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| author | Ondrej Mosnacek <omosnace@redhat.com> | 2018-11-13 16:16:08 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-21 09:19:24 +0100 |
| commit | c75e3cbfd91b421747d1ff74f706315855706297 (patch) | |
| tree | 219a4cdb8f342bd3f8b6406e2793d92548ddfe62 /security | |
| parent | 18cd6106cf9b427ae072964c7c36b05df5704cd3 (diff) | |
| download | linux-stable-c75e3cbfd91b421747d1ff74f706315855706297.tar.gz linux-stable-c75e3cbfd91b421747d1ff74f706315855706297.tar.bz2 linux-stable-c75e3cbfd91b421747d1ff74f706315855706297.zip | |
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>
Diffstat (limited to 'security')
| -rw-r--r-- | security/selinux/hooks.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 18b98b5e1e3c..fe251c6f09f1 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -5318,6 +5318,9 @@ static int selinux_sctp_bind_connect(struct sock *sk, int optname, addr_buf = address; while (walk_size < addrlen) { + if (walk_size + sizeof(sa_family_t) > addrlen) + return -EINVAL; + addr = addr_buf; switch (addr->sa_family) { case AF_UNSPEC: |