------------[ 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/0:0/9 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G L syzkaller #0 PREEMPT Tainted: [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 : ffff80008f957820 x29: ffff80008f9578d0 x28: dfff800000000000 x27: ffff0000c4cb6880 x26: ffff80008f957820 x25: dfff800000000000 x24: ffff700011f2af04 x23: ffff800086f24ce0 x22: ffff0000c6754000 x21: ffff800086fac020 x20: ffff0000c6af0000 x19: 0000000000000000 x18: 1fffe000359ea228 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 00000000000504b8 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 05ac17f76194c100 x8 : 05ac17f76194c100 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6af0000 dump_backtrace(regs = 0000000052d49a33 tsk = 0000000000000000) 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: 406930 hardirqs last enabled at (406929): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (406929): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (406930): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (406902): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (406902): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (406879): [] __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/0:0/9 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G W L syzkaller #0 PREEMPT Tainted: [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 : ffff80008f957820 x29: ffff80008f9578d0 x28: dfff800000000000 x27: ffff0000c4cb6880 x26: ffff80008f957820 x25: dfff800000000000 x24: ffff700011f2af04 x23: ffff800086f24ce0 x22: ffff0000c6754000 x21: ffff800086fac020 x20: ffff0000c6af0000 x19: 0000000000000000 x18: 1fffe000359ea228 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 00000000000504fd x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 05ac17f76194c100 x8 : 05ac17f76194c100 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6af0000 dump_backtrace(regs = 0000000052d49a33 tsk = 0000000000000000) 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: 406930 hardirqs last enabled at (406929): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (406929): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (406930): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (406902): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (406902): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (406879): [] __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/0:0/9 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G W L syzkaller #0 PREEMPT Tainted: [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 : ffff80008f957820 x29: ffff80008f9578d0 x28: dfff800000000000 x27: ffff0000c4cb6880 x26: ffff80008f957820 x25: dfff800000000000 x24: ffff700011f2af04 x23: ffff800086f24ce0 x22: ffff0000c6754000 x21: ffff800086fac020 x20: ffff0000c6af0000 x19: 0000000000000000 x18: 1fffe000359ea228 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000050546 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 05ac17f76194c100 x8 : 05ac17f76194c100 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6af0000 dump_backtrace(regs = 0000000052d49a33 tsk = 0000000000000000) 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: 406930 hardirqs last enabled at (406929): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (406929): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (406930): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (406902): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (406902): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (406879): [] __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/0:0/9 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G W L syzkaller #0 PREEMPT Tainted: [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 : ffff80008f957820 x29: ffff80008f9578d0 x28: dfff800000000000 x27: ffff0000c4cb6880 x26: ffff80008f957820 x25: dfff800000000000 x24: ffff700011f2af04 x23: ffff800086f24ce0 x22: ffff0000c6754000 x21: ffff800086fac020 x20: ffff0000c6af0000 x19: 0000000000000000 x18: 1fffe000359ea228 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000050591 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 05ac17f76194c100 x8 : 05ac17f76194c100 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6af0000 dump_backtrace(regs = 0000000052d49a33 tsk = 0000000000000000) 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: 406930 hardirqs last enabled at (406929): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (406929): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (406930): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (406902): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (406902): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (406879): [] __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/0:0/9 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G W L syzkaller #0 PREEMPT Tainted: [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 : ffff80008f957820 x29: ffff80008f9578d0 x28: dfff800000000000 x27: ffff0000c4cb6880 x26: ffff80008f957820 x25: dfff800000000000 x24: ffff700011f2af04 x23: ffff800086f24ce0 x22: ffff0000c6754000 x21: ffff800086fac020 x20: ffff0000c6af0000 x19: 0000000000000000 x18: 1fffe000359ea228 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 00000000000505da x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 05ac17f76194c100 x8 : 05ac17f76194c100 x7 : 0000000000000000 x6 : ffff800080484084 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6af0000 dump_backtrace(regs = 0000000052d49a33 tsk = 0000000000000000) 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: 406930 hardirqs last enabled at (406929): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (406929): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (406930): [] __schedule+0x2f8/0x2b00 kernel/sched/core.c:7137 softirqs last enabled at (406902): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (406902): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (406879): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---