------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 00000000000065f9 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 99568 hardirqs last enabled at (99567): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (99567): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (99568): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99446): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (99446): [] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] softirqs last enabled at (99446): [] wg_packet_decrypt_worker+0x930/0x9b8 drivers/net/wireguard/receive.c:499 softirqs last disabled at (99444): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (99444): [] ptr_ring_consume_bh include/linux/ptr_ring.h:375 [inline] softirqs last disabled at (99444): [] wg_packet_decrypt_worker+0x5f8/0x9b8 drivers/net/wireguard/receive.c:499 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 99658 hardirqs last enabled at (99657): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (99657): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (99658): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99446): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (99446): [] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] softirqs last enabled at (99446): [] wg_packet_decrypt_worker+0x930/0x9b8 drivers/net/wireguard/receive.c:499 softirqs last disabled at (99444): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (99444): [] ptr_ring_consume_bh include/linux/ptr_ring.h:375 [inline] softirqs last disabled at (99444): [] wg_packet_decrypt_worker+0x5f8/0x9b8 drivers/net/wireguard/receive.c:499 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 99714 hardirqs last enabled at (99713): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (99713): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (99714): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99446): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (99446): [] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] softirqs last enabled at (99446): [] wg_packet_decrypt_worker+0x930/0x9b8 drivers/net/wireguard/receive.c:499 softirqs last disabled at (99444): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (99444): [] ptr_ring_consume_bh include/linux/ptr_ring.h:375 [inline] softirqs last disabled at (99444): [] wg_packet_decrypt_worker+0x5f8/0x9b8 drivers/net/wireguard/receive.c:499 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 99770 hardirqs last enabled at (99769): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (99769): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (99770): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99446): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (99446): [] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] softirqs last enabled at (99446): [] wg_packet_decrypt_worker+0x930/0x9b8 drivers/net/wireguard/receive.c:499 softirqs last disabled at (99444): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (99444): [] ptr_ring_consume_bh include/linux/ptr_ring.h:375 [inline] softirqs last disabled at (99444): [] wg_packet_decrypt_worker+0x5f8/0x9b8 drivers/net/wireguard/receive.c:499 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 99826 hardirqs last enabled at (99825): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (99825): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (99826): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99446): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (99446): [] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] softirqs last enabled at (99446): [] wg_packet_decrypt_worker+0x930/0x9b8 drivers/net/wireguard/receive.c:499 softirqs last disabled at (99444): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (99444): [] ptr_ring_consume_bh include/linux/ptr_ring.h:375 [inline] softirqs last disabled at (99444): [] wg_packet_decrypt_worker+0x5f8/0x9b8 drivers/net/wireguard/receive.c:499 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 99882 hardirqs last enabled at (99881): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (99881): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (99882): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99446): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (99446): [] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] softirqs last enabled at (99446): [] wg_packet_decrypt_worker+0x930/0x9b8 drivers/net/wireguard/receive.c:499 softirqs last disabled at (99444): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (99444): [] ptr_ring_consume_bh include/linux/ptr_ring.h:375 [inline] softirqs last disabled at (99444): [] wg_packet_decrypt_worker+0x5f8/0x9b8 drivers/net/wireguard/receive.c:499 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 99938 hardirqs last enabled at (99937): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (99937): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (99938): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99446): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (99446): [] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] softirqs last enabled at (99446): [] wg_packet_decrypt_worker+0x930/0x9b8 drivers/net/wireguard/receive.c:499 softirqs last disabled at (99444): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (99444): [] ptr_ring_consume_bh include/linux/ptr_ring.h:375 [inline] softirqs last disabled at (99444): [] wg_packet_decrypt_worker+0x5f8/0x9b8 drivers/net/wireguard/receive.c:499 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 100050 hardirqs last enabled at (100049): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (100049): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (100050): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99998): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (99998): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (99989): [] __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:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#0: kworker/0:1/10 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097cd7820 x29: ffff800097cd7910 x28: 0000000000006852 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe0001953c074 x24: ffff700012f9af0c x23: ffff80008c3341a0 x22: ffff0000ca9aa000 x21: ffff80008c5c1680 x20: ffff0000ca9e0000 x19: 0000000000000000 x18: 1fffe0003377d090 x17: ffff80008f86e000 x16: ffff800082e5e68c x15: 0000000000000001 x14: 1fffe0003377fb48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093398d48 x10: 0000000000000003 x9 : 84f6453e8996a300 x8 : 84f6453e8996a300 x7 : ffff80008049ea88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9ce0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 100106 hardirqs last enabled at (100105): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (100105): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (100106): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (99998): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (99998): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (99989): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]---