------------[ 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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 00000000000018f0 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 263874 hardirqs last enabled at (263873): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (263874): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (263838): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (263838): [] rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline] softirqs last enabled at (263838): [] __dev_queue_xmit+0x14cc/0x2a9c net/core/dev.c:4961 softirqs last disabled at (263830): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (263830): [] rcu_read_lock_bh include/linux/rcupdate.h:902 [inline] softirqs last disabled at (263830): [] __dev_queue_xmit+0x1fc/0x2a9c net/core/dev.c:4844 ---[ 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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001936 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 264118 hardirqs last enabled at (264117): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (264118): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (264072): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (264072): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (263877): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 000000000000197c x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 264356 hardirqs last enabled at (264355): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (264356): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (264310): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (264310): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (264121): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 00000000000019c2 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 264600 hardirqs last enabled at (264599): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (264600): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (264554): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (264554): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (264359): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001a08 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 264648 hardirqs last enabled at (264647): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (264648): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (264554): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (264554): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (264359): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001a4e x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 264696 hardirqs last enabled at (264695): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (264696): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (264554): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (264554): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (264359): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001a94 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 265124 hardirqs last enabled at (265123): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (265124): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (265078): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (265078): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (264699): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001ada x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 265172 hardirqs last enabled at (265171): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (265172): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (265078): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (265078): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (264699): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001b20 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 265220 hardirqs last enabled at (265219): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (265220): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (265078): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (265078): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (264699): [] __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/0:2/1162 Modules linked in: CPU: 0 UID: 0 PID: 1162 Comm: kworker/0:2 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff8000949d7820 x29: ffff8000949d78d0 x28: dfff800000000000 x27: ffff0000c6a99880 x26: ffff8000949d7820 x25: dfff800000000000 x24: ffff70001293af04 x23: ffff800086eca2a0 x22: ffff0000c6bcb000 x21: ffff800086f515e0 x20: ffff0000c6bd2000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001b66 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1644fcd0620f0d00 x8 : 1644fcd0620f0d00 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6bd2000 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: 265454 hardirqs last enabled at (265453): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (265454): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (265408): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (265408): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (265223): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---