switchdev: remove pointers from switchdev objects

When object is used in deferred work, we cannot use pointers in
switchdev object structures because the memory they point at may be already
used by someone else. So rather do local copy of the value.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 4 deletions

diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 007b8f40df06..5963d7ac1026 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -15,6 +15,7 @@
 #include <linux/mutex.h>
 #include <linux/notifier.h>
 #include <linux/netdevice.h>
+#include <linux/etherdevice.h>
 #include <linux/if_bridge.h>
 #include <linux/list.h>
 #include <linux/workqueue.h>
@@ -891,10 +892,10 @@ int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 {
         struct switchdev_obj_port_fdb fdb = {
                 .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
-                .addr = addr,
                 .vid = vid,
         };
 
+        ether_addr_copy(fdb.addr, addr);
         return switchdev_port_obj_add(dev, &fdb.obj);
 }
 EXPORT_SYMBOL_GPL(switchdev_port_fdb_add);
@@ -916,10 +917,10 @@ int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 {
         struct switchdev_obj_port_fdb fdb = {
                 .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
-                .addr = addr,
                 .vid = vid,
         };
 
+        ether_addr_copy(fdb.addr, addr);
         return switchdev_port_obj_del(dev, &fdb.obj);
 }
 EXPORT_SYMBOL_GPL(switchdev_port_fdb_del);
@@ -1081,7 +1082,6 @@ int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
                 .obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
                 .dst = dst,
                 .dst_len = dst_len,
-                .fi = fi,
                 .tos = tos,
                 .type = type,
                 .nlflags = nlflags,
@@ -1090,6 +1090,8 @@ int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
         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.
          */
@@ -1133,7 +1135,6 @@ int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
                 .obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
                 .dst = dst,
                 .dst_len = dst_len,
-                .fi = fi,
                 .tos = tos,
                 .type = type,
                 .nlflags = 0,
@@ -1142,6 +1143,8 @@ int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
         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;