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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Chris Wilson <chris@chris-wilson.co.uk>
Cc: "Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
	"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
	"David Airlie" <airlied@linux.ie>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Matthew Auld" <matthew.auld@intel.com>,
	"Thomas Hellström" <thomas.hellstrom@linux.intel.com>,
	"Jason Ekstrand" <jason@jlekstrand.net>,
	"Lucas De Marchi" <lucas.demarchi@intel.com>,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	kernel-janitors@vger.kernel.org
Subject: [Intel-gfx] [PATCH] drm/i915/gt: Potential error pointer dereference in pinned_context()
Date: Fri, 13 Aug 2021 14:36:00 +0300	[thread overview]
Message-ID: <20210813113600.GC30697@kili> (raw)

If the intel_engine_create_pinned_context() function returns an error
pointer, then dereferencing "ce" will Oops.  Use "vm" instead of
"ce->vm".

Fixes: cf586021642d ("drm/i915/gt: Pipelined page migration")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/gpu/drm/i915/gt/intel_migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index d0a7c934fd3b..1dac21aa7e5c 100644
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -177,7 +177,7 @@ static struct intel_context *pinned_context(struct intel_gt *gt)
 	ce = intel_engine_create_pinned_context(engine, vm, SZ_512K,
 						I915_GEM_HWS_MIGRATE,
 						&key, "migrate");
-	i915_vm_put(ce->vm);
+	i915_vm_put(vm);
 	return ce;
 }
 
-- 
2.20.1


WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Chris Wilson <chris@chris-wilson.co.uk>
Cc: "Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
	"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
	"David Airlie" <airlied@linux.ie>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Matthew Auld" <matthew.auld@intel.com>,
	"Thomas Hellström" <thomas.hellstrom@linux.intel.com>,
	"Jason Ekstrand" <jason@jlekstrand.net>,
	"Lucas De Marchi" <lucas.demarchi@intel.com>,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	kernel-janitors@vger.kernel.org
Subject: [PATCH] drm/i915/gt: Potential error pointer dereference in pinned_context()
Date: Fri, 13 Aug 2021 14:36:00 +0300	[thread overview]
Message-ID: <20210813113600.GC30697@kili> (raw)

If the intel_engine_create_pinned_context() function returns an error
pointer, then dereferencing "ce" will Oops.  Use "vm" instead of
"ce->vm".

Fixes: cf586021642d ("drm/i915/gt: Pipelined page migration")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/gpu/drm/i915/gt/intel_migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index d0a7c934fd3b..1dac21aa7e5c 100644
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -177,7 +177,7 @@ static struct intel_context *pinned_context(struct intel_gt *gt)
 	ce = intel_engine_create_pinned_context(engine, vm, SZ_512K,
 						I915_GEM_HWS_MIGRATE,
 						&key, "migrate");
-	i915_vm_put(ce->vm);
+	i915_vm_put(vm);
 	return ce;
 }
 
-- 
2.20.1


             reply	other threads:[~2021-08-13 11:36 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-13 11:36 Dan Carpenter [this message]
2021-08-13 11:36 ` [PATCH] drm/i915/gt: Potential error pointer dereference in pinned_context() Dan Carpenter
2021-08-13 12:35 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
2021-08-13 14:01 ` [Intel-gfx] [PATCH] " Thomas Hellström
2021-08-13 14:01   ` Thomas Hellström
2021-08-20 16:34   ` [Intel-gfx] " Rodrigo Vivi
2021-08-20 16:34     ` Rodrigo Vivi
2021-08-13 16:01 ` [Intel-gfx] ✗ Fi.CI.IGT: failure for " Patchwork
2021-08-18 18:31 ` [Intel-gfx] ✓ Fi.CI.BAT: success for drm/i915/gt: Potential error pointer dereference in pinned_context() (rev2) Patchwork
2021-08-18 20:12 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork

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