selinux: check length properly in SCTP bind hook
authorOndrej Mosnacek <omosnace@redhat.com>
Tue, 13 Nov 2018 15:16:08 +0000 (16:16 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 21 Nov 2018 08:19:24 +0000 (09:19 +0100)
commitc75e3cbfd91b421747d1ff74f706315855706297
tree219a4cdb8f342bd3f8b6406e2793d92548ddfe62
parent18cd6106cf9b427ae072964c7c36b05df5704cd3
selinux: check length properly in SCTP bind hook

commit c138325fb8713472d5a0c3c7258b9131bab40725 upstream.

selinux_sctp_bind_connect() must verify if the address buffer has
sufficient length before accessing the 'sa_family' field. See
__sctp_connect() for a similar check.

The length of the whole address ('len') is already checked in the
callees.

Reported-by: Qian Cai <cai@gmx.us>
Fixes: d452930fd3b9 ("selinux: Add SCTP support")
Cc: <stable@vger.kernel.org> # 4.17+
Cc: Richard Haines <richard_c_haines@btinternet.com>
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Tested-by: Qian Cai <cai@gmx.us>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
security/selinux/hooks.c