On Tue, Mar 08, 2016 at 02:42:01PM +0000, James Hogan wrote:
> On Tue, Mar 08, 2016 at 06:10:29AM -0800, Greg KH wrote:
> > On Tue, Mar 08, 2016 at 02:01:08PM +0000, James Hogan wrote:
> > > Hi Greg,
> > >
> > > On Mon, Mar 07, 2016 at 12:39:08PM -0800, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> > > >
> > > > The patch below does not apply to the 4.4-stable tree.
> > > > If someone wants it applied there, or to any other stable or longterm
> > > > tree, then please email the backport, including the original git commit
> > > > id to <stable@xxxxxxxxxxxxxxx>.
> > >
> > > I don't see any conflicts when this is applied to 4.4.4. Asside from the
> > > hashes the cherry-picked commit is identical. Is it conflicting with
> > > some other stable patch since then or something?
> >
> > Try using patch, not 'cherry-pick' and see if it still applies.
>
> $ git reset --hard HEAD~
> HEAD is now at c252409a688a Linux 4.4.4
> $ git show 887349f69f37e71e2a8bfbd743831625a0b2ff51 | patch -p1
> patching file arch/mips/kvm/mips.c
> $ git diff | cat
> diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
> index b9b803facdbf..2683d04fdda5 100644
> --- a/arch/mips/kvm/mips.c
> +++ b/arch/mips/kvm/mips.c
> @@ -702,7 +702,7 @@ static int kvm_mips_get_reg(struct kvm_vcpu *vcpu,
> } else if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U128) {
> void __user *uaddr = (void __user *)(long)reg->addr;
>
> - return copy_to_user(uaddr, vs, 16);
> + return copy_to_user(uaddr, vs, 16) ? -EFAULT : 0;
> } else {
> return -EINVAL;
> }
> @@ -732,7 +732,7 @@ static int kvm_mips_set_reg(struct kvm_vcpu *vcpu,
> } else if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U128) {
> void __user *uaddr = (void __user *)(long)reg->addr;
>
> - return copy_from_user(vs, uaddr, 16);
> + return copy_from_user(vs, uaddr, 16) ? -EFAULT : 0;
> } else {
> return -EINVAL;
> }
>
Fails for me:
~/linux/stable/linux-4.4.y $ git show 887349f69f37e71e2a8bfbd743831625a0b2ff51 | patch -p1
patching file arch/mips/kvm/mips.c
Reversed (or previously applied) patch detected! Assume -R? [n]
Apply anyway? [n]
Skipping patch.
2 out of 2 hunks ignored -- saving rejects to file arch/mips/kvm/mips.c.rej
Is this an issue with 4.4.5 perhaps?
Ah, do we have duplicate patches here? Look at commit
0178fd7dcc4451fcb90bec5e91226586962478d2 which is in 4.4.5 now, it's
this same patch...
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