From 6ea67769ff33018195e3ec2a610b8ecc03efe504 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Tue, 8 Oct 2019 13:01:51 +0200 Subject: [PATCH] net: tipc: prepare attrs in __tipc_nl_compat_dumpit() __tipc_nl_compat_dumpit() calls tipc_nl_publ_dump() which expects the attrs to be available by genl_dumpit_info(cb)->attrs. Add info struct and attr parsing in compat dumpit function. Reported-by: syzbot+8d37c50ffb0f52941a5e@syzkaller.appspotmail.com Fixes: 057af7071344 ("net: tipc: have genetlink code to parse the attrs during dumpit") Signed-off-by: Jiri Pirko Acked-by: Jon Maloy Signed-off-by: Jakub Kicinski --- net/tipc/netlink_compat.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c index 4950b754dacd..17a529739f8d 100644 --- a/net/tipc/netlink_compat.c +++ b/net/tipc/netlink_compat.c @@ -181,6 +181,7 @@ static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, struct tipc_nl_compat_msg *msg, struct sk_buff *arg) { + struct genl_dumpit_info info; int len = 0; int err; struct sk_buff *buf; @@ -191,6 +192,7 @@ static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, memset(&cb, 0, sizeof(cb)); cb.nlh = (struct nlmsghdr *)arg->data; cb.skb = arg; + cb.data = &info; buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!buf) @@ -209,6 +211,13 @@ static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, goto err_out; } + info.attrs = attrbuf; + err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf, + tipc_genl_family.maxattr, + tipc_genl_family.policy, NULL); + if (err) + goto err_out; + do { int rem; -- 2.30.2