Re: [PATCH] x86/fpu/signal: initialize sw_bytes in save_xstate_epilog()

Dave Hansen
2021-11-30T21:09:08Z

On 11/26/21 4:47 AM, Alexander Potapenko wrote:
> save_sw_bytes() did not fully initialize sw_bytes, which caused KMSAN
> to report an infoleak (see below).
> Initialize sw_bytes explicitly to avoid this.
...
> Reported-by: Alexander Potapenko <glider@google.com>
> Signed-off-by: Marco Elver <elver@google.com>
> Signed-off-by: Alexander Potapenko <glider@google.com>
> Tested-by: Alexander Potapenko <glider@google.com>
> Fixes: 53599b4d54b9b8dd ("x86/fpu/signal: Prepare for variable sigframe length")
> Link: https://lore.kernel.org/all/CAG_fn=V9T6OKPonSjsi9PmWB0hMHFC=yawozdft8i1-MSxrv=w@mail.gmail.com/

Hi Alexander,

Marco's SoB entry is before yours. Was this authored by you or Marco?
If it was Marco, it's customary to add a:

From: Marco Elver <elver@google.com>

at the top of the changelog to make sure git gets the author right. I'm
happy to fix it up this time, I just need to know who wrote it.