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SubjectRe: [PATCH 2/5] blktrace: fix debugfs use after free
On Thu, Apr 16, 2020 at 10:10:36AM +0800, Ming Lei wrote:
> In theory, multiple partitions can be traced concurrently, but looks
> it never works, so it won't cause trouble for multiple partition trace.
>
> One userspace visible change is that blktrace debugfs dir name is switched
> to disk name from partition name in case of partition trace, will it
> break some utilities?

How is this possible, its not clear to me, we go from:

- q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent),
- blk_debugfs_root);

To this:

+ q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent),
+ blk_debugfs_root);


Maybe I am overlooking something.

Luis

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