Re: kernels > v4.12 oops/crash with ipsec-traffic: bisected to b838d5e1c5b6e57b10ec8af2268824041e3ea911: ipv4: mark DST_NOGC and remove the operation of dst_free()

[Tobias Hommel]

On Mon, Sep 10, 2018 at 08:37:39AM +0200, Steffen Klassert wrote:
...
> The other thing I wonder about is why Tobias bisected this to
> 
> commit b838d5e1c5b6e57b10ec8af2268824041e3ea911
> ipv4: mark DST_NOGC and remove the operation of dst_free()
> 
> from 'Jun 17 2017' and not to
> 
> commit 222d7dbd258dad4cd5241c43ef818141fad5a87a
> net: prevent dst uses after free
> 
> from 'Sep 21 2017'.
> 
> Maybe Tobias has seen two bugs. Before
> ("net: prevent dst uses after free"), it was the
> use after free, and after this fix it was a NULL
> pointer derference of skb->dst.
> 
Uhm, yeah, I checked back, we actually had different bugs. My mistake, sorry
for the confusion.