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| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-08-12 01:06:54 -0500 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-09-23 09:10:32 -0500 |
| commit | ac22ba23b659e34a5961aec8c945608e471b0d5b (patch) | |
| tree | 6629c15380fe2db238fa078e912f4cf393708161 /fs/ecryptfs/main.c | |
| parent | b0105eaefa7cce8f4a941d0fc6354b250d30e745 (diff) | |
| download | linux-stable-ac22ba23b659e34a5961aec8c945608e471b0d5b.tar.gz linux-stable-ac22ba23b659e34a5961aec8c945608e471b0d5b.tar.bz2 linux-stable-ac22ba23b659e34a5961aec8c945608e471b0d5b.zip | |
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>
Diffstat (limited to 'fs/ecryptfs/main.c')
| -rw-r--r-- | fs/ecryptfs/main.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index 9f0aa9883c28..101fe4c7b1ee 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -129,11 +129,10 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry) lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); rc = ecryptfs_privileged_open(&inode_info->lower_file, lower_dentry, lower_mnt, cred); - if (rc || IS_ERR(inode_info->lower_file)) { + if (rc) { printk(KERN_ERR "Error opening lower persistent file " "for lower_dentry [0x%p] and lower_mnt [0x%p]; " "rc = [%d]\n", lower_dentry, lower_mnt, rc); - rc = PTR_ERR(inode_info->lower_file); inode_info->lower_file = NULL; } } |