------------[ 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/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000002 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : ffff80008048c5b8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f6830 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 61162 hardirqs last enabled at (61161): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (61161): [] __arm64_exit_to_kernel_mode+0x64/0x78 arch/arm64/kernel/entry-common.c:60 hardirqs last disabled at (61162): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (61088): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (61088): [] nsim_fib_event_work+0x188/0x320 drivers/net/netdevsim/fib.c:1488 softirqs last disabled at (61086): [] spin_lock_bh include/linux/spinlock.h:348 [inline] softirqs last disabled at (61086): [] 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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 61432 hardirqs last enabled at (61431): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61431): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61431): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61432): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (61380): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61380): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61165): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 61658 hardirqs last enabled at (61657): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61657): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61657): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61658): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (61606): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61606): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61435): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000002 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 61900 hardirqs last enabled at (61899): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (61899): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (61899): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (61900): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (61848): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (61848): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61661): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 62150 hardirqs last enabled at (62149): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62149): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62149): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62150): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (62098): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62098): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (61903): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 62396 hardirqs last enabled at (62395): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62395): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62395): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62396): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (62344): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62344): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62153): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 62644 hardirqs last enabled at (62643): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62643): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62643): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62644): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (62592): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62592): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62399): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 62736 hardirqs last enabled at (62735): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62735): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62735): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62736): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (62684): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62684): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62647): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 62828 hardirqs last enabled at (62827): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62827): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62827): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62828): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (62776): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62776): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62739): [] __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#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP 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 : ffff80008ed87820 x29: ffff80008ed878d0 x28: dfff800000000000 x27: ffff0000c5017080 x26: ffff80008ed87820 x25: dfff800000000000 x24: ffff700011db0f04 x23: ffff800086f58200 x22: ffff0000c7219000 x21: ffff800086fddb60 x20: ffff0000c7244000 x19: 0000000000000000 x18: 1fffe00034bbbe28 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5ddf14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 467596e1a0762100 x8 : 467596e1a0762100 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7244000 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:838 irq event stamp: 62928 hardirqs last enabled at (62927): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (62927): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (62927): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (62928): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (62876): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (62876): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (62831): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]---