Hi Zachary,

Zachary Palmer wrote:

> On occasion, hibernating my laptop will result in a kernel bug report. This
> appears to occur more often when I perform operations such as unplugging the
> power while the laptop is hibernating; it also appears to occur more often if
> a large amount of I/O is occurring when hibernation begins.
>
> The problem appears to be with the hibernation system attemting to free a
> page frame that is not allocated. The actual line on which BUG_ON is invoked
> is in memory_bm_clear_bit of /kernel/power/snapshot.c. It is doing this in
> response to the -EFAULT value returned by memory_bm_find_bit in the same file.

Thanks for a clear report and sorry for the very slow response.
Before delving further into this:

- do you still have access to this hardware?
- what kernel do you use these days? does it still have trouble
hibernating?
- any new observations collected since this report? any workarounds
or more reliable reproduction recipes?

Hope that helps,
Jonathan



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