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idpf: sprinkle __counted_by{,_le}() in the virtchnl2 header

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Both virtchnl2.h and its consumer idpf_virtchnl.c are very error-prone.
There are 10 structures with flexible arrays at the end, but 9 of them
has flex member counter in Little Endian.
Make the code a bit more robust by applying __counted_by_le() to those
9. LE platforms is the main target for this driver, so they would
receive additional protection.
While we're here, add __counted_by() to virtchnl2_ptype::proto_id, as
its counter is `u8` regardless of the Endianness.
Compile test on x86_64 (LE) didn't reveal any new issues after applying
the attributes.

Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Link: https://lore.kernel.org/r/20240327142241.1745989-4-aleksander.lobakin@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alexander Lobakin 2024-03-27 15:22:41 +01:00 committed by Jakub Kicinski
parent c00d33f1fc
commit 93d24acfa0
1 changed files with 10 additions and 10 deletions
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20
drivers/net/ethernet/intel/idpf/virtchnl2.h
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@ -555,7 +555,7 @@ VIRTCHNL2_CHECK_STRUCT_LEN(32, virtchnl2_queue_reg_chunk);
struct virtchnl2_queue_reg_chunks {
__le16 num_chunks;
u8 pad[6];
struct virtchnl2_queue_reg_chunk chunks[];
struct virtchnl2_queue_reg_chunk chunks[] __counted_by_le(num_chunks);
};
VIRTCHNL2_CHECK_STRUCT_LEN(8, virtchnl2_queue_reg_chunks);
@ -703,7 +703,7 @@ struct virtchnl2_config_tx_queues {
__le32 vport_id;
__le16 num_qinfo;
u8 pad[10];
struct virtchnl2_txq_info qinfo[];
struct virtchnl2_txq_info qinfo[] __counted_by_le(num_qinfo);
};
VIRTCHNL2_CHECK_STRUCT_LEN(16, virtchnl2_config_tx_queues);
@ -782,7 +782,7 @@ struct virtchnl2_config_rx_queues {
__le32 vport_id;
__le16 num_qinfo;
u8 pad[18];
struct virtchnl2_rxq_info qinfo[];
struct virtchnl2_rxq_info qinfo[] __counted_by_le(num_qinfo);
};
VIRTCHNL2_CHECK_STRUCT_LEN(24, virtchnl2_config_rx_queues);
@ -868,7 +868,7 @@ VIRTCHNL2_CHECK_STRUCT_LEN(32, virtchnl2_vector_chunk);
struct virtchnl2_vector_chunks {
__le16 num_vchunks;
u8 pad[14];
struct virtchnl2_vector_chunk vchunks[];
struct virtchnl2_vector_chunk vchunks[] __counted_by_le(num_vchunks);
};
VIRTCHNL2_CHECK_STRUCT_LEN(16, virtchnl2_vector_chunks);
@ -912,7 +912,7 @@ struct virtchnl2_rss_lut {
__le16 lut_entries_start;
__le16 lut_entries;
u8 pad[4];
__le32 lut[];
__le32 lut[] __counted_by_le(lut_entries);
};
VIRTCHNL2_CHECK_STRUCT_LEN(12, virtchnl2_rss_lut);
@ -977,7 +977,7 @@ struct virtchnl2_ptype {
u8 ptype_id_8;
u8 proto_id_count;
__le16 pad;
__le16 proto_id[];
__le16 proto_id[] __counted_by(proto_id_count);
} __packed __aligned(2);
VIRTCHNL2_CHECK_STRUCT_LEN(6, virtchnl2_ptype);
@ -1104,7 +1104,7 @@ struct virtchnl2_rss_key {
__le32 vport_id;
__le16 key_len;
u8 pad;
u8 key_flex[];
u8 key_flex[] __counted_by_le(key_len);
} __packed;
VIRTCHNL2_CHECK_STRUCT_LEN(7, virtchnl2_rss_key);
@ -1131,7 +1131,7 @@ VIRTCHNL2_CHECK_STRUCT_LEN(16, virtchnl2_queue_chunk);
struct virtchnl2_queue_chunks {
__le16 num_chunks;
u8 pad[6];
struct virtchnl2_queue_chunk chunks[];
struct virtchnl2_queue_chunk chunks[] __counted_by_le(num_chunks);
};
VIRTCHNL2_CHECK_STRUCT_LEN(8, virtchnl2_queue_chunks);
@ -1195,7 +1195,7 @@ struct virtchnl2_queue_vector_maps {
__le32 vport_id;
__le16 num_qv_maps;
u8 pad[10];
struct virtchnl2_queue_vector qv_maps[];
struct virtchnl2_queue_vector qv_maps[] __counted_by_le(num_qv_maps);
};
VIRTCHNL2_CHECK_STRUCT_LEN(16, virtchnl2_queue_vector_maps);
@ -1247,7 +1247,7 @@ struct virtchnl2_mac_addr_list {
__le32 vport_id;
__le16 num_mac_addr;
u8 pad[2];
struct virtchnl2_mac_addr mac_addr_list[];
struct virtchnl2_mac_addr mac_addr_list[] __counted_by_le(num_mac_addr);
};
VIRTCHNL2_CHECK_STRUCT_LEN(8, virtchnl2_mac_addr_list);