------------[ 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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : ffff80008048e314 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f9194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 114040 hardirqs last enabled at (114039): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (114039): [] __arm64_exit_to_kernel_mode+0x64/0x78 arch/arm64/kernel/entry-common.c:60 hardirqs last disabled at (114040): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (113902): [] spin_unlock_bh include/linux/spinlock.h:407 [inline] softirqs last enabled at (113902): [] nsim_fib_event_work+0x188/0x320 drivers/net/netdevsim/fib.c:1488 softirqs last disabled at (113900): [] spin_lock_bh include/linux/spinlock.h:353 [inline] softirqs last disabled at (113900): [] nsim_fib_event_work+0xc4/0x320 drivers/net/netdevsim/fib.c:1486 ---[ 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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000003 x11: ffff80008a6a6e28 x10: 0000000000000003 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801561b4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 114164 hardirqs last enabled at (114163): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1698 [inline] hardirqs last enabled at (114163): [] finish_lock_switch kernel/sched/core.c:5251 [inline] hardirqs last enabled at (114163): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5369 hardirqs last disabled at (114164): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (114112): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (114112): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (114043): [] __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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000003 x11: ffff80008a6a6e28 x10: 0000000000000003 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801561b4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 114290 hardirqs last enabled at (114289): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1698 [inline] hardirqs last enabled at (114289): [] finish_lock_switch kernel/sched/core.c:5251 [inline] hardirqs last enabled at (114289): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5369 hardirqs last disabled at (114290): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (114238): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (114238): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (114167): [] __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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000003 x11: ffff80008a6a6e28 x10: 0000000000000003 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801561b4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 114588 hardirqs last enabled at (114587): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1698 [inline] hardirqs last enabled at (114587): [] finish_lock_switch kernel/sched/core.c:5251 [inline] hardirqs last enabled at (114587): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5369 hardirqs last disabled at (114588): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (114532): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (114532): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (114293): [] __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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: ffff0001adcf614c x13: 0000000000000001 x12: 0000000000000003 x11: ffff80008a6a6e28 x10: 0000000000000003 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801561b4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 114684 hardirqs last enabled at (114683): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1698 [inline] hardirqs last enabled at (114683): [] finish_lock_switch kernel/sched/core.c:5251 [inline] hardirqs last enabled at (114683): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5369 hardirqs last disabled at (114684): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (114632): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (114632): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (114591): [] __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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000003 x11: ffff80008a6a6e28 x10: 0000000000000003 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801561b4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 114798 hardirqs last enabled at (114797): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1698 [inline] hardirqs last enabled at (114797): [] finish_lock_switch kernel/sched/core.c:5251 [inline] hardirqs last enabled at (114797): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5369 hardirqs last disabled at (114798): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (114746): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (114746): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (114687): [] __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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: ffff0001adcf614c x13: 0000000000000001 x12: 0000000000000003 x11: ffff80008a6a6e28 x10: 0000000000000003 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801561b4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 115120 hardirqs last enabled at (115119): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1698 [inline] hardirqs last enabled at (115119): [] finish_lock_switch kernel/sched/core.c:5251 [inline] hardirqs last enabled at (115119): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5369 hardirqs last disabled at (115120): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (115032): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (115032): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (114801): [] __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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : ffff80008048e314 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f9194 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 115384 hardirqs last enabled at (115383): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (115383): [] __arm64_exit_to_kernel_mode+0x64/0x78 arch/arm64/kernel/entry-common.c:60 hardirqs last disabled at (115384): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (115334): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (115334): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (115123): [] __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/0:4/4804 Modules linked in: CPU: 0 UID: 0 PID: 4804 Comm: kworker/0:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff800099907840 x29: ffff8000999078f0 x28: dfff800000000000 x27: ffff0000c69d3880 x26: ffff800099907840 x25: dfff800000000000 x24: ffff700013320f08 x23: ffff800086fe98c0 x22: ffff0000c69c3000 x21: ffff800087070bc0 x20: ffff0000c69ca000 x19: 0000000000000000 x18: 1fffe00035b9ec28 x17: 0000000000000003 x16: ffff800088bf7000 x15: ffff800088ca7ee0 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000003 x11: ffff80008a6a6e28 x10: 0000000000000003 x9 : bf930c7a0def6b00 x8 : bf930c7a0def6b00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801561b4 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c69ca000 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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 115528 hardirqs last enabled at (115527): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1698 [inline] hardirqs last enabled at (115527): [] finish_lock_switch kernel/sched/core.c:5251 [inline] hardirqs last enabled at (115527): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5369 hardirqs last disabled at (115528): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (115476): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (115476): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673 softirqs last disabled at (115387): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---