Re: [PATCH] kernel: sysctl: ignore out-of-range taint bits introduced via kernel.tainted

[Luis Chamberlain]

On Tue, May 12, 2020 at 01:46:53PM -0400, Rafael Aquini wrote:
> The sysctl knob allows users with SYS_ADMIN capability to
> taint the kernel with any arbitrary value, but this might
> produce an invalid flags bitset being committed to tainted_mask.
> 
> This patch introduces a simple way for proc_taint() to ignore
> any eventual invalid bit coming from the user input before
> committing those bits to the kernel tainted_mask.
> 
> Signed-off-by: Rafael Aquini <aquini@xxxxxxxxxx>

Acked-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>

  Luis