------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d99f0 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 125514 hardirqs last enabled at (125513): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (125514): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125474): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (125474): [] rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline] softirqs last enabled at (125474): [] __dev_queue_xmit+0x14cc/0x2bc0 net/core/dev.c:4961 softirqs last disabled at (125458): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (125458): [] rcu_read_lock_bh include/linux/rcupdate.h:902 [inline] softirqs last disabled at (125458): [] __dev_queue_xmit+0x1fc/0x2bc0 net/core/dev.c:4844 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9abb x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 125588 hardirqs last enabled at (125587): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (125588): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125542): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (125542): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (125517): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9b6f x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 125656 hardirqs last enabled at (125655): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (125656): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125610): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (125610): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (125591): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9c37 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 125740 hardirqs last enabled at (125739): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (125740): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125694): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (125694): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (125659): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9cf8 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 125820 hardirqs last enabled at (125819): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (125820): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125756): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (125756): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (125743): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9da5 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 125882 hardirqs last enabled at (125881): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (125882): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125836): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (125836): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (125823): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9e58 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 125944 hardirqs last enabled at (125943): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (125944): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125898): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (125898): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (125885): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9f12 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 126018 hardirqs last enabled at (126017): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (126018): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (125972): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (125972): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (125947): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001d9fcd x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 126086 hardirqs last enabled at (126085): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (126086): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (126040): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (126040): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (126021): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:2/1090 Modules linked in: CPU: 0 UID: 0 PID: 1090 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329 sp : ffff8000940a7840 x29: ffff8000940a78f0 x28: dfff800000000000 x27: ffff0000c3b03880 x26: ffff8000940a7840 x25: dfff800000000000 x24: ffff700012814f08 x23: ffff800086ff9e80 x22: ffff0000c6ad5000 x21: ffff8000870811c0 x20: ffff0000c672e000 x19: 0000000000000000 x18: 1fffe00035bac428 x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0 x14: 00000000001da08a x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 4d72828a8c2ab600 x8 : 4d72828a8c2ab600 x7 : ffff8000804903d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802fa194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c672e000 Call trace: drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P) drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline] drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 126154 hardirqs last enabled at (126153): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (126154): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (126108): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (126108): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (126089): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---