[PATCH 1/2] KVM: PPC: e500: fix some NULL dereferences on error

Dan Carpenter dan.carpenter at oracle.com
Mon Jul 31 17:54:46 AEST 2017

On Mon, Jul 31, 2017 at 04:03:40PM +1000, Paul Mackerras wrote:
> On Thu, Jul 13, 2017 at 10:38:29AM +0300, Dan Carpenter wrote:
> > There are some error paths in kvmppc_core_vcpu_create_e500() where we
> > forget to set the error code.  It means that we return ERR_PTR(0) which
> > is NULL and it results in a NULL pointer dereference in the caller.
> > 
> > Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> Are these user-triggerable, and therefore needing to go into 4.13
> and be back-ported to the stable trees?  Or can they wait for 4.14?

These are static checker fixes...  I imagine that they might be user
triggerable with quite a bit of work but it's a only NULL derefence.

dan carpenter

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