6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jordan Rife jrife@google.com
commit e9cdebbe23f1aa9a1caea169862f479ab3fa2773 upstream.
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.came... Fixes: d74bad4e74ee ("bpf: Hooks for sys_connect") Fixes: 4fbac77d2d09 ("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: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/dlm/lowcomms.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
--- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -1805,8 +1805,8 @@ static int dlm_tcp_bind(struct socket *s 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); @@ -1818,7 +1818,7 @@ static int dlm_tcp_bind(struct socket *s static int dlm_tcp_connect(struct connection *con, struct socket *sock, struct sockaddr *addr, int addr_len) { - return sock->ops->connect(sock, addr, addr_len, O_NONBLOCK); + return kernel_connect(sock, addr, addr_len, O_NONBLOCK); }
static int dlm_tcp_listen_validate(void) @@ -1850,8 +1850,8 @@ static int dlm_tcp_listen_bind(struct so
/* 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 = { @@ -1876,12 +1876,12 @@ static int dlm_sctp_connect(struct conne 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); return ret; }