Re: [PATCH] Revert "fbcon: Use kzalloc() in fbcon_prepare_logo()"

[Tetsuo Handa]

On 2023/07/25 2:03, Geert Uytterhoeven wrote:
> The syzbot report turned out to be a false possitive, caused by a KMSAN
> problem.  Indeed, after allocating the buffer, it is fully initialized
> using scr_memsetw().  Hence there is no point in allocating zeroed
> memory, while this does incur some overhead.

I suggest using below description, for this problem was reported by me
using a kernel built with syzbot's config file (i.e. syzbot is irrelevant).

Commit a6a00d7e8ffd ("fbcon: Use kzalloc() in fbcon_prepare_logo()") is
redundant, for the root cause that resulted in a false positive was fixed
by commit 27f644dc5a77 ("x86: kmsan: use C versions of memset16/memset32/
memset64").