Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Tue, 21 Nov 2023 18:45:43 +0000 | Subject | [PATCH] net: stmmac: fix out-of-bounds read via memcpy detected by KASAN | From | Ray Zhang <> |
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CONFIG_KASAN detected out-of-bounds read via memcpy in stmmac_get_strings. The fix is to change memcpy to strscpy.
Tested: <machine_obfuscated>:~# ethtool -i <interface_obfuscated> driver: st_gmac <machine_obfuscated>:~# ethtool -S <interface_obfuscated> NIC statistics: ATPES: 0 TPES: 0 RDPES: 0 MPES: 0 MTSPES: 0 ARPES: 0 CWPES: 0 ASRPES: 0 TTES: 0 RTES: 0 CTES: 0 ATES: 0 PTES: 0 T125ES: 0 R125ES: 0 RVCTES: 0 MSTTES: 0 SLVTES: 0 ATITES: 0 ARITES: 0 FSMPES: 0 TXCES: 0 TXAMS: 0 TXUES: 0 RXCES: 0 RXAMS: 0 RXUES: 0 ECES: 0 EAMS: 0 EUES: 0 RPCES: 0 RPAMS: 0 RPUES: 0 TCES: 0 TAMS: 0 TUES: 0 mmc_tx_octetcount_gb: 11612 mmc_tx_framecount_gb: 100 mmc_tx_broadcastframe_g: 0 mmc_tx_multicastframe_g: 42 mmc_tx_64_octets_gb: 0 mmc_tx_65_to_127_octets_gb: 62 mmc_tx_128_to_255_octets_gb: 38 mmc_tx_256_to_511_octets_gb: 0 mmc_tx_512_to_1023_octets_gb: 0 mmc_tx_1024_to_max_octets_gb: 0 mmc_tx_unicast_gb: 58 mmc_tx_multicast_gb: 42 mmc_tx_broadcast_gb: 0 mmc_tx_underflow_error: 0 mmc_tx_singlecol_g: 0 mmc_tx_multicol_g: 0 mmc_tx_deferred: 0 mmc_tx_latecol: 0 mmc_tx_exesscol: 0 mmc_tx_carrier_error: 0 mmc_tx_octetcount_g: 11612 mmc_tx_framecount_g: 100 mmc_tx_excessdef: 0 mmc_tx_pause_frame: 0 mmc_tx_vlan_frame_g: 0 mmc_rx_framecount_gb: 64 mmc_rx_octetcount_gb: 30235 mmc_rx_octetcount_g: 30235 mmc_rx_broadcastframe_g: 0 mmc_rx_multicastframe_g: 0 mmc_rx_crc_error: 0 mmc_rx_align_error: 0 mmc_rx_run_error: 0 mmc_rx_jabber_error: 0 mmc_rx_undersize_g: 0 mmc_rx_oversize_g: 0 mmc_rx_64_octets_gb: 0 mmc_rx_65_to_127_octets_gb: 9 mmc_rx_128_to_255_octets_gb: 22 mmc_rx_256_to_511_octets_gb: 21 mmc_rx_512_to_1023_octets_gb: 2 mmc_rx_1024_to_max_octets_gb: 10 mmc_rx_unicast_g: 64 mmc_rx_length_error: 0 mmc_rx_autofrangetype: 0 mmc_rx_pause_frames: 0 mmc_rx_fifo_overflow: 0 mmc_rx_vlan_frames_gb: 0 mmc_rx_watchdog_error: 0 mmc_rx_ipc_intr_mask: 0 mmc_rx_ipc_intr: 0 mmc_rx_ipv4_gd: 0 mmc_rx_ipv4_hderr: 0 mmc_rx_ipv4_nopay: 0 mmc_rx_ipv4_frag: 0 mmc_rx_ipv4_udsbl: 0 mmc_rx_ipv4_gd_octets: 0 mmc_rx_ipv4_hderr_octets: 0 mmc_rx_ipv4_nopay_octets: 0 mmc_rx_ipv4_frag_octets: 0 mmc_rx_ipv4_udsbl_octets: 0 mmc_rx_ipv6_gd_octets: 0 mmc_rx_ipv6_hderr_octets: 0 mmc_rx_ipv6_nopay_octets: 0 mmc_rx_ipv6_gd: 0 mmc_rx_ipv6_hderr: 0 mmc_rx_ipv6_nopay: 0 mmc_rx_udp_gd: 0 mmc_rx_udp_err: 0 mmc_rx_tcp_gd: 0 mmc_rx_tcp_err: 0 mmc_rx_icmp_gd: 0 mmc_rx_icmp_err: 0 mmc_rx_udp_gd_octets: 0 mmc_rx_udp_err_octets: 0 mmc_rx_tcp_gd_octets: 0 mmc_rx_tcp_err_octets: 0 mmc_rx_icmp_gd_octets: 0 mmc_rx_icmp_err_octets: 0 mmc_tx_fpe_fragment_cntr: 0 mmc_tx_hold_req_cntr: 0 mmc_rx_packet_assembly_err_cntr: 0 mmc_rx_packet_smd_err_cntr: 0 mmc_rx_packet_assembly_ok_cntr: 0 mmc_rx_fpe_fragment_cntr: 0 tx_underflow: 0 tx_carrier: 0 tx_losscarrier: 0 vlan_tag: 0 tx_deferred: 0 tx_vlan: 0 tx_jabber: 0 tx_frame_flushed: 0 tx_payload_error: 0 tx_ip_header_error: 0 rx_desc: 0 sa_filter_fail: 0 overflow_error: 0 ipc_csum_error: 0 rx_collision: 0 rx_crc_errors: 0 dribbling_bit: 0 rx_length: 0 rx_mii: 0 rx_multicast: 0 rx_gmac_overflow: 0 rx_watchdog: 0 da_rx_filter_fail: 0 sa_rx_filter_fail: 0 rx_missed_cntr: 0 rx_overflow_cntr: 0 rx_vlan: 0 rx_split_hdr_pkt_n: 0 tx_undeflow_irq: 0 tx_process_stopped_irq: 0 tx_jabber_irq: 0 rx_overflow_irq: 0 rx_buf_unav_irq: 0 rx_process_stopped_irq: 0 rx_watchdog_irq: 0 tx_early_irq: 0 fatal_bus_error_irq: 0 rx_early_irq: 0 threshold: 64 tx_pkt_n: 100 rx_pkt_n: 64 normal_irq_n: 62 rx_normal_irq_n: 58 napi_poll: 215 tx_normal_irq_n: 4 tx_clean: 157 tx_set_ic_bit: 4 irq_receive_pmt_irq_n: 0 mmc_tx_irq_n: 0 mmc_rx_irq_n: 0 mmc_rx_csum_offload_irq_n: 0 irq_tx_path_in_lpi_mode_n: 0 irq_tx_path_exit_lpi_mode_n: 0 irq_rx_path_in_lpi_mode_n: 0 irq_rx_path_exit_lpi_mode_n: 0 phy_eee_wakeup_error_n: 0 ip_hdr_err: 0 ip_payload_err: 0 ip_csum_bypassed: 0 ipv4_pkt_rcvd: 0 ipv6_pkt_rcvd: 64 no_ptp_rx_msg_type_ext: 64 ptp_rx_msg_type_sync: 0 ptp_rx_msg_type_follow_up: 0 ptp_rx_msg_type_delay_req: 0 ptp_rx_msg_type_delay_resp: 0 ptp_rx_msg_type_pdelay_req: 0 ptp_rx_msg_type_pdelay_resp: 0 ptp_rx_msg_type_pdelay_follow_up: 0 ptp_rx_msg_type_announce: 0 ptp_rx_msg_type_management: 0 ptp_rx_msg_pkt_reserved_type: 0 ptp_frame_type: 0 ptp_ver: 0 timestamp_dropped: 0 av_pkt_rcvd: 0 av_tagged_pkt_rcvd: 0 vlan_tag_priority_val: 0 l3_filter_match: 0 l4_filter_match: 0 l3_l4_filter_no_match: 0 irq_pcs_ane_n: 0 irq_pcs_link_n: 0 irq_rgmii_n: 0 mtl_tx_status_fifo_full: 0 mtl_tx_fifo_not_empty: 0 mmtl_fifo_ctrl: 0 mtl_tx_fifo_read_ctrl_write: 0 mtl_tx_fifo_read_ctrl_wait: 0 mtl_tx_fifo_read_ctrl_read: 0 mtl_tx_fifo_read_ctrl_idle: 0 mac_tx_in_pause: 0 mac_tx_frame_ctrl_xfer: 0 mac_tx_frame_ctrl_idle: 0 mac_tx_frame_ctrl_wait: 0 mac_tx_frame_ctrl_pause: 0 mac_gmii_tx_proto_engine: 0 mtl_rx_fifo_fill_level_full: 0 mtl_rx_fifo_fill_above_thresh: 0 mtl_rx_fifo_fill_below_thresh: 0 mtl_rx_fifo_fill_level_empty: 0 mtl_rx_fifo_read_ctrl_flush: 0 mtl_rx_fifo_read_ctrl_read_data: 0 mtl_rx_fifo_read_ctrl_status: 0 mtl_rx_fifo_read_ctrl_idle: 0 mtl_rx_fifo_ctrl_active: 0 mac_rx_frame_ctrl_fifo: 0 mac_gmii_rx_proto_engine: 0 tx_tso_frames: 0 tx_tso_nfrags: 0 mtl_est_cgce: 0 mtl_est_hlbs: 0 mtl_est_hlbf: 0 mtl_est_btre: 0 mtl_est_btrlm: 0 q0_tx_pkt_n: 100 q0_tx_irq_n: 4 q0_rx_pkt_n: 64 q0_rx_irq_n: 58
Signed-off-by: Ray Zhang <sgzhang@google.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c index f628411ae4ae..127cde8f976e 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c @@ -749,23 +749,24 @@ static void stmmac_get_strings(struct net_device *dev, u32 stringset, u8 *data) if (!stmmac_safety_feat_dump(priv, &priv->sstats, i, NULL, &desc)) { - memcpy(p, desc, ETH_GSTRING_LEN); + strscpy(p, desc, ETH_GSTRING_LEN); p += ETH_GSTRING_LEN; } } } if (priv->dma_cap.rmon) for (i = 0; i < STMMAC_MMC_STATS_LEN; i++) { - memcpy(p, stmmac_mmc[i].stat_string, - ETH_GSTRING_LEN); + strscpy(p, stmmac_mmc[i].stat_string, + ETH_GSTRING_LEN); p += ETH_GSTRING_LEN; } for (i = 0; i < STMMAC_STATS_LEN; i++) { - memcpy(p, stmmac_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); + strscpy(p, stmmac_gstrings_stats[i].stat_string, + ETH_GSTRING_LEN); p += ETH_GSTRING_LEN; } for (i = 0; i < STMMAC_QSTATS; i++) { - memcpy(p, stmmac_qstats_string[i], ETH_GSTRING_LEN); + strscpy(p, stmmac_qstats_string[i], ETH_GSTRING_LEN); p += ETH_GSTRING_LEN; } stmmac_get_qstats_string(priv, p); -- 2.43.0.rc1.413.gea7ed67945-goog
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