------------[ 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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000cc9 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 70186 hardirqs last enabled at (70185): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (70186): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (69958): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (69958): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (69937): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000d0f x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 70290 hardirqs last enabled at (70289): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (70290): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (70244): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (70244): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (70189): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000d55 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 70424 hardirqs last enabled at (70423): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (70424): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (70378): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (70378): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (70293): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000d9b x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 70538 hardirqs last enabled at (70537): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (70538): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (70492): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (70492): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (70427): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000de1 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 70992 hardirqs last enabled at (70991): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (70992): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (70946): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (70946): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (70541): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000e27 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 71434 hardirqs last enabled at (71433): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (71434): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (71388): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (71388): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (70995): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000e6d x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 71918 hardirqs last enabled at (71917): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (71918): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (71872): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (71872): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (71437): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000eb3 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 72388 hardirqs last enabled at (72387): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (72388): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (72342): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (72342): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (71921): [] __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/0:4/4779 Modules linked in: CPU: 0 UID: 0 PID: 4779 Comm: kworker/0:4 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 : ffff800096557820 x29: ffff8000965578d0 x28: dfff800000000000 x27: ffff0000c4a6f080 x26: ffff800096557820 x25: dfff800000000000 x24: ffff700012caaf04 x23: ffff800086eca2a0 x22: ffff0000c676c000 x21: ffff800086f515e0 x20: ffff0000c68b0000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: 0000000000000000 x14: 0000000000000ef9 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1a710b029b1a3400 x8 : 1a710b029b1a3400 x7 : ffff800080483190 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c68b0000 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: 72840 hardirqs last enabled at (72839): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (72840): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (72794): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (72794): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (72391): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---