16 May
2023
16 May
'23
2:45 p.m.
On Tue, May 16, 2023 at 02:44:49PM +0100, Will Deacon wrote:
Mark -- given that this is an SME allocation, please can you take a look?
I'm on holiday.
I think the implication of the kfence report is that we're writing beyond the end of 'task->thread.sme_state' at some point and corrupting the redzone.
There are two reports here, so hopefully it's not too hard to repro.
I think I *once* saw something that might be this but I've never reproduced it, and I suspect that if this just suddenly came up with LKFT in stable kernels when there's been no relevant changes AFAIR it's not showing up terribly reliably there either.