Messages in this thread Patch in this message | | | Subject | [PATCH 3/7] SELinux: Stub in copy-up handling | From | David Howells <> | Date | Wed, 05 Nov 2014 15:42:48 +0000 |
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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 <dhowells@redhat.com> ---
security/selinux/hooks.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index e66314138b38..f3fe7dbbf741 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3142,6 +3142,19 @@ 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) @@ -5868,6 +5881,8 @@ 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,
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