Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-26 Thread Michal Hocko
On Thu 26-03-20 11:16:33, Michal Hocko wrote: > On Thu 26-03-20 15:26:22, Aneesh Kumar K.V wrote: > > On 3/26/20 3:10 PM, Michal Hocko wrote: > > > On Wed 25-03-20 08:49:14, Aneesh Kumar K.V wrote: > > > > Fixes the below crash > > > > > > > > BUG: Kernel NULL pointer dereference on read at 0x

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-26 Thread Michal Hocko
On Thu 26-03-20 15:26:22, Aneesh Kumar K.V wrote: > On 3/26/20 3:10 PM, Michal Hocko wrote: > > On Wed 25-03-20 08:49:14, Aneesh Kumar K.V wrote: > > > Fixes the below crash > > > > > > BUG: Kernel NULL pointer dereference on read at 0x > > > Faulting instruction address: 0xc0c3447

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-26 Thread Aneesh Kumar K.V
On 3/26/20 3:10 PM, Michal Hocko wrote: On Wed 25-03-20 08:49:14, Aneesh Kumar K.V wrote: Fixes the below crash BUG: Kernel NULL pointer dereference on read at 0x Faulting instruction address: 0xc0c3447c Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Hash SMP

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-26 Thread Michal Hocko
On Wed 25-03-20 08:49:14, Aneesh Kumar K.V wrote: > Fixes the below crash > > BUG: Kernel NULL pointer dereference on read at 0x > Faulting instruction address: 0xc0c3447c > Oops: Kernel access of bad area, sig: 11 [#1] > LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries > CP

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-25 Thread Andrew Morton
On Wed, 25 Mar 2020 08:49:14 +0530 "Aneesh Kumar K.V" wrote: > Fixes the below crash (cc's added) > BUG: Kernel NULL pointer dereference on read at 0x > Faulting instruction address: 0xc0c3447c > Oops: Kernel access of bad area, sig: 11 [#1] > LE PAGE_SIZE=64K MMU=Hash SMP NR_C

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-25 Thread Baoquan He
On 03/25/20 at 01:42pm, Aneesh Kumar K.V wrote: > On 3/25/20 1:07 PM, Baoquan He wrote: > > On 03/25/20 at 03:06pm, Baoquan He wrote: > > > On 03/25/20 at 08:49am, Aneesh Kumar K.V wrote: > > > > > > mm/sparse.c | 2 ++ > > > > 1 file changed, 2 insertions(+) > > > > > > > > diff --git a/mm/sp

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-25 Thread Aneesh Kumar K.V
On 3/25/20 1:07 PM, Baoquan He wrote: On 03/25/20 at 03:06pm, Baoquan He wrote: On 03/25/20 at 08:49am, Aneesh Kumar K.V wrote: mm/sparse.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/sparse.c b/mm/sparse.c index aadb7298dcef..3012d1f3771a 100644 --- a/mm/sparse.c +++ b/mm/spa

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-25 Thread Baoquan He
On 03/25/20 at 03:06pm, Baoquan He wrote: > On 03/25/20 at 08:49am, Aneesh Kumar K.V wrote: > > mm/sparse.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/mm/sparse.c b/mm/sparse.c > > index aadb7298dcef..3012d1f3771a 100644 > > --- a/mm/sparse.c > > +++ b/mm/sparse.c > > @@ -7

Re: [PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-25 Thread Baoquan He
On 03/25/20 at 08:49am, Aneesh Kumar K.V wrote: > Fixes the below crash > > BUG: Kernel NULL pointer dereference on read at 0x > Faulting instruction address: 0xc0c3447c > Oops: Kernel access of bad area, sig: 11 [#1] > LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries > CPU:

[PATCH] mm/sparse: Fix kernel crash with pfn_section_valid check

2020-03-24 Thread Aneesh Kumar K.V
Fixes the below crash BUG: Kernel NULL pointer dereference on read at 0x Faulting instruction address: 0xc0c3447c Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries CPU: 11 PID: 7519 Comm: lt-ndctl Not tainted 5.6.0-rc7-autotest #1