From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 197861] Shutting down a VM with Kernel 4.14 will sometime hang
and a reboot is the only way to recover.
Date: Tue, 12 Dec 2017 22:25:48 +0000
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--- Comment #7 from Willem de Bruijn (willemb@google.com) ---
If that fixes it, the output with this patch would be informative.
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index a95877a8ac8b..7c4ba11cb429 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -941,8 +941,14 @@ int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask)
if (!num_frags)
return 0;
- if (skb_shared(skb) || skb_unclone(skb, gfp_mask))
+ if (skb_shared(skb)) {
+ WARN_ONCE(1, "shared skb");
return -EINVAL;
+ }
+ if (skb_unclone(skb, gfp_mask)) {
+ WARN_ONCE(1, "cloned skb");
+ return -EINVAL;
+ }
--
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