------------[ 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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: 0000000000000000 x14: 0000000000756b60 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 000000000075b437 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: 0000000000000000 x14: 000000000075b47e x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: 0000000000000000 x14: 000000000075b4c6 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 000000000075b50c x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 000000000075b556 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: 0000000000000000 x14: 000000000075b5a0 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: 0000000000000000 x14: 000000000075b5ec x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __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#1: kworker/1:4/1510 Modules linked in: CPU: 1 UID: 0 PID: 1510 Comm: kworker/1:4 Tainted: G B W L syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff800095747820 x29: ffff8000957478d0 x28: dfff800000000000 x27: ffff0000c7171880 x26: ffff800095747820 x25: dfff800000000000 x24: ffff700012ae8f04 x23: ffff800086f24ce0 x22: ffff0000c6fdd000 x21: ffff800086fac020 x20: ffff0000c716e000 x19: 0000000000000000 x18: ffff8000949d5074 x17: ffff8001237d4000 x16: ffff80008f860000 x15: 0098968000000000 x14: 000000000075b633 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c42a56ddd9bf9600 x8 : c42a56ddd9bf9600 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c716e000 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:854 irq event stamp: 182442 hardirqs last enabled at (182441): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (182441): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (182442): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (182356): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (182356): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (182255): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---