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Commit 5f65e5ca authored by Seth Forshee's avatar Seth Forshee Committed by Eric W. Biederman
Browse files

cred: Reject inodes with invalid ids in set_create_file_as() 



Using INVALID_[UG]ID for the LSM file creation context doesn't
make sense, so return an error if the inode passed to
set_create_file_as() has an invalid id.

Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
Acked-by: default avatarSerge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
parent 2d7f9e2a

kernel/cred.c

+2 −0
Original line number Diff line number Diff line
@@ -689,6 +689,8 @@ EXPORT_SYMBOL(set_security_override_from_ctx); 
 */

int set_create_files_as(struct cred *new, struct inode *inode)

{

	if (!uid_valid(inode->i_uid) || !gid_valid(inode->i_gid))

		return -EINVAL;

	new->fsuid = inode->i_uid;

	new->fsgid = inode->i_gid;

	return security_kernel_create_files_as(new, inode);