switchdev: pass pointer to fib_info instead of copy
The problem is that fib_info->nh is [0] so the struct fib_info
allocation size depends on number of nexthops. If we just copy fib_info,
we do not copy the nexthops info and driver accesses memory which is not
ours.
Given the fact that fib4 does not defer operations and therefore it does
not need copy, just pass the pointer down to drivers as it was done
before.
Fixes: 850d0cbc91 ("switchdev: remove pointers from switchdev objects")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/rocker/rocker_ofdpa.c b/drivers/net/ethernet/rocker/rocker_ofdpa.c
index 0e758bc..1ca7963 100644
--- a/drivers/net/ethernet/rocker/rocker_ofdpa.c
+++ b/drivers/net/ethernet/rocker/rocker_ofdpa.c
@@ -2727,7 +2727,7 @@
return ofdpa_port_fib_ipv4(ofdpa_port, trans,
htonl(fib4->dst), fib4->dst_len,
- &fib4->fi, fib4->tb_id, 0);
+ fib4->fi, fib4->tb_id, 0);
}
static int ofdpa_port_obj_fib4_del(struct rocker_port *rocker_port,
@@ -2737,7 +2737,7 @@
return ofdpa_port_fib_ipv4(ofdpa_port, NULL,
htonl(fib4->dst), fib4->dst_len,
- &fib4->fi, fib4->tb_id,
+ fib4->fi, fib4->tb_id,
OFDPA_OP_FLAG_REMOVE);
}
diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 51d77b2..985619a 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -97,7 +97,7 @@
struct switchdev_obj obj;
u32 dst;
int dst_len;
- struct fib_info fi;
+ struct fib_info *fi;
u8 tos;
u8 type;
u32 nlflags;
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index b7e01d8..59658b2 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -1188,6 +1188,7 @@
.obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
.dst = dst,
.dst_len = dst_len,
+ .fi = fi,
.tos = tos,
.type = type,
.nlflags = nlflags,
@@ -1196,8 +1197,6 @@
struct net_device *dev;
int err = 0;
- memcpy(&ipv4_fib.fi, fi, sizeof(ipv4_fib.fi));
-
/* Don't offload route if using custom ip rules or if
* IPv4 FIB offloading has been disabled completely.
*/
@@ -1242,6 +1241,7 @@
.obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
.dst = dst,
.dst_len = dst_len,
+ .fi = fi,
.tos = tos,
.type = type,
.nlflags = 0,
@@ -1250,8 +1250,6 @@
struct net_device *dev;
int err = 0;
- memcpy(&ipv4_fib.fi, fi, sizeof(ipv4_fib.fi));
-
if (!(fi->fib_flags & RTNH_F_OFFLOAD))
return 0;