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authorEric Paris <eparis@redhat.com>2008-03-05 10:31:54 -0500
committerJames Morris <jmorris@namei.org>2008-03-06 08:40:53 +1100
commite0007529893c1c064be90bd21422ca0da4a0198e (patch)
treec2334ba940e682183a18d18972cf95bd3a3da46a /fs/super.c
parent29e8c3c304b62f31b799565c9ee85d42bd163f80 (diff)
downloadlinux-e0007529893c1c064be90bd21422ca0da4a0198e.tar.bz2
LSM/SELinux: Interfaces to allow FS to control mount options
Introduce new LSM interfaces to allow an FS to deal with their own mount options. This includes a new string parsing function exported from the LSM that an FS can use to get a security data blob and a new security data blob. This is particularly useful for an FS which uses binary mount data, like NFS, which does not pass strings into the vfs to be handled by the loaded LSM. Also fix a BUG() in both SELinux and SMACK when dealing with binary mount data. If the binary mount data is less than one page the copy_page() in security_sb_copy_data() can cause an illegal page fault and boom. Remove all NFSisms from the SELinux code since they were broken by past NFS changes. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'fs/super.c')
-rw-r--r--fs/super.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/super.c b/fs/super.c
index 88811f60c8de..010446d8c40a 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -870,12 +870,12 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
if (!mnt)
goto out;
- if (data) {
+ if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {
secdata = alloc_secdata();
if (!secdata)
goto out_mnt;
- error = security_sb_copy_data(type, data, secdata);
+ error = security_sb_copy_data(data, secdata);
if (error)
goto out_free_secdata;
}