From c889a99a21bf124c3db08d09df919f0eccc5ea4c Mon Sep 17 00:00:00 2001 From: Jordan Rife Date: Thu, 21 Sep 2023 18:46:42 -0500 Subject: net: prevent address rewrite in kernel_bind() Similar to the change in commit 0bdf399342c5("net: Avoid address overwrite in kernel_connect"), BPF hooks run on bind may rewrite the address passed to kernel_bind(). This change 1) Makes a copy of the bind address in kernel_bind() to insulate callers. 2) Replaces direct calls to sock->ops->bind() in net with kernel_bind() Link: https://lore.kernel.org/netdev/20230912013332.2048422-1-jrife@google.com/ Fixes: 4fbac77d2d09 ("bpf: Hooks for sys_bind") Cc: stable@vger.kernel.org Reviewed-by: Willem de Bruijn Signed-off-by: Jordan Rife Reviewed-by: Simon Horman Signed-off-by: David S. Miller --- net/rds/tcp_connect.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/rds/tcp_connect.c') diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c index d788c6d28986..a0046e99d6df 100644 --- a/net/rds/tcp_connect.c +++ b/net/rds/tcp_connect.c @@ -145,7 +145,7 @@ int rds_tcp_conn_path_connect(struct rds_conn_path *cp) addrlen = sizeof(sin); } - ret = sock->ops->bind(sock, addr, addrlen); + ret = kernel_bind(sock, addr, addrlen); if (ret) { rdsdebug("bind failed with %d at address %pI6c\n", ret, &conn->c_laddr); -- cgit v1.2.3