Messages in this thread | | | Date | Tue, 25 Jul 2023 21:40:17 +0900 | Subject | Re: [PATCH] Revert "fbcon: Use kzalloc() in fbcon_prepare_logo()" | From | Tetsuo Handa <> |
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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").
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