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authorMatt Johnston <matt@codeconstruct.com.au>2022-02-22 05:17:39 +0100
committerDavid S. Miller <davem@davemloft.net>2022-02-23 13:29:15 +0100
commite297db3eadd7809170aea627ed3d9f714fa3da2d (patch)
tree6a9568db1997af1cf933d8c1c92cb1053e0c7505 /net/mctp
parentmctp: make __mctp_dev_get() take a refcount hold (diff)
downloadlinux-e297db3eadd7809170aea627ed3d9f714fa3da2d.tar.xz
linux-e297db3eadd7809170aea627ed3d9f714fa3da2d.zip
mctp: Fix incorrect netdev unref for extended addr
In the extended addressing local route output codepath dev_get_by_index_rcu() doesn't take a dev_hold() so we shouldn't dev_put(). Signed-off-by: Matt Johnston <matt@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mctp')
-rw-r--r--net/mctp/route.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/net/mctp/route.c b/net/mctp/route.c
index 6f277e56b168..5078ce3315cf 100644
--- a/net/mctp/route.c
+++ b/net/mctp/route.c
@@ -838,7 +838,6 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
struct mctp_skb_cb *cb = mctp_cb(skb);
struct mctp_route tmp_rt = {0};
struct mctp_sk_key *key;
- struct net_device *dev;
struct mctp_hdr *hdr;
unsigned long flags;
unsigned int mtu;
@@ -851,12 +850,12 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
if (rt) {
ext_rt = false;
- dev = NULL;
-
if (WARN_ON(!rt->dev))
goto out_release;
} else if (cb->ifindex) {
+ struct net_device *dev;
+
ext_rt = true;
rt = &tmp_rt;
@@ -866,7 +865,6 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
rcu_read_unlock();
return rc;
}
-
rt->dev = __mctp_dev_get(dev);
rcu_read_unlock();
@@ -947,11 +945,9 @@ out_release:
if (!ext_rt)
mctp_route_release(rt);
- dev_put(dev);
mctp_dev_put(tmp_rt.dev);
return rc;
-
}
/* route management */