Hi,
On 6/22/19 4:09 PM, Chris Wilson wrote:
Quoting Lu Baolu (2019-06-22 07:49:22)
Hi Chris,
Thanks for the test and report.
On 6/21/19 9:27 PM, Chris Wilson wrote:
We see a use-after-free in our CI about 20% of the time on a Skylake
iommu testing host, present since enabling that host. Sadly, it has not
presented itself while running under KASAN.
<4> [302.391799] general protection fault: 0000 [#1] PREEMPT SMP PTI
<4> [302.391803] CPU: 7 PID: 4854 Comm: i915_selftest Tainted: G U
5.2.0-rc5-CI-CI_DRM_6320+ #1
Since it's CI-CI_DRM_6320+, what kind of patches have you applied on top
of 5.2.0-rc5?
$ git diff --stat v5.2-rc5..intel/CI_DRM_6320
...
1383 files changed, 62481 insertions(+), 35301 deletions(-)
The usual drivers/gpu churn, and nothing inside drivers/iommu.
Can this be reproduced with any bare mainline rc's? So that people can
reproduce and debug it.
Best regards,
Baolu
Our oldest report (when the machine was configured) was with
4.19.0-CI-CI_DRM_5049. The tags are available from
git://git.freedesktop.org/git/gfx-ci/linux
-Chris
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