tree b27c667b338f0a9849bc6e963e2320676475a662
parent 8724cc261407c22342dc8664a66ad6a2c5a6b9e9
author Sasha Levin <sasha.levin@oracle.com> 1406862035 -0400
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074836 +0200

iovec: make sure the caller actually wants anything in memcpy_fromiovecend

[ Upstream commit 06ebb06d49486676272a3c030bfeef4bd969a8e6 ]

Check for cases when the caller requests 0 bytes instead of running off
and dereferencing potentially invalid iovecs.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>