The drm_exec tests where crashing[0] because of a null dereference. This is caused by a new access of the `driver` attribute of `struct drm_driver` on drm_gem_private_object_init(). Alloc the drm_device to fix that. [0] [15:05:24] ================== drm_exec (6 subtests) =================== [15:05:24] [PASSED] sanitycheck ^CERROR:root:Build interruption occurred. Cleaning console. [15:05:50] [ERROR] Test: drm_exec: missing expected subtest! [15:05:50] BUG: kernel NULL pointer dereference, address: 00000000000000b0 [15:05:50] #PF: supervisor read access in kernel mode [15:05:50] #PF: error_code(0x0000) - not-present page [15:05:50] PGD 0 P4D 0 [15:05:50] Oops: 0000 [#1] PREEMPT NOPTI [15:05:50] CPU: 0 PID: 23 Comm: kunit_try_catch Tainted: G N 6.4.0-rc7-02032-ge6303f323b1a #69 [15:05:50] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc37 04/01/2014 [15:05:50] RIP: 0010:drm_gem_private_object_init+0x60/0xc0 Fixes: e6303f323b1a ("drm: manager to keep track of GPUs VA mappings") Signed-off-by: Arthur Grillo <arthurgrillo@xxxxxxxxxx> Tested-by: Danilo Krummrich <dakr@xxxxxxxxxx> Acked-by: Danilo Krummrich <dakr@xxxxxxxxxx> Reviewed-by: Maíra Canal <mcanal@xxxxxxxxxx> --- v1->v2: https://lore.kernel.org/all/20230727192259.237935-1-arthurgrillo@xxxxxxxxxx/ - s/test_init/drm_exec_test_init/ (Maíra) - s/test_exit/drm_exec_test_exit/ (Maíra) - Use test->priv intead of global variables (Maíra and Maxime) v2->v3: https://lore.kernel.org/r/20230728183400.306193-1-arthurgrillo@xxxxxxxxxx - Remove unnecessary call to drm_kunit_helper_free_device() (Maxime) --- drivers/gpu/drm/tests/drm_exec_test.c | 44 ++++++++++++++++++++++----- 1 file changed, 37 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/tests/drm_exec_test.c b/drivers/gpu/drm/tests/drm_exec_test.c index 727ac267682e..f79c9f0359aa 100644 --- a/drivers/gpu/drm/tests/drm_exec_test.c +++ b/drivers/gpu/drm/tests/drm_exec_test.c @@ -12,11 +12,35 @@ #include <drm/drm_exec.h> #include <drm/drm_device.h> +#include <drm/drm_drv.h> #include <drm/drm_gem.h> +#include <drm/drm_kunit_helpers.h> #include "../lib/drm_random.h" -static struct drm_device dev; +struct drm_exec_priv { + struct device *dev; + struct drm_device *drm; +}; + +static int drm_exec_test_init(struct kunit *test) +{ + struct drm_exec_priv *priv; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); + + test->priv = priv; + + priv->dev = drm_kunit_helper_alloc_device(test); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev); + + priv->drm = __drm_kunit_helper_alloc_drm_device(test, priv->dev, sizeof(*priv->drm), 0, + DRIVER_MODESET); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm); + + return 0; +} static void sanitycheck(struct kunit *test) { @@ -29,11 +53,12 @@ static void sanitycheck(struct kunit *test) static void test_lock(struct kunit *test) { + struct drm_exec_priv *priv = test->priv; struct drm_gem_object gobj = { }; struct drm_exec exec; int ret; - drm_gem_private_object_init(&dev, &gobj, PAGE_SIZE); + drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE); drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT); drm_exec_until_all_locked(&exec) { @@ -48,11 +73,12 @@ static void test_lock(struct kunit *test) static void test_lock_unlock(struct kunit *test) { + struct drm_exec_priv *priv = test->priv; struct drm_gem_object gobj = { }; struct drm_exec exec; int ret; - drm_gem_private_object_init(&dev, &gobj, PAGE_SIZE); + drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE); drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT); drm_exec_until_all_locked(&exec) { @@ -74,11 +100,12 @@ static void test_lock_unlock(struct kunit *test) static void test_duplicates(struct kunit *test) { + struct drm_exec_priv *priv = test->priv; struct drm_gem_object gobj = { }; struct drm_exec exec; int ret; - drm_gem_private_object_init(&dev, &gobj, PAGE_SIZE); + drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE); drm_exec_init(&exec, DRM_EXEC_IGNORE_DUPLICATES); drm_exec_until_all_locked(&exec) { @@ -102,11 +129,12 @@ static void test_duplicates(struct kunit *test) static void test_prepare(struct kunit *test) { + struct drm_exec_priv *priv = test->priv; struct drm_gem_object gobj = { }; struct drm_exec exec; int ret; - drm_gem_private_object_init(&dev, &gobj, PAGE_SIZE); + drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE); drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT); drm_exec_until_all_locked(&exec) { @@ -121,14 +149,15 @@ static void test_prepare(struct kunit *test) static void test_prepare_array(struct kunit *test) { + struct drm_exec_priv *priv = test->priv; struct drm_gem_object gobj1 = { }; struct drm_gem_object gobj2 = { }; struct drm_gem_object *array[] = { &gobj1, &gobj2 }; struct drm_exec exec; int ret; - drm_gem_private_object_init(&dev, &gobj1, PAGE_SIZE); - drm_gem_private_object_init(&dev, &gobj2, PAGE_SIZE); + drm_gem_private_object_init(priv->drm, &gobj1, PAGE_SIZE); + drm_gem_private_object_init(priv->drm, &gobj2, PAGE_SIZE); drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT); drm_exec_until_all_locked(&exec) @@ -150,6 +179,7 @@ static struct kunit_case drm_exec_tests[] = { static struct kunit_suite drm_exec_test_suite = { .name = "drm_exec", + .init = drm_exec_test_init, .test_cases = drm_exec_tests, }; -- 2.41.0