Re: [PATCH V6] mm: fix kernel crash in khugepaged thread

2015-11-13 Thread David Rientjes
On Fri, 13 Nov 2015, yalin wang wrote: > This crash is caused by NULL pointer deference, in page_to_pfn() marco, > when page == NULL : > > [ 182.639154 ] Unable to handle kernel NULL pointer dereference at virtual > address > [ 182.639491 ] pgd = ffc00077a000 > [ 182.639761 ] [00

Re: [PATCH V6] mm: fix kernel crash in khugepaged thread

2015-11-13 Thread Kirill A. Shutemov
On Fri, Nov 13, 2015 at 01:18:09PM +0100, Vlastimil Babka wrote: > On 11/13/2015 01:07 PM, yalin wang wrote: > >This crash is caused by NULL pointer deference, in page_to_pfn() marco, > >when page == NULL : > > > >[ 182.639154 ] Unable to handle kernel NULL pointer dereference at virtual > >addre

Re: [PATCH V6] mm: fix kernel crash in khugepaged thread

2015-11-13 Thread Vlastimil Babka
On 11/13/2015 01:07 PM, yalin wang wrote: This crash is caused by NULL pointer deference, in page_to_pfn() marco, when page == NULL : [ 182.639154 ] Unable to handle kernel NULL pointer dereference at virtual address [ 182.639491 ] pgd = ffc00077a000 [ 182.639761 ] [] *p

[PATCH V6] mm: fix kernel crash in khugepaged thread

2015-11-13 Thread yalin wang
This crash is caused by NULL pointer deference, in page_to_pfn() marco, when page == NULL : [ 182.639154 ] Unable to handle kernel NULL pointer dereference at virtual address [ 182.639491 ] pgd = ffc00077a000 [ 182.639761 ] [] *pgd=b9422003, *pud=b9422003,