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Re: Re: [PATCH v2] net: fix null pointer dereference when parsing ICMP6_
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From: |
zhangqiumiao |
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Subject: |
Re: Re: [PATCH v2] net: fix null pointer dereference when parsing ICMP6_ROUTER_ADVERTISE messages |
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Date: |
Thu, 21 Apr 2022 13:56:35 +0000 |
On Thu, Apr 21, 2022 at 21:41:52PM +0800, Daniel Kiper wrote:
> On Sat, Apr 16, 2022 at 09:50:11AM +0800, Qiumiao Zhang via Grub-devel wrote:
> > During UEFI PXE boot in IPv6 network, if the DHCP server adopts
> > stateful automatic configuration, then the client receives a
> > ICMP6_ROUTER_ADVERTISE multicast message from the server. This may be
> > received without the interfaced having a configured network address,
> > so orig_inf will be null, which can lead to a null dereference when
> > creating the default route. Actually, in this case, the client obtains
> > the default route through DHCPv6 instead of RA messages. So if
> > orig_inf == NULL and route_inf == null, we should not set the default
> > route.
> >
> > Fixes bug: https://savannah.gnu.org/bugs/index.php?62072
> Missing "Signed-off-by: Qiumiao Zhang <zhangqiumiao1@huawei.com>" line.
> May I add it on behalf of you?
Yes, that's perfect.
> Otherwise Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Qiumiao