[ Upstream commit55655e3d11] syzbot found we can leak memory in packet_set_ring(), if user application provides buggy parameters. Fixes:7f953ab2ba("af_packet: TX_RING support for TPACKET_V3") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Sowmini Varadhan <sowmini.varadhan@oracle.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>