Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...

Pull general security layer updates from James Morris:

 - Convert security hooks from list to hlist, a nice cleanup, saving
   about 50% of space, from Sargun Dhillon.

 - Only pass the cred, not the secid, to kill_pid_info_as_cred and
   security_task_kill (as the secid can be determined from the cred),
   from Stephen Smalley.

 - Close a potential race in kernel_read_file(), by making the file
   unwritable before calling the LSM check (vs after), from Kees Cook.

* 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  security: convert security hooks to use hlist
  exec: Set file unwritable before LSM check
  usb, signal, security: only pass the cred, not the secid, to kill_pid_info_as_cred and security_task_kill

diff --cc include/linux/lsm_hooks.h
index 6e6951b,ac49113..c72c42d
--- 1/include/linux/lsm_hooks.h
--- 2/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@@ -1763,233 -1731,230 +1764,233 @@@ union security_list_options 
  };
  
  struct security_hook_heads {
-       struct list_head binder_set_context_mgr;
-       struct list_head binder_transaction;
-       struct list_head binder_transfer_binder;
-       struct list_head binder_transfer_file;
-       struct list_head ptrace_access_check;
-       struct list_head ptrace_traceme;
-       struct list_head capget;
-       struct list_head capset;
-       struct list_head capable;
-       struct list_head quotactl;
-       struct list_head quota_on;
-       struct list_head syslog;
-       struct list_head settime;
-       struct list_head vm_enough_memory;
-       struct list_head bprm_set_creds;
-       struct list_head bprm_check_security;
-       struct list_head bprm_committing_creds;
-       struct list_head bprm_committed_creds;
-       struct list_head sb_alloc_security;
-       struct list_head sb_free_security;
-       struct list_head sb_copy_data;
-       struct list_head sb_remount;
-       struct list_head sb_kern_mount;
-       struct list_head sb_show_options;
-       struct list_head sb_statfs;
-       struct list_head sb_mount;
-       struct list_head sb_umount;
-       struct list_head sb_pivotroot;
-       struct list_head sb_set_mnt_opts;
-       struct list_head sb_clone_mnt_opts;
-       struct list_head sb_parse_opts_str;
-       struct list_head dentry_init_security;
-       struct list_head dentry_create_files_as;
+       struct hlist_head binder_set_context_mgr;
+       struct hlist_head binder_transaction;
+       struct hlist_head binder_transfer_binder;
+       struct hlist_head binder_transfer_file;
+       struct hlist_head ptrace_access_check;
+       struct hlist_head ptrace_traceme;
+       struct hlist_head capget;
+       struct hlist_head capset;
+       struct hlist_head capable;
+       struct hlist_head quotactl;
+       struct hlist_head quota_on;
+       struct hlist_head syslog;
+       struct hlist_head settime;
+       struct hlist_head vm_enough_memory;
+       struct hlist_head bprm_set_creds;
+       struct hlist_head bprm_check_security;
+       struct hlist_head bprm_committing_creds;
+       struct hlist_head bprm_committed_creds;
+       struct hlist_head sb_alloc_security;
+       struct hlist_head sb_free_security;
+       struct hlist_head sb_copy_data;
+       struct hlist_head sb_remount;
+       struct hlist_head sb_kern_mount;
+       struct hlist_head sb_show_options;
+       struct hlist_head sb_statfs;
+       struct hlist_head sb_mount;
+       struct hlist_head sb_umount;
+       struct hlist_head sb_pivotroot;
+       struct hlist_head sb_set_mnt_opts;
+       struct hlist_head sb_clone_mnt_opts;
+       struct hlist_head sb_parse_opts_str;
+       struct hlist_head dentry_init_security;
+       struct hlist_head dentry_create_files_as;
  #ifdef CONFIG_SECURITY_PATH
-       struct list_head path_unlink;
-       struct list_head path_mkdir;
-       struct list_head path_rmdir;
-       struct list_head path_mknod;
-       struct list_head path_truncate;
-       struct list_head path_symlink;
-       struct list_head path_link;
-       struct list_head path_rename;
-       struct list_head path_chmod;
-       struct list_head path_chown;
-       struct list_head path_chroot;
+       struct hlist_head path_unlink;
+       struct hlist_head path_mkdir;
+       struct hlist_head path_rmdir;
+       struct hlist_head path_mknod;
+       struct hlist_head path_truncate;
+       struct hlist_head path_symlink;
+       struct hlist_head path_link;
+       struct hlist_head path_rename;
+       struct hlist_head path_chmod;
+       struct hlist_head path_chown;
+       struct hlist_head path_chroot;
  #endif
-       struct list_head inode_alloc_security;
-       struct list_head inode_free_security;
-       struct list_head inode_init_security;
-       struct list_head inode_create;
-       struct list_head inode_link;
-       struct list_head inode_unlink;
-       struct list_head inode_symlink;
-       struct list_head inode_mkdir;
-       struct list_head inode_rmdir;
-       struct list_head inode_mknod;
-       struct list_head inode_rename;
-       struct list_head inode_readlink;
-       struct list_head inode_follow_link;
-       struct list_head inode_permission;
-       struct list_head inode_setattr;
-       struct list_head inode_getattr;
-       struct list_head inode_setxattr;
-       struct list_head inode_post_setxattr;
-       struct list_head inode_getxattr;
-       struct list_head inode_listxattr;
-       struct list_head inode_removexattr;
-       struct list_head inode_need_killpriv;
-       struct list_head inode_killpriv;
-       struct list_head inode_getsecurity;
-       struct list_head inode_setsecurity;
-       struct list_head inode_listsecurity;
-       struct list_head inode_getsecid;
-       struct list_head inode_copy_up;
-       struct list_head inode_copy_up_xattr;
-       struct list_head file_permission;
-       struct list_head file_alloc_security;
-       struct list_head file_free_security;
-       struct list_head file_ioctl;
-       struct list_head mmap_addr;
-       struct list_head mmap_file;
-       struct list_head file_mprotect;
-       struct list_head file_lock;
-       struct list_head file_fcntl;
-       struct list_head file_set_fowner;
-       struct list_head file_send_sigiotask;
-       struct list_head file_receive;
-       struct list_head file_open;
-       struct list_head task_alloc;
-       struct list_head task_free;
-       struct list_head cred_alloc_blank;
-       struct list_head cred_free;
-       struct list_head cred_prepare;
-       struct list_head cred_transfer;
-       struct list_head kernel_act_as;
-       struct list_head kernel_create_files_as;
-       struct list_head kernel_read_file;
-       struct list_head kernel_post_read_file;
-       struct list_head kernel_module_request;
-       struct list_head task_fix_setuid;
-       struct list_head task_setpgid;
-       struct list_head task_getpgid;
-       struct list_head task_getsid;
-       struct list_head task_getsecid;
-       struct list_head task_setnice;
-       struct list_head task_setioprio;
-       struct list_head task_getioprio;
-       struct list_head task_prlimit;
-       struct list_head task_setrlimit;
-       struct list_head task_setscheduler;
-       struct list_head task_getscheduler;
-       struct list_head task_movememory;
-       struct list_head task_kill;
-       struct list_head task_prctl;
-       struct list_head task_to_inode;
-       struct list_head ipc_permission;
-       struct list_head ipc_getsecid;
-       struct list_head msg_msg_alloc_security;
-       struct list_head msg_msg_free_security;
-       struct list_head msg_queue_alloc_security;
-       struct list_head msg_queue_free_security;
-       struct list_head msg_queue_associate;
-       struct list_head msg_queue_msgctl;
-       struct list_head msg_queue_msgsnd;
-       struct list_head msg_queue_msgrcv;
-       struct list_head shm_alloc_security;
-       struct list_head shm_free_security;
-       struct list_head shm_associate;
-       struct list_head shm_shmctl;
-       struct list_head shm_shmat;
-       struct list_head sem_alloc_security;
-       struct list_head sem_free_security;
-       struct list_head sem_associate;
-       struct list_head sem_semctl;
-       struct list_head sem_semop;
-       struct list_head netlink_send;
-       struct list_head d_instantiate;
-       struct list_head getprocattr;
-       struct list_head setprocattr;
-       struct list_head ismaclabel;
-       struct list_head secid_to_secctx;
-       struct list_head secctx_to_secid;
-       struct list_head release_secctx;
-       struct list_head inode_invalidate_secctx;
-       struct list_head inode_notifysecctx;
-       struct list_head inode_setsecctx;
-       struct list_head inode_getsecctx;
+       struct hlist_head inode_alloc_security;
+       struct hlist_head inode_free_security;
+       struct hlist_head inode_init_security;
+       struct hlist_head inode_create;
+       struct hlist_head inode_link;
+       struct hlist_head inode_unlink;
+       struct hlist_head inode_symlink;
+       struct hlist_head inode_mkdir;
+       struct hlist_head inode_rmdir;
+       struct hlist_head inode_mknod;
+       struct hlist_head inode_rename;
+       struct hlist_head inode_readlink;
+       struct hlist_head inode_follow_link;
+       struct hlist_head inode_permission;
+       struct hlist_head inode_setattr;
+       struct hlist_head inode_getattr;
+       struct hlist_head inode_setxattr;
+       struct hlist_head inode_post_setxattr;
+       struct hlist_head inode_getxattr;
+       struct hlist_head inode_listxattr;
+       struct hlist_head inode_removexattr;
+       struct hlist_head inode_need_killpriv;
+       struct hlist_head inode_killpriv;
+       struct hlist_head inode_getsecurity;
+       struct hlist_head inode_setsecurity;
+       struct hlist_head inode_listsecurity;
+       struct hlist_head inode_getsecid;
+       struct hlist_head inode_copy_up;
+       struct hlist_head inode_copy_up_xattr;
+       struct hlist_head file_permission;
+       struct hlist_head file_alloc_security;
+       struct hlist_head file_free_security;
+       struct hlist_head file_ioctl;
+       struct hlist_head mmap_addr;
+       struct hlist_head mmap_file;
+       struct hlist_head file_mprotect;
+       struct hlist_head file_lock;
+       struct hlist_head file_fcntl;
+       struct hlist_head file_set_fowner;
+       struct hlist_head file_send_sigiotask;
+       struct hlist_head file_receive;
+       struct hlist_head file_open;
+       struct hlist_head task_alloc;
+       struct hlist_head task_free;
+       struct hlist_head cred_alloc_blank;
+       struct hlist_head cred_free;
+       struct hlist_head cred_prepare;
+       struct hlist_head cred_transfer;
+       struct hlist_head kernel_act_as;
+       struct hlist_head kernel_create_files_as;
+       struct hlist_head kernel_read_file;
+       struct hlist_head kernel_post_read_file;
+       struct hlist_head kernel_module_request;
+       struct hlist_head task_fix_setuid;
+       struct hlist_head task_setpgid;
+       struct hlist_head task_getpgid;
+       struct hlist_head task_getsid;
+       struct hlist_head task_getsecid;
+       struct hlist_head task_setnice;
+       struct hlist_head task_setioprio;
+       struct hlist_head task_getioprio;
+       struct hlist_head task_prlimit;
+       struct hlist_head task_setrlimit;
+       struct hlist_head task_setscheduler;
+       struct hlist_head task_getscheduler;
+       struct hlist_head task_movememory;
+       struct hlist_head task_kill;
+       struct hlist_head task_prctl;
+       struct hlist_head task_to_inode;
+       struct hlist_head ipc_permission;
+       struct hlist_head ipc_getsecid;
+       struct hlist_head msg_msg_alloc_security;
+       struct hlist_head msg_msg_free_security;
+       struct hlist_head msg_queue_alloc_security;
+       struct hlist_head msg_queue_free_security;
+       struct hlist_head msg_queue_associate;
+       struct hlist_head msg_queue_msgctl;
+       struct hlist_head msg_queue_msgsnd;
+       struct hlist_head msg_queue_msgrcv;
+       struct hlist_head shm_alloc_security;
+       struct hlist_head shm_free_security;
+       struct hlist_head shm_associate;
+       struct hlist_head shm_shmctl;
+       struct hlist_head shm_shmat;
+       struct hlist_head sem_alloc_security;
+       struct hlist_head sem_free_security;
+       struct hlist_head sem_associate;
+       struct hlist_head sem_semctl;
+       struct hlist_head sem_semop;
+       struct hlist_head netlink_send;
+       struct hlist_head d_instantiate;
+       struct hlist_head getprocattr;
+       struct hlist_head setprocattr;
+       struct hlist_head ismaclabel;
+       struct hlist_head secid_to_secctx;
+       struct hlist_head secctx_to_secid;
+       struct hlist_head release_secctx;
+       struct hlist_head inode_invalidate_secctx;
+       struct hlist_head inode_notifysecctx;
+       struct hlist_head inode_setsecctx;
+       struct hlist_head inode_getsecctx;
  #ifdef CONFIG_SECURITY_NETWORK
-       struct list_head unix_stream_connect;
-       struct list_head unix_may_send;
-       struct list_head socket_create;
-       struct list_head socket_post_create;
-       struct list_head socket_bind;
-       struct list_head socket_connect;
-       struct list_head socket_listen;
-       struct list_head socket_accept;
-       struct list_head socket_sendmsg;
-       struct list_head socket_recvmsg;
-       struct list_head socket_getsockname;
-       struct list_head socket_getpeername;
-       struct list_head socket_getsockopt;
-       struct list_head socket_setsockopt;
-       struct list_head socket_shutdown;
-       struct list_head socket_sock_rcv_skb;
-       struct list_head socket_getpeersec_stream;
-       struct list_head socket_getpeersec_dgram;
-       struct list_head sk_alloc_security;
-       struct list_head sk_free_security;
-       struct list_head sk_clone_security;
-       struct list_head sk_getsecid;
-       struct list_head sock_graft;
-       struct list_head inet_conn_request;
-       struct list_head inet_csk_clone;
-       struct list_head inet_conn_established;
-       struct list_head secmark_relabel_packet;
-       struct list_head secmark_refcount_inc;
-       struct list_head secmark_refcount_dec;
-       struct list_head req_classify_flow;
-       struct list_head tun_dev_alloc_security;
-       struct list_head tun_dev_free_security;
-       struct list_head tun_dev_create;
-       struct list_head tun_dev_attach_queue;
-       struct list_head tun_dev_attach;
-       struct list_head tun_dev_open;
-       struct list_head sctp_assoc_request;
-       struct list_head sctp_bind_connect;
-       struct list_head sctp_sk_clone;
+       struct hlist_head unix_stream_connect;
+       struct hlist_head unix_may_send;
+       struct hlist_head socket_create;
+       struct hlist_head socket_post_create;
+       struct hlist_head socket_bind;
+       struct hlist_head socket_connect;
+       struct hlist_head socket_listen;
+       struct hlist_head socket_accept;
+       struct hlist_head socket_sendmsg;
+       struct hlist_head socket_recvmsg;
+       struct hlist_head socket_getsockname;
+       struct hlist_head socket_getpeername;
+       struct hlist_head socket_getsockopt;
+       struct hlist_head socket_setsockopt;
+       struct hlist_head socket_shutdown;
+       struct hlist_head socket_sock_rcv_skb;
+       struct hlist_head socket_getpeersec_stream;
+       struct hlist_head socket_getpeersec_dgram;
+       struct hlist_head sk_alloc_security;
+       struct hlist_head sk_free_security;
+       struct hlist_head sk_clone_security;
+       struct hlist_head sk_getsecid;
+       struct hlist_head sock_graft;
+       struct hlist_head inet_conn_request;
+       struct hlist_head inet_csk_clone;
+       struct hlist_head inet_conn_established;
+       struct hlist_head secmark_relabel_packet;
+       struct hlist_head secmark_refcount_inc;
+       struct hlist_head secmark_refcount_dec;
+       struct hlist_head req_classify_flow;
+       struct hlist_head tun_dev_alloc_security;
+       struct hlist_head tun_dev_free_security;
+       struct hlist_head tun_dev_create;
+       struct hlist_head tun_dev_attach_queue;
+       struct hlist_head tun_dev_attach;
+       struct hlist_head tun_dev_open;
++      struct hlist_head sctp_assoc_request;
++      struct hlist_head sctp_bind_connect;
++      struct hlist_head sctp_sk_clone;
  #endif        /* CONFIG_SECURITY_NETWORK */
  #ifdef CONFIG_SECURITY_INFINIBAND
-       struct list_head ib_pkey_access;
-       struct list_head ib_endport_manage_subnet;
-       struct list_head ib_alloc_security;
-       struct list_head ib_free_security;
+       struct hlist_head ib_pkey_access;
+       struct hlist_head ib_endport_manage_subnet;
+       struct hlist_head ib_alloc_security;
+       struct hlist_head ib_free_security;
  #endif        /* CONFIG_SECURITY_INFINIBAND */
  #ifdef CONFIG_SECURITY_NETWORK_XFRM
-       struct list_head xfrm_policy_alloc_security;
-       struct list_head xfrm_policy_clone_security;
-       struct list_head xfrm_policy_free_security;
-       struct list_head xfrm_policy_delete_security;
-       struct list_head xfrm_state_alloc;
-       struct list_head xfrm_state_alloc_acquire;
-       struct list_head xfrm_state_free_security;
-       struct list_head xfrm_state_delete_security;
-       struct list_head xfrm_policy_lookup;
-       struct list_head xfrm_state_pol_flow_match;
-       struct list_head xfrm_decode_session;
+       struct hlist_head xfrm_policy_alloc_security;
+       struct hlist_head xfrm_policy_clone_security;
+       struct hlist_head xfrm_policy_free_security;
+       struct hlist_head xfrm_policy_delete_security;
+       struct hlist_head xfrm_state_alloc;
+       struct hlist_head xfrm_state_alloc_acquire;
+       struct hlist_head xfrm_state_free_security;
+       struct hlist_head xfrm_state_delete_security;
+       struct hlist_head xfrm_policy_lookup;
+       struct hlist_head xfrm_state_pol_flow_match;
+       struct hlist_head xfrm_decode_session;
  #endif        /* CONFIG_SECURITY_NETWORK_XFRM */
  #ifdef CONFIG_KEYS
-       struct list_head key_alloc;
-       struct list_head key_free;
-       struct list_head key_permission;
-       struct list_head key_getsecurity;
+       struct hlist_head key_alloc;
+       struct hlist_head key_free;
+       struct hlist_head key_permission;
+       struct hlist_head key_getsecurity;
  #endif        /* CONFIG_KEYS */
  #ifdef CONFIG_AUDIT
-       struct list_head audit_rule_init;
-       struct list_head audit_rule_known;
-       struct list_head audit_rule_match;
-       struct list_head audit_rule_free;
+       struct hlist_head audit_rule_init;
+       struct hlist_head audit_rule_known;
+       struct hlist_head audit_rule_match;
+       struct hlist_head audit_rule_free;
  #endif /* CONFIG_AUDIT */
  #ifdef CONFIG_BPF_SYSCALL
-       struct list_head bpf;
-       struct list_head bpf_map;
-       struct list_head bpf_prog;
-       struct list_head bpf_map_alloc_security;
-       struct list_head bpf_map_free_security;
-       struct list_head bpf_prog_alloc_security;
-       struct list_head bpf_prog_free_security;
+       struct hlist_head bpf;
+       struct hlist_head bpf_map;
+       struct hlist_head bpf_prog;
+       struct hlist_head bpf_map_alloc_security;
+       struct hlist_head bpf_map_free_security;
+       struct hlist_head bpf_prog_alloc_security;
+       struct hlist_head bpf_prog_free_security;
  #endif /* CONFIG_BPF_SYSCALL */
  } __randomize_layout;
  

diff --cc include/linux/security.h
Simple merge

diff --cc kernel/signal.c
Simple merge

diff --cc security/apparmor/lsm.c
Simple merge

diff --cc security/security.c
Simple merge

diff --cc security/selinux/hooks.c
index 0314fc7,8abd542..2b8c55e
--- 1/security/selinux/hooks.c
--- 2/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@@ -4164,10 -4045,11 +4165,12 @@@ static int selinux_task_kill(struct tas
                perm = PROCESS__SIGNULL; /* null signal; existence test */
        else
                perm = signal_to_av(sig);
-       if (!secid)
+       if (!cred)
                secid = current_sid();
 -      return avc_has_perm(secid, task_sid(p), SECCLASS_PROCESS, perm, NULL);
+       else
+               secid = cred_sid(cred);
 +      return avc_has_perm(&selinux_state,
 +                          secid, task_sid(p), SECCLASS_PROCESS, perm, NULL);
  }
  
  static void selinux_task_to_inode(struct task_struct *p,

diff --cc security/smack/smack_lsm.c
Simple merge