Re: [PATCH 0/5] blktrace: fix use after free

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On Tue, Apr 14, 2020 at 04:18:57AM +0000, Luis Chamberlain wrote:
> After two iterations of RFCs I think this is ready now. I've taken
> the feedback from the last series, both on code and commit log.
> I've also extended the commit log on the last patch to also explain
> how the original shift to async request_queue removal turned out
> to actually be a userspace regression and added a respective fixes
> tag for it.
> 
> You can find these patches on my 20200414-dev-blkqueue-defer-removal-patch-v1
> branch based on linux-next tag next-20200414 on kernel.org [0].
> 
> Further review and rants are appreciated.
> 
> [0] https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/log/?h=20200414-dev-blkqueue-defer-removal
> 
> Luis Chamberlain (5):
>   block: move main block debugfs initialization to its own file
>   blktrace: fix debugfs use after free
>   blktrace: refcount the request_queue during ioctl
>   mm/swapfile: refcount block and queue before using
>     blkcg_schedule_throttle()
>   block: revert back to synchronous request_queue removal

Looks good from a debugfs point of view, thanks for doing this cleanup.

greg k-h



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