The patch titled
eCryptfs: fix lookup error for special files
has been added to the -mm tree. Its filename is
ecryptfs-fix-lookup-error-for-special-files.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: eCryptfs: fix lookup error for special files
From: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
When ecryptfs_lookup() is called against special files, eCryptfs generates
the following errors because it tries to treat them like regular eCryptfs
files.
Error opening lower file for lower_dentry [0xffff810233a6f150], lower_mnt [0xffff810235bb4c80], and flags
[0x8000]
Error opening lower_file to read header region
Error attempting to read the [user.ecryptfs] xattr from the lower file; return value = [-95]
Valid metadata not found in header region or xattr region; treating file as unencrypted
For instance, the problem can be reproduced by the steps below.
# mkdir /root/crypt /mnt/crypt
# mount -t ecryptfs /root/crypt /mnt/crypt
# mknod /mnt/crypt/c0 c 0 0
# umount /mnt/crypt
# mount -t ecryptfs /root/crypt /mnt/crypt
# ls -l /mnt/crypt
This patch fixes it by adding a check similar to directories and
symlinks.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
Acked-by: Michael Halcrow <mhalcrow@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ecryptfs/inode.c | 4 ++++
1 files changed, 4 insertions(+)
diff -puN fs/ecryptfs/inode.c~ecryptfs-fix-lookup-error-for-special-files fs/ecryptfs/inode.c
--- a/fs/ecryptfs/inode.c~ecryptfs-fix-lookup-error-for-special-files
+++ a/fs/ecryptfs/inode.c
@@ -359,6 +359,10 @@ static struct dentry *ecryptfs_lookup(st
ecryptfs_printk(KERN_DEBUG, "Is a symlink; returning\n");
goto out;
}
+ if (special_file(lower_inode->i_mode)) {
+ ecryptfs_printk(KERN_DEBUG, "Is a special file; returning\n");
+ goto out;
+ }
if (!nd) {
ecryptfs_printk(KERN_DEBUG, "We have a NULL nd, just leave"
"as we *think* we are about to unlink\n");
_
Patches currently in -mm which might be from konishi.ryusuke@xxxxxxxxxxxxx are
origin.patch
ecryptfs-fix-lookup-error-for-special-files.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
