tree 7b62e48c303c7fa6e2f2983895c581f11eb3080d
parent 18d971807db59b4f31a4cdde30c2353f9d4048d1
author Jeremy Cline <jcline@redhat.com> 1532731381 +0000
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1533565384 +0200

net: socket: fix potential spectre v1 gadget in socketcall

commit c8e8cd579bb4265651df8223730105341e61a2d1 upstream.

'call' is a user-controlled value, so sanitize the array index after the
bounds check to avoid speculating past the bounds of the 'nargs' array.

Found with the help of Smatch:

net/socket.c:2508 __do_sys_socketcall() warn: potential spectre issue
'nargs' [r] (local cap)

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeremy Cline <jcline@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>