On 05/01/2018 02:46 PM, Andrew Morton wrote:
On Tue, 1 May 2018 13:11:43 -0700 Laura Abbott <labbott@xxxxxxxxxx> wrote:
The existing kcore code checks for bad addresses against
__va(0) with the assumption that this is the lowest address
on the system. This may not hold true on some systems (e.g.
arm64) and produce overflows and crashes. Switch to using
other functions to validate the address range.
Tested-by: Dave Anderson <anderson@xxxxxxxxxx>
Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx>
---
I took your previous comments as a tested by, please let me know if that
was wrong. This should probably just go through -mm. I don't think this
is necessary for stable but I can request it later if necessary.
I'm surprised. "overflows and crashes" sounds rather serious??
It's currently only seen on arm64 and it's not clear if anyone
wants to use that particular combination on a stable release.
I think a better phrase is "this is not urgent for stable".
Thanks,
Laura
