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authorCong Wang <xiyou.wangcong@gmail.com>2017-10-25 01:30:37 +0300
committerDavid S. Miller <davem@davemloft.net>2017-10-26 11:45:58 +0300
commitc1eef220c1760762753b602c382127bfccee226d (patch)
treee2a603686a2f0957a209cc553055b0364cbed72a /net/vmw_vsock/af_vsock.c
parent3c91b0c1de8d013490bbc41ce9ee8810ea5baddd (diff)
downloadlinux-c1eef220c1760762753b602c382127bfccee226d.tar.xz
vsock: always call vsock_init_tables()
Although CONFIG_VSOCKETS_DIAG depends on CONFIG_VSOCKETS, vsock_init_tables() is not always called, it is called only if other modules call its caller. Therefore if we only enable CONFIG_VSOCKETS_DIAG, it would crash kernel on uninitialized vsock_bind_table. This patch fixes it by moving vsock_init_tables() to its own module_init(). Fixes: 413a4317aca7 ("VSOCK: add sock_diag interface") Reported-by: syzkaller bot Cc: Stefan Hajnoczi <stefanha@redhat.com> Cc: Jorgen Hansen <jhansen@vmware.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/vmw_vsock/af_vsock.c')
-rw-r--r--net/vmw_vsock/af_vsock.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 98359c19522f..5d28abf87fbf 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -195,7 +195,7 @@ static int vsock_auto_bind(struct vsock_sock *vsk)
return __vsock_bind(sk, &local_addr);
}
-static void vsock_init_tables(void)
+static int __init vsock_init_tables(void)
{
int i;
@@ -204,6 +204,7 @@ static void vsock_init_tables(void)
for (i = 0; i < ARRAY_SIZE(vsock_connected_table); i++)
INIT_LIST_HEAD(&vsock_connected_table[i]);
+ return 0;
}
static void __vsock_insert_bound(struct list_head *list,
@@ -1957,8 +1958,6 @@ int __vsock_core_init(const struct vsock_transport *t, struct module *owner)
vsock_proto.owner = owner;
transport = t;
- vsock_init_tables();
-
vsock_device.minor = MISC_DYNAMIC_MINOR;
err = misc_register(&vsock_device);
if (err) {
@@ -2019,6 +2018,8 @@ const struct vsock_transport *vsock_core_get_transport(void)
}
EXPORT_SYMBOL_GPL(vsock_core_get_transport);
+module_init(vsock_init_tables);
+
MODULE_AUTHOR("VMware, Inc.");
MODULE_DESCRIPTION("VMware Virtual Socket Family");
MODULE_VERSION("1.0.2.0-k");