e912f4cf393708161
parent b0105eaefa7cce8f4a941d0fc6354b250d30e745
author Tyler Hicks <tyhicks@linux.vnet.ibm.com> 1250057214 -0500
committer Tyler Hicks <tyhicks@linux.vnet.ibm.com> 1253715032 -0500

eCryptfs: Check for O_RDONLY lower inodes when opening lower files

If the lower inode is read-only, don't attempt to open the lower file
read/write and don't hand off the open request to the privileged
eCryptfs kthread for opening it read/write.  Instead, only try an
unprivileged, read-only open of the file and give up if that fails.
This patch fixes an oops when eCryptfs is mounted on top of a read-only
mount.

Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Eric Sandeen <esandeen@redhat.com>
Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: ecryptfs-devel@lists.launchpad.net
Cc: stable <stable@kernel.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>