Mark Brown <broonie@xxxxxxxxxx> writes:
> Hi Eric,
>
> Yesterday's linux-next merge of the userns tree got a conflict in:
>
> arch/arm/mm/fault.c
>
> between commit:
>
> 8d9267cedb9e1d8edb8 ("ARM: spectre-v2: harden user aborts in kernel space")
>
> from the arm tree and commit:
>
> 3eb0f5193b497083391 ("signal: Ensure every siginfo we send has all bits initialized")
>
> from the userns tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
Mark. Did you get a bounce from this email?
I saw this when perusing lkml but I did not receive a copy of this
directly to myself.
Eric
> diff --cc arch/arm/mm/fault.c
> index 3b1ba003c4f9,32034543f49c..000000000000
> --- a/arch/arm/mm/fault.c
> +++ b/arch/arm/mm/fault.c
> @@@ -163,9 -163,8 +163,11 @@@ __do_user_fault(struct task_struct *tsk
> {
> struct siginfo si;
>
> + clear_siginfo(&si);
> +
> + if (addr > TASK_SIZE)
> + harden_branch_predictor();
> +
> #ifdef CONFIG_DEBUG_USER
> if (((user_debug & UDBG_SEGV) && (sig == SIGSEGV)) ||
> ((user_debug & UDBG_BUS) && (sig == SIGBUS))) {
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