Re: [Bug 201603] New: NULL pointer dereference when using z3fold and zswap

Re: [Bug 201603] New: NULL pointer dereference when using z3fold and zswap

[Andrew Morton]

(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Fri, 02 Nov 2018 10:41:46 +0000 bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=201603
> 
>             Bug ID: 201603
>            Summary: NULL pointer dereference when using z3fold and zswap
>            Product: Memory Management
>            Version: 2.5
>     Kernel Version: 4.18.16
>           Hardware: All
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: high
>           Priority: P1
>          Component: Page Allocator
>           Assignee: akpm@linux-foundation.org
>           Reporter: jagannathante@gmail.com
>         Regression: No
> 
> Created attachment 279297
>   --> https://bugzilla.kernel.org/attachment.cgi?id=279297&action=edit
> dmesg log of crash
> 
> This happens mostly during memory pressure but I am not sure how to trigger it
> reliably. I am attaching the full log.
> 
> This is the kernel commandline
> 
> >BOOT_IMAGE=../vmlinuz-linux root=UUID=57274b3a-92ab-468e-b03a-06026675c1af rw
> >rd.luks.name=92b4aeb2-fb97-45c1-8a60-2816efe5d57e=home resume=/dev/mapper/home
> >resume_offset=42772480 acpi_backlight=video zswap.enabled=1 zswap.zpool=z3fold
> >zswap.max_pool_percent=5 transparent_hugepage=madvise scsi_mod.use_blk_mq=1
> >vga=current initrd=../intel-ucode.img,../initramfs-linux.img
> 
> I found this bug https://bugzilla.kernel.org/show_bug.cgi?id=198585 to be very
> similar but the proposed fix has not been merged so I can't be sure if it will
> fix the issue I am having.
> 
> -- 
> You are receiving this mail because:
> You are the assignee for the bug.

Re: [Bug 201603] New: NULL pointer dereference when using z3fold and zswap

[Vitaly Wool]

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Hi,
Den tis 6 nov. 2018 kl 22:48 skrev Andrew Morton <akpm@linux-foundation.org
>:

>
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Fri, 02 Nov 2018 10:41:46 +0000 bugzilla-daemon@bugzilla.kernel.org
> wrote:
>
> > https://bugzilla.kernel.org/show_bug.cgi?id=201603
> >
> >             Bug ID: 201603
> >            Summary: NULL pointer dereference when using z3fold and zswap
> >            Product: Memory Management
> >            Version: 2.5
> >     Kernel Version: 4.18.16
> >           Hardware: All
> >                 OS: Linux
> >               Tree: Mainline
> >             Status: NEW
> >           Severity: high
> >           Priority: P1
> >          Component: Page Allocator
> >           Assignee: akpm@linux-foundation.org
> >           Reporter: jagannathante@gmail.com
> >         Regression: No
> >
> > Created attachment 279297
> >   --> https://bugzilla.kernel.org/attachment.cgi?id=279297&action=edit
> > dmesg log of crash
>
>
Basing on what I see in dmesg, it is highly likely to get fixed by
https://lkml.org/lkml/2018/11/5/726. Could you please apply/retest?

Best regards,
   Vitaly

> > This happens mostly during memory pressure but I am not sure how to
> trigger it
> > reliably. I am attaching the full log.
> >
> > This is the kernel commandline
> >
> > >BOOT_IMAGE=../vmlinuz-linux
> root=UUID=57274b3a-92ab-468e-b03a-06026675c1af rw
> > >rd.luks.name=92b4aeb2-fb97-45c1-8a60-2816efe5d57e=home
> resume=/dev/mapper/home
> > >resume_offset=42772480 acpi_backlight=video zswap.enabled=1
> zswap.zpool=z3fold
> > >zswap.max_pool_percent=5 transparent_hugepage=madvise
> scsi_mod.use_blk_mq=1
> > >vga=current initrd=../intel-ucode.img,../initramfs-linux.img
> >
> > I found this bug https://bugzilla.kernel.org/show_bug.cgi?id=198585 to
> be very
> > similar but the proposed fix has not been merged so I can't be sure if
> it will
> > fix the issue I am having.
> >
> > --
> > You are receiving this mail because:
> > You are the assignee for the bug.
>

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