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dlm: use kernel_connect() and kernel_bind()

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[ Upstream commit e9cdebbe23 ]

Recent changes to kernel_connect() and kernel_bind() ensure that
callers are insulated from changes to the address parameter made by BPF
SOCK_ADDR hooks. This patch wraps direct calls to ops->connect() and
ops->bind() with kernel_connect() and kernel_bind() to protect callers
in such cases.

Link: https://lore.kernel.org/netdev/9944248dba1bce861375fcce9de663934d933ba9.camel@redhat.com/
Fixes: d74bad4e74 ("bpf: Hooks for sys_connect")
Fixes: 4fbac77d2d ("bpf: Hooks for sys_bind")
Cc: stable@vger.kernel.org
Signed-off-by: Jordan Rife <jrife@google.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jordan Rife 2023-11-06 15:24:38 -06:00 committed by Greg Kroah-Hartman
parent fd7c2ffa0e
commit e11dea8f50
1 changed files with 7 additions and 7 deletions
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14
fs/dlm/lowcomms.c
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@ -1845,8 +1845,8 @@ static int dlm_tcp_bind(struct socket *sock)
memcpy(&src_addr, dlm_local_addr[0], sizeof(src_addr));
make_sockaddr(&src_addr, 0, &addr_len);
result = sock->ops->bind(sock, (struct sockaddr *)&src_addr,
addr_len);
result = kernel_bind(sock, (struct sockaddr *)&src_addr,
addr_len);
if (result < 0) {
/* This *may* not indicate a critical error */
log_print("could not bind for connect: %d", result);
@ -1860,7 +1860,7 @@ static int dlm_tcp_connect(struct connection *con, struct socket *sock,
{
int ret;
ret = sock->ops->connect(sock, addr, addr_len, O_NONBLOCK);
ret = kernel_connect(sock, addr, addr_len, O_NONBLOCK);
switch (ret) {
case -EINPROGRESS:
fallthrough;
@ -1900,8 +1900,8 @@ static int dlm_tcp_listen_bind(struct socket *sock)
/* Bind to our port */
make_sockaddr(dlm_local_addr[0], dlm_config.ci_tcp_port, &addr_len);
return sock->ops->bind(sock, (struct sockaddr *)dlm_local_addr[0],
addr_len);
return kernel_bind(sock, (struct sockaddr *)&dlm_local_addr[0],
addr_len);
}
static const struct dlm_proto_ops dlm_tcp_ops = {
@ -1928,12 +1928,12 @@ static int dlm_sctp_connect(struct connection *con, struct socket *sock,
int ret;
/*
* Make sock->ops->connect() function return in specified time,
* Make kernel_connect() function return in specified time,
* since O_NONBLOCK argument in connect() function does not work here,
* then, we should restore the default value of this attribute.
*/
sock_set_sndtimeo(sock->sk, 5);
ret = sock->ops->connect(sock, addr, addr_len, 0);
ret = kernel_connect(sock, addr, addr_len, 0);
sock_set_sndtimeo(sock->sk, 0);
if (ret < 0)
return ret;