Re: [PATCH 2/2] x86/MCE/AMD: Skip creating kobjects with NULL names

From: Borislav Petkov
Date: Thu Aug 09 2018 - 12:18:17 EST

On Thu, Aug 09, 2018 at 09:08:34AM -0500, Yazen Ghannam wrote:
> From: Yazen Ghannam <yazen.ghannam@xxxxxxx>
> During mce_threshold_create_device() data structures are allocated for
> each CPUs MCA banks and thresholding blocks. These data structures are
> used to save information related to AMD's MCA Error Thresholding
> feature. The structures are used in the thresholding interrupt handler,
> and they are exposed to the user through sysfs. The sysfs interface has
> user-friendly names for each bank.
> However, errors in mce_threshold_create_device() will cause all the data
> structures to be deallocated. This will break the thresholding interrupt
> handler since it depends on these structures.

Same argument as before: if our init fails in some fashion, we should
not be running the interrupt handler.


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