Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

2019-02-14 Thread Michael Ellerman
Matt Corallo writes: > Hey, sorry for the delay on this. I had some apparently-unrelated > hangs that I believe were due to mpt3sas instability, and at the risk > of speaking too soon for a bug I couldn't reliably reproduce, this > patch appears to have resolved it, thanks! Thanks. For the

Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

2019-02-14 Thread Matt Corallo
Hey, sorry for the delay on this. I had some apparently-unrelated hangs that I believe were due to mpt3sas instability, and at the risk of speaking too soon for a bug I couldn't reliably reproduce, this patch appears to have resolved it, thanks! > On Jan 21, 2019, at 07:35, Aneesh Kumar K.V

Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

2019-01-21 Thread Aneesh Kumar K.V
Can you test this patch? >From e511e79af9a314854848ea8fda9dfa6d7e07c5e4 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Mon, 21 Jan 2019 16:43:17 +0530 Subject: [PATCH] arch/powerpc/radix: Fix kernel crash with mremap With support for split pmd lock, we use pmd page pmd_huge_pte

Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

2019-01-09 Thread Matt Corallo
It's normal daily usage on a workstation (TALOS 2). I've seen it at least twice, both times in rustc, though I've run rustc more times than I can count. Note that the program that triggered it was running in lxc and it only happened after upgrading to 4.19. > On Jan 9, 2019, at 06:50, Aneesh

Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

2019-01-09 Thread Aneesh Kumar K.V
Matt Corallo writes: > .config follows. I have not tested with 64K pages as, sadly, I have a > large BTRFS volume that was formatted on x86, and am thus stuck with 4K > pages. Note that this is roughly the Debian kernel, so it has whatever > patches Debian defaults to applying, a list of

Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

2019-01-07 Thread Aneesh Kumar K.V
Andrew Morton writes: > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). > > On Fri, 04 Jan 2019 22:49:52 + bugzilla-dae...@bugzilla.kernel.org wrote: > >> https://bugzilla.kernel.org/show_bug.cgi?id=202149 >> >> Bug ID: 202149

Re: [Bug 202149] New: NULL Pointer Dereference in __split_huge_pmd on PPC64LE

2019-01-04 Thread Andrew Morton
(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Fri, 04 Jan 2019 22:49:52 + bugzilla-dae...@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=202149 > > Bug ID: 202149 >Summary: NULL Pointer