On Fri, 11 Mar 2022, kernel test robot wrote:
>
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: aae2359b1a514180633c4a4e6666c91e44a928c8 ("mm: thp: don't have to lock page anymore when splitting PMD")
Yes, known bad patch, replaced by good patch a day or two later.
> url: https://github.com/0day-ci/linux/commits/Qianggui-Song/arm64-dts-meson-s4-add-gpio_intc-node/20220310-172923
>
> in testcase: trinity
> version: trinity-static-i386-x86_64-f93256fb_2019-08-28
> with following parameters:
>
> runtime: 300s
> group: group-01
>
> test-description: Trinity is a linux system call fuzz tester.
> test-url: http://codemonkey.org.uk/projects/trinity/
>
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
>
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <[email protected]>
>
>
> [ 20.947643][ T4079] mm/pgtable-generic.c:51: bad pmd e7d8e333(8000000433c000c5)
> [ 20.949757][ T427] BUG: Bad rss-counter state mm:84638533 type:MM_ANONPAGES val:512
> [ 20.951030][ T427] BUG: non-zero pgtables_bytes on freeing mm: 4096
> [ 20.960329][ T4080] mm/pgtable-generic.c:51: bad pmd 6dc594d8(8000000433c000c5)
> [ 20.961775][ T427] BUG: Bad rss-counter state mm:bf324b3f type:MM_ANONPAGES val:512
> [ 20.963109][ T427] BUG: non-zero pgtables_bytes on freeing mm: 4096
> [ 20.974600][ T4081] mm/pgtable-generic.c:51: bad pmd d1c9ec63(8000000433c000c5)
> [ 20.977758][ T427] BUG: Bad rss-counter state mm:e038d31c type:MM_ANONPAGES val:512
> [ 20.978918][ T427] BUG: non-zero pgtables_bytes on freeing mm: 4096
> [ 20.982960][ T4082] mm/pgtable-generic.c:51: bad pmd 8d2043e0(8000000433c000c5)
> [ 20.994138][ T4083] BUG: Bad rss-counter state mm:890a50d8 type:MM_ANONPAGES val:512
> [ 20.995441][ T4083] BUG: non-zero pgtables_bytes on freeing mm: 4096
> [ 20.997140][ T4083] mm/pgtable-generic.c:51: bad pmd 78b279e7(8000000433c000c5)
> [ 21.088268][ T3649] BUG: Bad rss-counter state mm:10e6eb4f type:MM_ANONPAGES val:512
> [ 21.089552][ T3649] BUG: non-zero pgtables_bytes on freeing mm: 4096