Revision ba91c49dedbde758ba0b72f57ac90b06ddf8e548 authored by Maxim Mikityanskiy on 10 June 2021, 16:40:31 UTC, committed by David S. Miller on 10 June 2021, 21:26:18 UTC
The TCP option parser in cake qdisc (cake_get_tcpopt and
cake_tcph_may_drop) could read one byte out of bounds. When the length
is 1, the execution flow gets into the loop, reads one byte of the
opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads
one more byte, which exceeds the length of 1.
This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack
out of bounds when parsing TCP options.").
v2 changes:
Added doff validation in cake_get_tcphdr to avoid parsing garbage as TCP
header. Although it wasn't strictly an out-of-bounds access (memory was
allocated), garbage values could be read where CAKE expected the TCP
header if doff was smaller than 5.
Cc: Young Xiao <92siuyang@gmail.com>
Fixes: 8b7138814f29 ("sch_cake: Add optional ACK filter")
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 07718be
rds_single_path.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _RDS_RDS_SINGLE_H
#define _RDS_RDS_SINGLE_H
#define c_xmit_rm c_path[0].cp_xmit_rm
#define c_xmit_sg c_path[0].cp_xmit_sg
#define c_xmit_hdr_off c_path[0].cp_xmit_hdr_off
#define c_xmit_data_off c_path[0].cp_xmit_data_off
#define c_xmit_atomic_sent c_path[0].cp_xmit_atomic_sent
#define c_xmit_rdma_sent c_path[0].cp_xmit_rdma_sent
#define c_xmit_data_sent c_path[0].cp_xmit_data_sent
#define c_lock c_path[0].cp_lock
#define c_next_tx_seq c_path[0].cp_next_tx_seq
#define c_send_queue c_path[0].cp_send_queue
#define c_retrans c_path[0].cp_retrans
#define c_next_rx_seq c_path[0].cp_next_rx_seq
#define c_transport_data c_path[0].cp_transport_data
#define c_state c_path[0].cp_state
#define c_send_gen c_path[0].cp_send_gen
#define c_flags c_path[0].cp_flags
#define c_reconnect_jiffies c_path[0].cp_reconnect_jiffies
#define c_send_w c_path[0].cp_send_w
#define c_recv_w c_path[0].cp_recv_w
#define c_conn_w c_path[0].cp_conn_w
#define c_down_w c_path[0].cp_down_w
#define c_cm_lock c_path[0].cp_cm_lock
#define c_waitq c_path[0].cp_waitq
#define c_unacked_packets c_path[0].cp_unacked_packets
#define c_unacked_bytes c_path[0].cp_unacked_bytes
#endif /* _RDS_RDS_SINGLE_H */
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