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| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-03-12 06:19:46 +0100 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-04-22 10:54:12 +0200 |
| commit | ae6e84596e7b321d9a08e81679c6a3f799634636 (patch) | |
| tree | a81baed56b7384321cf3d282e2d41f785fe30853 | |
| parent | Linux 2.6.30-rc3 (diff) | |
| download | linux-ae6e84596e7b321d9a08e81679c6a3f799634636.tar.xz linux-ae6e84596e7b321d9a08e81679c6a3f799634636.zip | |
eCryptfs: Copy lower inode attrs before dentry instantiation
Copies the lower inode attributes to the upper inode before passing the
upper inode to d_instantiate(). This is important for
security_d_instantiate().
The problem was discovered by a user seeing SELinux denials like so:
type=AVC msg=audit(1236812817.898:47): avc: denied { 0x100000 } for
pid=3584 comm="httpd" name="testdir" dev=ecryptfs ino=943872
scontext=root:system_r:httpd_t:s0
tcontext=root:object_r:httpd_sys_content_t:s0 tclass=file
Notice target class is file while testdir is really a directory,
confusing the permission translation (0x100000) due to the wrong i_mode.
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
| -rw-r--r-- | fs/ecryptfs/main.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index aed56c25539b..7638b0a02c8d 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -190,14 +190,14 @@ int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry, init_special_inode(inode, lower_inode->i_mode, lower_inode->i_rdev); dentry->d_op = &ecryptfs_dops; - if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD) - d_add(dentry, inode); - else - d_instantiate(dentry, inode); fsstack_copy_attr_all(inode, lower_inode, NULL); /* This size will be overwritten for real files w/ headers and * other metadata */ fsstack_copy_inode_size(inode, lower_inode); + if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD) + d_add(dentry, inode); + else + d_instantiate(dentry, inode); out: return rc; } |