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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-18 10:26:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-20 10:14:49 +0100 |
| commit | 3d72bb4188c708bb16758c60822fc4dda7a95174 (patch) | |
| tree | f799bca36a06cccad7bc3b26c6bd645b01e9aac6 /include | |
| parent | 9b55c20f83369dd54541d9ddbe3a018a8377f451 (diff) | |
| download | linux-3d72bb4188c708bb16758c60822fc4dda7a95174.tar.bz2 | |
udp: Fix a data-race around sysctl_udp_l3mdev_accept.
While reading sysctl_udp_l3mdev_accept, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: 63a6fff353d0 ("net: Avoid receiving packets with an l3mdev on unbound UDP sockets")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/udp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/udp.h b/include/net/udp.h index bb4c227299cc..8dd4aa1485a6 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -238,7 +238,7 @@ static inline bool udp_sk_bound_dev_eq(struct net *net, int bound_dev_if, int dif, int sdif) { #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) - return inet_bound_dev_eq(!!net->ipv4.sysctl_udp_l3mdev_accept, + return inet_bound_dev_eq(!!READ_ONCE(net->ipv4.sysctl_udp_l3mdev_accept), bound_dev_if, dif, sdif); #else return inet_bound_dev_eq(true, bound_dev_if, dif, sdif); |