------------[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 61502 hardirqs last enabled at (61501): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61501): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61501): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61502): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (61456): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61456): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61437): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 61616 hardirqs last enabled at (61615): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61615): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61615): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61616): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (61564): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61564): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61505): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 61710 hardirqs last enabled at (61709): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61709): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61709): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61710): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (61658): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61658): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61619): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 61808 hardirqs last enabled at (61807): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61807): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61807): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61808): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (61756): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61756): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61713): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 61926 hardirqs last enabled at (61925): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61925): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61925): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61926): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (61840): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61840): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61811): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 62010 hardirqs last enabled at (62009): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62009): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62009): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62010): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (61958): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61958): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61929): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 62094 hardirqs last enabled at (62093): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62093): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62093): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62094): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (62042): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62042): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62013): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 62188 hardirqs last enabled at (62187): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62187): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62187): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62188): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (62136): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62136): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62097): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:2/1032 Modules linked in: CPU: 0 UID: 0 PID: 1032 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 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 : ffff800094167820 x29: ffff8000941678d0 x28: dfff800000000000 x27: ffff0000c5e11080 x26: ffff800094167820 x25: dfff800000000000 x24: ffff70001282cf04 x23: ffff800086f383a0 x22: ffff0000c5f39000 x21: ffff800086fbdb80 x20: ffff0000c5f54000 x19: 0000000000000000 x18: 1fffe00035bc5428 x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd060 x14: ffff0001ade2a14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a590e28 x10: 0000000000000003 x9 : bb9efcdc7fa04e00 x8 : bb9efcdc7fa04e00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156f90 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c5f54000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 62302 hardirqs last enabled at (62301): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62301): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62301): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62302): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (62250): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62250): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62191): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]---