Messages in this thread | | | Subject | Re: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0 | From | Eric Dumazet <> | Date | Wed, 23 Jun 2010 19:29:27 +0200 |
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Le mercredi 23 juin 2010 à 10:00 -0700, Justin P. Mattock a écrit : > o.k. the bisect is pointing to the below results.. > (I tried git revert xxx but this commit is too big > so I'll(hopefully)manually revert it on the latest HEAD to > see if this is the actual problem im experiencing) > > > > 80c802f3073e84c956846e921e8a0b02dfa3755f is the first bad commit > commit 80c802f3073e84c956846e921e8a0b02dfa3755f > Author: Timo Teräs <timo.teras@iki.fi> > Date: Wed Apr 7 00:30:05 2010 +0000 > > xfrm: cache bundles instead of policies for outgoing flows > > __xfrm_lookup() is called for each packet transmitted out of > system. The xfrm_find_bundle() does a linear search which can > kill system performance depending on how many bundles are > required per policy. > > This modifies __xfrm_lookup() to store bundles directly in > the flow cache. If we did not get a hit, we just create a new > bundle instead of doing slow search. This means that we can now > get multiple xfrm_dst's for same flow (on per-cpu basis). > > Signed-off-by: Timo Teras <timo.teras@iki.fi> > Signed-off-by: David S. Miller <davem@davemloft.net> > > :040000 040000 d8e60f5fa4c1329f450d9c7cdf98b34e6a177f22 > 9f576e68e5bf4ce357d7f0305aee5f410250dfe2 M include > :040000 040000 f2876df688ee36907af7b4123eea96592faaed3e > a3f6f6f94f0309106856cd99b38ec90b024eb016 M net > >
Thanks a lot for bisecting Jutin, this is really appreciated.
crash is in xfrm_bundle_ok()
if (xdst->policy_genid != atomic_read(&xdst->pols[0]->genid)) return 0;
xdst->pols[0] contains a NULL pointer
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