Provide stubs for union/overlay copy-up handling. The xattr copy up stub discards lower SELinux xattrs rather than letting them be copied up so that the security label on the copy doesn't get corrupted.
Signed-off-by: David Howells <[email protected]> --- security/selinux/hooks.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index ffa5a642629a..c5d893e2ff23 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3200,6 +3200,20 @@ static void selinux_inode_getsecid(const struct inode *inode, u32 *secid) *secid = isec->sid; } +static int selinux_inode_copy_up(struct dentry *src, struct dentry *dst) +{ + return 0; +} + +static int selinux_inode_copy_up_xattr(struct dentry *src, struct dentry *dst, + const char *name, void *value, + size_t *size) +{ + if (strcmp(name, XATTR_NAME_SELINUX) == 0) + return 1; /* Discard */ + return 0; +} + /* file security operations */ static int selinux_revalidate_file_permission(struct file *file, int mask) @@ -5917,6 +5931,8 @@ static struct security_operations selinux_ops = { .inode_setsecurity = selinux_inode_setsecurity, .inode_listsecurity = selinux_inode_listsecurity, .inode_getsecid = selinux_inode_getsecid, + .inode_copy_up = selinux_inode_copy_up, + .inode_copy_up_xattr = selinux_inode_copy_up_xattr, .file_permission = selinux_file_permission, .file_alloc_security = selinux_file_alloc_security, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
