[Linaro-mm-sig] Re: [PATCH v2] udmabuf: Fix a potential (and unlikely) access to unallocated memory

On Sun, Feb 18, 2024 at 06:46:44PM +0100, Christophe JAILLET wrote:

If 'list_limit' is set to a very high value, 'lsize' computation could overflow if 'head.count' is big enough.

The "list_limit" is set via module parameter so if you set that high enough to lead to an integer overflow then you kind of deserve what you get.

This patch is nice for kernel hardening and making the code easier to read/audit but the real world security impact is negligible.

regards, dan carpenter