Re: [PATCH v3] nvme/069: add a test for multipath cdev lifetime
Daniel Wagner <[email protected]>
| Newsgroups | org.infradead.lists.linux-nvme,org.kernel.vger.linux-block |
|---|---|
| Message-ID | <[email protected]> |
On Wed, Jul 15, 2026 at 03:55:31PM +0000, John Garry wrote: > From: John Garry <[email protected]> > > In [0], a fix was proposed for the NS and NS head (multipath) cdev > lifetime. > > The issue was that fds for the nvme-generic cdev may exist after we tear > down the nvme-subsystem. Issuing an ioctl on that cdev may expose a > use-after-free. > > This test recreates the method described in [0] to expose this issue > for NS head cdev. > > First a fd is created by opening the nvme-generic cdev. Next we tear down > the nvme-subsystem. Finally we try to issue an ioctl on the cdev - without > the kernel fix in [0], this should trigger a KASAN warn. > > [0] https://lore.kernel.org/linux-nvme/[email protected]/T/#me118851584fbcbb960795d0f04e2262e5a295613 > > Signed-off-by: John Garry <[email protected]> Looks good to me! Thanks! Reviewed-by: Daniel Wagner <[email protected]>