diff options
| author | Jason Xing <kernelxing@tencent.com> | 2024-03-04 11:20:46 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-15 17:48:21 +0300 |
| commit | 34cab94f7473e7b09f5205d4583fb5096cb63b5b (patch) | |
| tree | 3a6d1a27b12bcf1abdb00816cba3b5b10ae4d87d /net/netrom | |
| parent | db364859ce68fb3a52d42cd87a54da3dc42dc1c8 (diff) | |
| download | linux-34cab94f7473e7b09f5205d4583fb5096cb63b5b.tar.xz | |
netrom: Fix data-races around sysctl_net_busy_read
[ Upstream commit d380ce70058a4ccddc3e5f5c2063165dc07672c6 ]
We need to protect the reader reading the sysctl value because the
value can be changed concurrently.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/netrom')
| -rw-r--r-- | net/netrom/af_netrom.c | 2 | ||||
| -rw-r--r-- | net/netrom/nr_in.c | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c index 8c69f0765125..f26dee48e03a 100644 --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -954,7 +954,7 @@ int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) * G8PZT's Xrouter which is sending packets with command type 7 * as an extension of the protocol. */ - if (sysctl_netrom_reset_circuit && + if (READ_ONCE(sysctl_netrom_reset_circuit) && (frametype != NR_RESET || flags != 0)) nr_transmit_reset(skb, 1); diff --git a/net/netrom/nr_in.c b/net/netrom/nr_in.c index 2f084b6f69d7..97944db6b5ac 100644 --- a/net/netrom/nr_in.c +++ b/net/netrom/nr_in.c @@ -97,7 +97,7 @@ static int nr_state1_machine(struct sock *sk, struct sk_buff *skb, break; case NR_RESET: - if (sysctl_netrom_reset_circuit) + if (READ_ONCE(sysctl_netrom_reset_circuit)) nr_disconnect(sk, ECONNRESET); break; @@ -128,7 +128,7 @@ static int nr_state2_machine(struct sock *sk, struct sk_buff *skb, break; case NR_RESET: - if (sysctl_netrom_reset_circuit) + if (READ_ONCE(sysctl_netrom_reset_circuit)) nr_disconnect(sk, ECONNRESET); break; @@ -262,7 +262,7 @@ static int nr_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype break; case NR_RESET: - if (sysctl_netrom_reset_circuit) + if (READ_ONCE(sysctl_netrom_reset_circuit)) nr_disconnect(sk, ECONNRESET); break; |