lkml.org 
[lkml]   [2022]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v5 0/6] Fix some bugs related to ramp and dax
On Fri, Mar 18, 2022 at 03:45:23PM +0800, Muchun Song wrote:
> This series is based on next-20220225.
>
> Patch 1-2 fix a cache flush bug, because subsequent patches depend on
> those on those changes, there are placed in this series. Patch 3-4
> are preparation for fixing a dax bug in patch 5. Patch 6 is code cleanup
> since the previous patch remove the usage of follow_invalidate_pte().

Reverting this series fixed boot crashes.

KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
Mem abort info:
ESR = 0x96000004
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x04: level 0 translation fault
Data abort info:
ISV = 0, ISS = 0x00000004
CM = 0, WnR = 0
[dfff800000000003] address between user and kernel address ranges
Internal error: Oops: 96000004 [#1] PREEMPT SMP
Modules linked in: cdc_ether usbnet ipmi_devintf ipmi_msghandler cppc_cpufreq fuse ip_tables x_tables ipv6 btrfs blake2b_generic libcrc32c xor xor_neon raid6_pq zstd_compress dm_mod nouveau crct10dif_ce drm_ttm_helper mlx5_core ttm drm_dp_helper drm_kms_helper nvme mpt3sas nvme_core xhci_pci raid_class drm xhci_pci_renesas
CPU: 3 PID: 1707 Comm: systemd-udevd Not tainted 5.17.0-next-20220331-00004-g2d550916a6b9 #51
pstate: 104000c9 (nzcV daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire
lr : lock_acquire.part.0
sp : ffff800030a16fd0
x29: ffff800030a16fd0 x28: ffffdd876c4e9f90 x27: 0000000000000018
x26: 0000000000000000 x25: 0000000000000018 x24: 0000000000000000
x23: ffff08022beacf00 x22: ffffdd8772507660 x21: 0000000000000000
x20: 0000000000000000 x19: 0000000000000000 x18: ffffdd8772417d2c
x17: ffffdd876c5bc2e0 x16: 1fffe100457d5b06 x15: 0000000000000094
x14: 000000000000f1f1 x13: 00000000f3f3f3f3 x12: ffff08022beacf08
x11: 1ffffbb0ee482fa5 x10: ffffdd8772417d28 x9 : 0000000000000000
x8 : 0000000000000003 x7 : ffffdd876c4e9f90 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000003 x0 : dfff800000000000
Call trace:
__lock_acquire
lock_acquire.part.0
lock_acquire
_raw_spin_lock
page_vma_mapped_walk
try_to_migrate_one
rmap_walk_anon
try_to_migrate
__unmap_and_move
unmap_and_move
migrate_pages
migrate_misplaced_page
do_huge_pmd_numa_page
__handle_mm_fault
handle_mm_fault
do_translation_fault
do_mem_abort
el0_da
el0t_64_sync_handler
el0t_64_sync
Code: d65f03c0 d343ff61 d2d00000 f2fbffe0 (38e06820)
---[ end trace 0000000000000000 ]---
Kernel panic - not syncing: Oops: Fatal exception
SMP: stopping secondary CPUs
Kernel Offset: 0x5d8763da0000 from 0xffff800008000000
PHYS_OFFSET: 0x80000000
CPU features: 0x000,00085c0d,19801c82
Memory Limit: none
---[ end Kernel panic - not syncing: Oops: Fatal exception ]---
>
> v5:
> - Collect Reviewed-by from Dan Williams.
> - Fix panic reported by kernel test robot <oliver.sang@intel.com>.
> - Remove pmdpp parameter from follow_invalidate_pte() and fold it into follow_pte().
>
> v4:
> - Fix compilation error on riscv.
>
> v3:
> - Based on next-20220225.
>
> v2:
> - Avoid the overly long line in lots of places suggested by Christoph.
> - Fix a compiler warning reported by kernel test robot since pmd_pfn()
> is not defined when !CONFIG_TRANSPARENT_HUGEPAGE on powerpc architecture.
> - Split a new patch 4 for preparation of fixing the dax bug.
>
> Muchun Song (6):
> mm: rmap: fix cache flush on THP pages
> dax: fix cache flush on PMD-mapped pages
> mm: rmap: introduce pfn_mkclean_range() to cleans PTEs
> mm: pvmw: add support for walking devmap pages
> dax: fix missing writeprotect the pte entry
> mm: simplify follow_invalidate_pte()
>
> fs/dax.c | 82 +++++-----------------------------------------------
> include/linux/mm.h | 3 --
> include/linux/rmap.h | 3 ++
> mm/internal.h | 26 +++++++++++------
> mm/memory.c | 81 +++++++++++++++------------------------------------
> mm/page_vma_mapped.c | 16 +++++-----
> mm/rmap.c | 68 +++++++++++++++++++++++++++++++++++--------
> 7 files changed, 114 insertions(+), 165 deletions(-)
>
> --
> 2.11.0
>

\
 
 \ /
  Last update: 2022-03-31 17:57    [W:0.130 / U:1.820 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site