lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 25 Oct 2013 00:33:47 +0800 From: Chuansheng Liu <chuansheng.liu@...el.com> To: daniel.vetter@...ll.ch, airlied@...ux.ie Cc: intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, chuansheng.liu@...el.com, fei.li@...el.com Subject: drm/i915: Avoid accessing the stolen address when it is unavailable In our platform, we hit the the stolen region initialization failure case, such as below log: [drm:i915_stolen_to_physical] *ERROR* conflict detected with stolen region: [0x7b000000] And it causes the dev_priv->mm.stolen_base is NULL, in this case, we should avoid accessing it any more. Here is possible call trace: intel_enable_gt_powersave -- > valleyview_enable_rps -- > valleyview_setup_pctx Cc: Li Fei <fei.li@...el.com> Signed-off-by: Liu, Chuansheng <chuansheng.liu@...el.com> --- drivers/gpu/drm/i915/intel_pm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 26c2ea3..1069b24 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3735,6 +3735,9 @@ static void valleyview_setup_pctx(struct drm_device *dev) u32 pcbr; int pctx_size = 24*1024; + if (!dev_priv->mm.stolen_base) + return; + pcbr = I915_READ(VLV_PCBR); if (pcbr) { /* BIOS set it up already, grab the pre-alloc'd space */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists