On Tue, Jul 26, 2022 at 10:25 PM Takashi Iwai tiwai@suse.de wrote:
Thanks for the analysis. A good news is that, at least for the vmalloc() case, it's a kind of false-positive; vmalloc() always takes the full pages, so practically seen, the size is page-aligned. It's fooling the memory checker, though.
But the similar problem could be seen with genalloc calls, and this was fixed by the upstream commit 5c1733e33c888a3cb7f576564d8ad543d5ad4a9e ALSA: memalloc: Align buffer allocations in page size
I suppose you can simply backport this commit to 5.10.y. Could you confirm that this fixes your problem?
We confirm that the patch you proposed fixes the problem (blocks the reproducer). How do we proceed with getting the issue fixed? Do we send a patch according to the steps detailed here: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html?