From: Eric Dumazet <edumazet@google.com>
Date: Fri, 21 Nov 2014 19:47:16 +0000 (-0800)
Subject: net: Revert "net: avoid one atomic operation in skb_clone()"
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~83^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7820e39b7d19b9fe1928fc19de9361b44150ca6;p=pandora-kernel.git

net: Revert "net: avoid one atomic operation in skb_clone()"

Not sure what I was thinking, but doing anything after
releasing a refcount is suicidal or/and embarrassing.

By the time we set skb->fclone to SKB_FCLONE_FREE, another cpu
could have released last reference and freed whole skb.

We potentially corrupt memory or trap if CONFIG_DEBUG_PAGEALLOC is set.

Reported-by: Chris Mason <clm@fb.com>
Fixes: ce1a4ea3f1258 ("net: avoid one atomic operation in skb_clone()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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