On Tue, 2015-08-11 at 21:56 -0700, David Miller wrote:
> Calling pskb_expand_head() with a shared SKB is absolutely,
> positively, a bug. You just don't understand why it is.
Definitely agree. Its a pain to find races otherwise.
skb_get() in general is quite tricky.
Better avoid it unless real
From: Linus Lüssing
Date: Tue, 11 Aug 2015 23:47:25 +0200
> On Tue, Aug 11, 2015 at 10:51:40PM +0200, Linus Lüssing wrote:
>> On Mon, Aug 10, 2015 at 02:56:12PM -0700, Brenden Blanco wrote:
>> > Doing some code reading with Alexei, we found a suspect commit, which
>> > introduces an skb_get and s
On Tue, Aug 11, 2015 at 11:47:25PM +0200, Linus Lüssing wrote:
> On Tue, Aug 11, 2015 at 10:51:40PM +0200, Linus Lüssing wrote:
> > On Mon, Aug 10, 2015 at 02:56:12PM -0700, Brenden Blanco wrote:
> > > Doing some code reading with Alexei, we found a suspect commit, which
> > > introduces an skb_get
On Tue, Aug 11, 2015 at 10:51:40PM +0200, Linus Lüssing wrote:
> On Mon, Aug 10, 2015 at 02:56:12PM -0700, Brenden Blanco wrote:
> > Doing some code reading with Alexei, we found a suspect commit, which
> > introduces an skb_get and skb_may_pull of the same skb, which leads to the
> > BUG
> > when
On Mon, Aug 10, 2015 at 02:56:12PM -0700, Brenden Blanco wrote:
> Doing some code reading with Alexei, we found a suspect commit, which
> introduces an skb_get and skb_may_pull of the same skb, which leads to the BUG
> when skb->len == len.
Urgh, didn't know that pskb_may_pull() doesn't like an sk
Hi folks,
Here is a crash that I am able to easily reproduce. The setup is:
2 VMs, running in libvirt (qemu-kvm)
CPU mode is host-passthrough, virtio drivers used wherever available
Disable ipv6 (just to limit the amount of multicast noise)
Set up a multicast vxlan tunnel between the two VMs
Atta
