在 2022/10/18 3:56, Mike Snitzer 写道:
On Mon, Oct 10 2022 at 10:41P -0400,
Luo Meng wrote:
From: Luo Meng
If dm_get_device() create dd in multipath_message(),
and then call table_deps() after dm_put_table_device(),
it will lead to concurrency UAF bugs.
One of the concurrency UAF can be shown
On Thu, May 18, 2023 at 03:33:23PM -0700, Sarthak Kukreti wrote:
> +EXPORT_SYMBOL(blkdev_issue_provision);
IFF this gets in in some form, please make sure all exports for new
block layer functionality are EXPORT_SYMBOL_GPL, thanks.
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On Thu, May 18, 2023 at 03:33:22PM -0700, Sarthak Kukreti wrote:
> Only call truncate_bdev_range() if the fallocate mode is
> supported. This fixes a bug where data in the pagecache
> could be invalidated if the fallocate() was called on the
> block device with an invalid mode.
>
> Fixes: 25f4c414
FYI, I really don't think this primitive is a good idea. In the
concept of non-overwritable storage (NAND, SMR drives) the entire
concept of a one-shoot 'provisioning' that will guarantee later writes
are always possible is simply bogus.
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