Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

Hi Josh, On Mon, Oct 02, 2017 at 04:31:09PM -0500, Josh Poimboeuf wrote: On Mon, Oct 02, 2017 at 04:26:54PM -0500, Josh Poimboeuf wrote: Fengguang, assuming it's reliably recreatable, any chance you could recreate with the following patch? Sorry, here's a version which actually compiles.

Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

On Tue, Oct 03, 2017 at 11:45:38AM +0800, Fengguang Wu wrote: > Hi Josh, > > On Mon, Oct 02, 2017 at 04:31:09PM -0500, Josh Poimboeuf wrote: > > On Mon, Oct 02, 2017 at 04:26:54PM -0500, Josh Poimboeuf wrote: > > > Fengguang, assuming it's reliably recreatable, any chance you could > > > recreate

Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

Hi Josh, On Mon, Oct 02, 2017 at 04:31:09PM -0500, Josh Poimboeuf wrote: On Mon, Oct 02, 2017 at 04:26:54PM -0500, Josh Poimboeuf wrote: Fengguang, assuming it's reliably recreatable, any chance you could recreate with the following patch? Sure, I'll try your patch on v4.14-rc3 since it

Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

On Mon, Oct 02, 2017 at 02:58:08PM -0700, Linus Torvalds wrote: > On Mon, Oct 2, 2017 at 2:26 PM, Josh Poimboeuf wrote: > > > > The bisect is pointing to a commit which is almost 5 months old, so this > > is pre-ORC. Kallsyms *is* enabled, but the unwinder dump isn't smart >

Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

On Mon, Oct 2, 2017 at 2:26 PM, Josh Poimboeuf wrote: > > The bisect is pointing to a commit which is almost 5 months old, so this > is pre-ORC. Kallsyms *is* enabled, but the unwinder dump isn't smart > enough to realize it's dumping misaligned stack addresses: Ahh, I

Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

On Mon, Oct 02, 2017 at 04:26:54PM -0500, Josh Poimboeuf wrote: > Fengguang, assuming it's reliably recreatable, any chance you could > recreate with the following patch? Sorry, here's a version which actually compiles. diff --git a/arch/x86/kernel/unwind_frame.c b/arch/x86/kernel/unwind_frame.c

Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

On Mon, Oct 02, 2017 at 01:09:31PM -0700, Linus Torvalds wrote: > Bringing in Josh on this, because the merge commit gets fingered > because it seems to be an interaction between the new code from the > merge and the ORC unwinder changes. It's probably some almost trivial > code difference that

Re: 4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

Bringing in Josh on this, because the merge commit gets fingered because it seems to be an interaction between the new code from the merge and the ORC unwinder changes. It's probably some almost trivial code difference that just causes some code generation to change. And because Josh wasn't

4879b7ae05 ("Merge tag 'dmaengine-4.12-rc1' of .."): WARNING: kernel stack regs at bd92bc2e in 01-cpu-hotplug:3811 has bad 'bp' value 000001be

Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master commit 4879b7ae05431ebcd228a4ff25a81120b3d85891 Merge: ecc721a72c121 be13ec668d043 Author: Linus Torvalds