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Date: Wed, 15 Nov 2017 12:29:19 +0100 From: Steffen Klassert <steffen.klassert@...unet.com> To: Herbert Xu <herbert@...dor.apana.org.au> CC: Dmitry Vyukov <dvyukov@...gle.com>, syzbot <bot+413384116f7f7dab7903d54c53fc4af6a4441965@...kaller.appspotmail.com>, David Miller <davem@...emloft.net>, LKML <linux-kernel@...r.kernel.org>, netdev <netdev@...r.kernel.org>, <syzkaller-bugs@...glegroups.com> Subject: Re: kernel BUG at net/key/af_key.c:LINE! On Fri, Nov 10, 2017 at 02:14:06PM +1100, Herbert Xu wrote: > On Fri, Nov 10, 2017 at 01:30:38PM +1100, Herbert Xu wrote: > > > > I found the problem. This crap is coming from clone_policy. Now > > let me where this code came from. > > ---8<--- > Subject: xfrm: Copy policy family in clone_policy > > The syzbot found an ancient bug in the IPsec code. When we cloned > a socket policy (for example, for a child TCP socket derived from a > listening socket), we did not copy the family field. This results > in a live policy with a zero family field. This triggers a BUG_ON > check in the af_key code when the cloned policy is retrieved. > > This patch fixes it by copying the family field over. > > Reported-by: syzbot <syzkaller@...glegroups.com> > Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au> Patch applied, thanks Herbert!
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