From: Sasha Levin <sasha.levin@oracle.com>
Date: Sat, 13 Sep 2014 04:06:30 +0000 (-0400)
Subject: net: bpf: correctly handle errors in sk_attach_filter()
X-Git-Tag: omap-for-v3.19/prcm-cleanup~78^2~61
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0d1379a19c3dde3c32be50164997d246241c1e4;p=pandora-kernel.git

net: bpf: correctly handle errors in sk_attach_filter()

Commit "net: bpf: make eBPF interpreter images read-only" has changed bpf_prog
to be vmalloc()ed but never handled some of the errors paths of the old code.

On error within sk_attach_filter (which userspace can easily trigger), we'd
kfree() the vmalloc()ed memory, and leak the internal bpf_work_struct.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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