CVE-2026-89591: accel/rocket: initialize job domain before cleanup paths

CVE-2026-89591: accel/rocket: initialize job domain before cleanup paths

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

accel/rocket: initialize job domain before cleanup paths

rocket_ioctl_submit_job() releases rjob through rocket_job_put() on
allocation error paths. rocket_job_cleanup() unconditionally calls
rocket_iommu_domain_put(job->domain), but job->domain is assigned only
after task copying and BO lookups. A failure before that assignment can
therefore clean up a job with a NULL domain pointer.

Take the per-file domain reference before the first error path can release
rjob. Also clear rjob->tasks after freeing it in rocket_copy_tasks(), so
the common cleanup path cannot free the task array again after a task-copy
error.

The Linux kernel CVE team has assigned CVE-2026-89591 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.18 with commit 0810d5ad88a18f1e6d549853a388ad0316f74e36 and fixed in 6.18.50 with commit 3043230296653a609ab50006899e64bbb2d99465
	Issue introduced in 6.18 with commit 0810d5ad88a18f1e6d549853a388ad0316f74e36 and fixed in 7.2.4 with commit 81731f1eda5e6a1dfad31445f741de9bbefbb08e
	Issue introduced in 6.18 with commit 0810d5ad88a18f1e6d549853a388ad0316f74e36 and fixed in 7.3-rc1 with commit 70e6a33d68a9b03335c5426332666e52d07f45d6

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-89591
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/accel/rocket/rocket_job.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/3043230296653a609ab50006899e64bbb2d99465
	https://git.kernel.org/stable/c/81731f1eda5e6a1dfad31445f741de9bbefbb08e
	https://git.kernel.org/stable/c/70e6a33d68a9b03335c5426332666e52d07f45d6