Re: [PATCH] scsi: qedf: Fix a UAF bug in __qedf_probe

[Martin K. Petersen]

On Fri, 12 Nov 2021 20:06:41 +0800, Letu Ren wrote:

> In __qedf_probe, if `qedf->cdev` is NULL which means
> qed_ops->common->probe() failed, then the program will goto label err1,
> scsi_host_put() will free `lport->host` pointer. Because the memory `qedf`
> points to is allocated by libfc_host_alloc(), it will be freed by
> scsi_host_put(). However, the if statement below label err0 only checks
> whether qedf is NULL but doesn't check whether the memory has been freed.
> So a UAF bug occurred.
> 
> [...]

Applied to 6.0/scsi-fixes, thanks!

[1/1] scsi: qedf: Fix a UAF bug in __qedf_probe
      https://git.kernel.org/mkp/scsi/c/fbfe96869b78

-- 
Martin K. Petersen	Oracle Linux Engineering