Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-21 Thread Qian Cai
> On Aug 21, 2019, at 9:31 PM, Baoquan He wrote: > > On 08/21/19 at 05:12pm, Qian Cai wrote: Does disabling CONFIG_RANDOMIZE_BASE help? Maybe that workaround has regressed. Effectively we need to find what is causing the kernel to sometimes be placed in the middle of a custom re

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-21 Thread Baoquan He
On 08/21/19 at 05:12pm, Qian Cai wrote: > > > Does disabling CONFIG_RANDOMIZE_BASE help? Maybe that workaround has > > > regressed. Effectively we need to find what is causing the kernel to > > > sometimes be placed in the middle of a custom reserved memmap= range. > > > > Yes, disabling KASLR wor

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-21 Thread Qian Cai
On Sat, 2019-08-17 at 23:25 -0400, Qian Cai wrote: > > On Aug 17, 2019, at 12:59 PM, Dan Williams wrote: > > > > On Sat, Aug 17, 2019 at 4:13 AM Qian Cai wrote: > > > > > > > > > > > > > On Aug 16, 2019, at 11:57 PM, Dan Williams > > > > wrote: > > > > > > > > On Fri, Aug 16, 2019 at 8:34 P

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-17 Thread Qian Cai
> On Aug 17, 2019, at 12:59 PM, Dan Williams wrote: > > On Sat, Aug 17, 2019 at 4:13 AM Qian Cai wrote: >> >> >> >>> On Aug 16, 2019, at 11:57 PM, Dan Williams wrote: >>> >>> On Fri, Aug 16, 2019 at 8:34 PM Qian Cai wrote: > On Aug 16, 2019, at 5:48 PM, Dan William

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-17 Thread Dan Williams
On Sat, Aug 17, 2019 at 4:13 AM Qian Cai wrote: > > > > > On Aug 16, 2019, at 11:57 PM, Dan Williams wrote: > > > > On Fri, Aug 16, 2019 at 8:34 PM Qian Cai wrote: > >> > >> > >> > >>> On Aug 16, 2019, at 5:48 PM, Dan Williams > >>> wrote: > >>> > >>> On Fri, Aug 16, 2019 at 2:36 PM Qian Cai

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-17 Thread Qian Cai
> On Aug 16, 2019, at 11:57 PM, Dan Williams wrote: > > On Fri, Aug 16, 2019 at 8:34 PM Qian Cai wrote: >> >> >> >>> On Aug 16, 2019, at 5:48 PM, Dan Williams wrote: >>> >>> On Fri, Aug 16, 2019 at 2:36 PM Qian Cai wrote: Every so often recently, booting Intel CPU server on l

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-16 Thread Dan Williams
On Fri, Aug 16, 2019 at 8:34 PM Qian Cai wrote: > > > > > On Aug 16, 2019, at 5:48 PM, Dan Williams wrote: > > > > On Fri, Aug 16, 2019 at 2:36 PM Qian Cai wrote: > >> > >> Every so often recently, booting Intel CPU server on linux-next triggers > >> this > >> warning. Trying to figure out if

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-16 Thread Qian Cai
> On Aug 16, 2019, at 5:48 PM, Dan Williams wrote: > > On Fri, Aug 16, 2019 at 2:36 PM Qian Cai wrote: >> >> Every so often recently, booting Intel CPU server on linux-next triggers this >> warning. Trying to figure out if the commit 7cc7867fb061 >> ("mm/devm_memremap_pages: enable sub-sect

Re: devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-16 Thread Dan Williams
On Fri, Aug 16, 2019 at 2:36 PM Qian Cai wrote: > > Every so often recently, booting Intel CPU server on linux-next triggers this > warning. Trying to figure out if the commit 7cc7867fb061 > ("mm/devm_memremap_pages: enable sub-section remap") is the culprit here. > > # ./scripts/faddr2line vmlin

devm_memremap_pages() triggers a kasan_add_zero_shadow() warning

2019-08-16 Thread Qian Cai
Every so often recently, booting Intel CPU server on linux-next triggers this warning. Trying to figure out if the commit 7cc7867fb061 ("mm/devm_memremap_pages: enable sub-section remap") is the culprit here. # ./scripts/faddr2line vmlinux devm_memremap_pages+0x894/0xc70 devm_memremap_pages+0x894