------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1320 at drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322, CPU#0: kworker/0:5/5285 Modules linked in: CPU: 0 UID: 0 PID: 5285 Comm: kworker/0:5 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322 lr : drm_crtc_wait_one_vblank+0x404/0x43c drivers/gpu/drm/drm_vblank.c:1320 sp : ffff800098ce78e0 x29: ffff800098ce7990 x28: dfff800000000000 x27: ffff0000c7d4d880 x26: ffff800098ce78e0 x25: dfff800000000000 x24: ffff70001319cf1c x23: ffff800086d6ff20 x22: ffff0000c7bee000 x21: ffff800086df11e0 x20: ffff0000c7d04000 x19: 0000000000000000 x18: 1fffe00035c1ea20 x17: ffff8000888eb000 x16: ffff80008899dba0 x15: ffff0001ae0f510c x14: ffff0001ae0f5108 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a356d08 x10: 0000000000000003 x9 : 833103b8a9f64a00 x8 : 833103b8a9f64a00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080154bd4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7d04000 Call trace: drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322 (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:237 [inline] drm_fb_helper_damage_work+0x100/0x5d0 drivers/gpu/drm/drm_fb_helper.c:275 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397 worker_thread+0x754/0xba0 kernel/workqueue.c:3478 kthread+0x2f8/0x3c8 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 74328 hardirqs last enabled at (74327): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1644 [inline] hardirqs last enabled at (74327): [] finish_lock_switch kernel/sched/core.c:5125 [inline] hardirqs last enabled at (74327): [] finish_task_switch+0x22c/0x768 kernel/sched/core.c:5243 hardirqs last disabled at (74328): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:429 softirqs last enabled at (74258): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (74258): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (74251): [] __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:1320 at drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322, CPU#0: kworker/0:5/5285 Modules linked in: CPU: 0 UID: 0 PID: 5285 Comm: kworker/0:5 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322 lr : drm_crtc_wait_one_vblank+0x404/0x43c drivers/gpu/drm/drm_vblank.c:1320 sp : ffff800098ce78e0 x29: ffff800098ce7990 x28: dfff800000000000 x27: ffff0000c7d4d880 x26: ffff800098ce78e0 x25: dfff800000000000 x24: ffff70001319cf1c x23: ffff800086d6ff20 x22: ffff0000c7bee000 x21: ffff800086df11e0 x20: ffff0000c7d04000 x19: 0000000000000000 x18: 1fffe00035c1ea20 x17: ffff8000888eb000 x16: ffff80008899dba0 x15: ffff0001ae0f510c x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000001efd x10: 0000000000ff0100 x9 : 833103b8a9f64a00 x8 : 833103b8a9f64a00 x7 : ffff80008047caa0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f1374 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c7d04000 Call trace: drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322 (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:237 [inline] drm_fb_helper_damage_work+0x100/0x5d0 drivers/gpu/drm/drm_fb_helper.c:275 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397 worker_thread+0x754/0xba0 kernel/workqueue.c:3478 kthread+0x2f8/0x3c8 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 74628 hardirqs last enabled at (74627): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (74627): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (74628): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:429 softirqs last enabled at (74574): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (74574): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (74331): [] __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:1320 at drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322, CPU#0: kworker/0:5/5285 Modules linked in: CPU: 0 UID: 0 PID: 5285 Comm: kworker/0:5 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322 lr : drm_crtc_wait_one_vblank+0x404/0x43c drivers/gpu/drm/drm_vblank.c:1320 sp : ffff800098ce78e0 x29: ffff800098ce7990 x28: dfff800000000000 x27: ffff0000c7d4d880 x26: ffff800098ce78e0 x25: dfff800000000000 x24: ffff70001319cf1c x23: ffff800086d6ff20 x22: ffff0000c7bee000 x21: ffff800086df11e0 x20: ffff0000c7d04000 x19: 0000000000000000 x18: 1fffe00035c1ea20 x17: ffff8000888eb000 x16: ffff80008899dba0 x15: ffff0001ae0f510c x14: ffff0001ae0f5108 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a356d08 x10: 0000000000000003 x9 : 833103b8a9f64a00 x8 : 833103b8a9f64a00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080154bd4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7d04000 Call trace: drm_crtc_wait_one_vblank+0x40c/0x43c drivers/gpu/drm/drm_vblank.c:1322 (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:237 [inline] drm_fb_helper_damage_work+0x100/0x5d0 drivers/gpu/drm/drm_fb_helper.c:275 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397 worker_thread+0x754/0xba0 kernel/workqueue.c:3478 kthread+0x2f8/0x3c8 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 74910 hardirqs last enabled at (74909): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1644 [inline] hardirqs last enabled at (74909): [] finish_lock_switch kernel/sched/core.c:5125 [inline] hardirqs last enabled at (74909): [] finish_task_switch+0x22c/0x768 kernel/sched/core.c:5243 hardirqs last disabled at (74910): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:429 softirqs last enabled at (74852): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (74852): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (74631): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]---