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| author | Jiri Pirko <jiri@mellanox.com> | 2016-05-17 18:58:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-24 10:18:16 -0700 |
| commit | 835d0122a57ffaea43162d0e7a4f5bf25d2af78b (patch) | |
| tree | 6ac2447552cf93568d82b65bc69394940776b669 | |
| parent | 6a58f3e12e8e5c330940b38cc8c98d52171aefa8 (diff) | |
| download | lwn-835d0122a57ffaea43162d0e7a4f5bf25d2af78b.tar.gz lwn-835d0122a57ffaea43162d0e7a4f5bf25d2af78b.zip | |
switchdev: pass pointer to fib_info instead of copy
[ Upstream commit da4ed55165d41b1073f9a476f1c18493e9bf8c8e ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/rocker/rocker.c | 4 | ||||
| -rw-r--r-- | include/net/switchdev.h | 2 | ||||
| -rw-r--r-- | net/switchdev/switchdev.c | 6 |
3 files changed, 5 insertions, 7 deletions
diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c index 2b34622a4bfe..3920c3eb6006 100644 --- a/drivers/net/ethernet/rocker/rocker.c +++ b/drivers/net/ethernet/rocker/rocker.c @@ -4475,7 +4475,7 @@ static int rocker_port_obj_add(struct net_device *dev, fib4 = SWITCHDEV_OBJ_IPV4_FIB(obj); err = rocker_port_fib_ipv4(rocker_port, trans, htonl(fib4->dst), fib4->dst_len, - &fib4->fi, fib4->tb_id, 0); + fib4->fi, fib4->tb_id, 0); break; case SWITCHDEV_OBJ_ID_PORT_FDB: err = rocker_port_fdb_add(rocker_port, trans, @@ -4547,7 +4547,7 @@ static int rocker_port_obj_del(struct net_device *dev, fib4 = SWITCHDEV_OBJ_IPV4_FIB(obj); err = rocker_port_fib_ipv4(rocker_port, NULL, htonl(fib4->dst), fib4->dst_len, - &fib4->fi, fib4->tb_id, + fib4->fi, fib4->tb_id, ROCKER_OP_FLAG_REMOVE); break; case SWITCHDEV_OBJ_ID_PORT_FDB: diff --git a/include/net/switchdev.h b/include/net/switchdev.h index 1d22ce9f352e..31d0e5143848 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -88,7 +88,7 @@ struct switchdev_obj_ipv4_fib { 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 d5d7132ac847..1b58866175e6 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -1169,6 +1169,7 @@ 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, @@ -1177,8 +1178,6 @@ 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. */ @@ -1222,6 +1221,7 @@ 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, @@ -1230,8 +1230,6 @@ 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; |