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Message-Id: <20221118215847.never.416-kees@kernel.org>
Date: Fri, 18 Nov 2022 13:58:51 -0800
From: Kees Cook <keescook@...omium.org>
To: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>
Cc: Kees Cook <keescook@...omium.org>, Jason Gunthorpe <jgg@...pe.ca>,
Leon Romanovsky <leon@...nel.org>, cgel.zte@...il.com,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-hardening@...r.kernel.org
Subject: [PATCH] IB/hfi1: Replace 1-element array with singleton
Zero-length arrays are deprecated[1] and are being replaced with
flexible array members in support of the ongoing efforts to tighten the
FORTIFY_SOURCE routines on memcpy(), correctly instrument array indexing
with UBSAN_BOUNDS, and to globally enable -fstrict-flex-arrays=3.
Replace zero-length array with flexible-array member "lvs" in struct
opa_port_data_counters_msg and struct opa_port_error_counters64_msg.
Additionally, the "port" member of several structs is defined as a
single-element, but is only ever accessed at index 0. Replace it with a
singleton so that flexible array usage is sane.
This results in no differences in binary output.
[1] https://github.com/KSPP/linux/issues/78
Cc: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Cc: Leon Romanovsky <leon@...nel.org>
Cc: cgel.zte@...il.com
Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: linux-rdma@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
drivers/infiniband/hw/hfi1/mad.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
index 4146a2113a95..e5e783c45810 100644
--- a/drivers/infiniband/hw/hfi1/mad.c
+++ b/drivers/infiniband/hw/hfi1/mad.c
@@ -2437,9 +2437,9 @@ struct opa_port_data_counters_msg {
__be64 port_vl_xmit_wait_data;
__be64 port_vl_rcv_bubble;
__be64 port_vl_mark_fecn;
- } vls[0];
+ } vls[];
/* array size defined by #bits set in vl_select_mask*/
- } port[1]; /* array size defined by #ports in attribute modifier */
+ } port;
};
struct opa_port_error_counters64_msg {
@@ -2470,9 +2470,9 @@ struct opa_port_error_counters64_msg {
u8 reserved3[7];
struct _vls_ectrs {
__be64 port_vl_xmit_discards;
- } vls[0];
+ } vls[];
/* array size defined by #bits set in vl_select_mask */
- } port[1]; /* array size defined by #ports in attribute modifier */
+ } port;
};
struct opa_port_error_info_msg {
@@ -2543,7 +2543,7 @@ struct opa_port_error_info_msg {
u8 error_info;
} __packed fm_config_ei;
__u32 reserved9;
- } port[1]; /* actual array size defined by #ports in attr modifier */
+ } port;
};
/* opa_port_error_info_msg error_info_select_mask bit definitions */
@@ -2966,7 +2966,7 @@ static int pma_get_opa_datacounters(struct opa_pma_mad *pmp,
}
/* Sanity check */
- response_data_size = struct_size(req, port[0].vls, num_vls);
+ response_data_size = struct_size(req, port.vls, num_vls);
if (response_data_size > sizeof(pmp->data)) {
pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
@@ -2986,7 +2986,7 @@ static int pma_get_opa_datacounters(struct opa_pma_mad *pmp,
return reply((struct ib_mad_hdr *)pmp);
}
- rsp = &req->port[0];
+ rsp = &req->port;
memset(rsp, 0, sizeof(*rsp));
rsp->port_number = port;
@@ -3182,7 +3182,7 @@ static int pma_get_opa_porterrors(struct opa_pma_mad *pmp,
return reply((struct ib_mad_hdr *)pmp);
}
- response_data_size = struct_size(req, port[0].vls, num_vls);
+ response_data_size = struct_size(req, port.vls, num_vls);
if (response_data_size > sizeof(pmp->data)) {
pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
@@ -3201,7 +3201,7 @@ static int pma_get_opa_porterrors(struct opa_pma_mad *pmp,
return reply((struct ib_mad_hdr *)pmp);
}
- rsp = &req->port[0];
+ rsp = &req->port;
ibp = to_iport(ibdev, port_num);
ppd = ppd_from_ibp(ibp);
@@ -3340,7 +3340,7 @@ static int pma_get_opa_errorinfo(struct opa_pma_mad *pmp,
u64 reg;
req = (struct opa_port_error_info_msg *)pmp->data;
- rsp = &req->port[0];
+ rsp = &req->port;
num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
@@ -3590,7 +3590,7 @@ static int pma_set_opa_errorinfo(struct opa_pma_mad *pmp,
u32 error_info_select;
req = (struct opa_port_error_info_msg *)pmp->data;
- rsp = &req->port[0];
+ rsp = &req->port;
num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
--
2.34.1
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