diff options
| author | Alex Shi <alex.shi@linaro.org> | 2017-11-26 12:03:19 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2017-11-26 12:03:19 +0800 |
| commit | d8e6d09cfa7260b12501ce94ca35977be998d4a7 (patch) | |
| tree | 1fe3a34e78b5978fe95fb6ba96f7d070778d5c7a /net/netlink/af_netlink.c | |
| parent | c0426ccf530144f8af2e68165aa10cc52cd8f803 (diff) | |
| parent | 29ffb9c1fb4acbda207985ad1558191ffb776bee (diff) | |
Merge tag 'v4.4.102' into linux-linaro-lsk-v4.4lsk-v4.4-17.11
This is the 4.4.102 stable release
Diffstat (limited to 'net/netlink/af_netlink.c')
| -rw-r--r-- | net/netlink/af_netlink.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index acfb16fdcd55..9ecdd61c6463 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -2077,7 +2077,7 @@ static int netlink_dump(struct sock *sk) struct sk_buff *skb = NULL; struct nlmsghdr *nlh; struct module *module; - int len, err = -ENOBUFS; + int err = -ENOBUFS; int alloc_min_size; int alloc_size; @@ -2125,9 +2125,11 @@ static int netlink_dump(struct sock *sk) skb_reserve(skb, skb_tailroom(skb) - alloc_size); netlink_skb_set_owner_r(skb, sk); - len = cb->dump(skb, cb); + if (nlk->dump_done_errno > 0) + nlk->dump_done_errno = cb->dump(skb, cb); - if (len > 0) { + if (nlk->dump_done_errno > 0 || + skb_tailroom(skb) < nlmsg_total_size(sizeof(nlk->dump_done_errno))) { mutex_unlock(nlk->cb_mutex); if (sk_filter(sk, skb)) @@ -2137,13 +2139,15 @@ static int netlink_dump(struct sock *sk) return 0; } - nlh = nlmsg_put_answer(skb, cb, NLMSG_DONE, sizeof(len), NLM_F_MULTI); - if (!nlh) + nlh = nlmsg_put_answer(skb, cb, NLMSG_DONE, + sizeof(nlk->dump_done_errno), NLM_F_MULTI); + if (WARN_ON(!nlh)) goto errout_skb; nl_dump_check_consistent(cb, nlh); - memcpy(nlmsg_data(nlh), &len, sizeof(len)); + memcpy(nlmsg_data(nlh), &nlk->dump_done_errno, + sizeof(nlk->dump_done_errno)); if (sk_filter(sk, skb)) kfree_skb(skb); @@ -2208,6 +2212,7 @@ int __netlink_dump_start(struct sock *ssk, struct sk_buff *skb, cb->skb = skb; nlk->cb_running = true; + nlk->dump_done_errno = INT_MAX; mutex_unlock(nlk->cb_mutex); |