------------[ 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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000000fba x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 341846 hardirqs last enabled at (341845): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (341846): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (341714): [] spin_unlock_bh include/linux/spinlock.h:407 [inline] softirqs last enabled at (341714): [] ptr_ring_consume_bh include/linux/ptr_ring.h:399 [inline] softirqs last enabled at (341714): [] wg_packet_encrypt_worker+0x120c/0x1290 drivers/net/wireguard/send.c:293 softirqs last disabled at (341712): [] spin_lock_bh include/linux/spinlock.h:353 [inline] softirqs last disabled at (341712): [] ptr_ring_consume_bh include/linux/ptr_ring.h:397 [inline] softirqs last disabled at (341712): [] wg_packet_encrypt_worker+0xfbc/0x1290 drivers/net/wireguard/send.c:293 ---[ 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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 0000000000001004 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 341956 hardirqs last enabled at (341955): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (341956): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (341910): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (341910): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (341849): [] __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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 000000000000104a x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 342196 hardirqs last enabled at (342195): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (342196): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (342150): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (342150): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (341959): [] __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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: 0000000000000000 x14: 0000000000001090 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 342406 hardirqs last enabled at (342405): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (342406): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (342360): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (342360): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (342199): [] __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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 00000000000010d6 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 342636 hardirqs last enabled at (342635): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (342636): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (342590): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (342590): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (342409): [] __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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: 0000000000000000 x14: 0000000000001121 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 342902 hardirqs last enabled at (342901): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (342902): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (342856): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (342856): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (342639): [] __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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: 0000000000000000 x14: 0000000000001167 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 343106 hardirqs last enabled at (343105): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (343106): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (343060): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (343060): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (342905): [] __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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: ffff800088b27780 x14: 00000000000011ad x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 343336 hardirqs last enabled at (343335): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (343336): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (343290): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (343290): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (343109): [] __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/0:2/1154 Modules linked in: CPU: 0 UID: 0 PID: 1154 Comm: kworker/0:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff800093827820 x29: ffff8000938278d0 x28: dfff800000000000 x27: ffff0000c6541880 x26: ffff800093827820 x25: dfff800000000000 x24: ffff700012704f04 x23: ffff800086eca2a0 x22: ffff0000c6693000 x21: ffff800086f515e0 x20: ffff0000c669a000 x19: 0000000000000000 x18: 1fffe00035bd4c28 x17: 0000000000000003 x16: ffff800088a77000 x15: 0000000000000000 x14: 00000000000011f3 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : c8493ba70228df00 x8 : c8493ba70228df00 x7 : ffff800080483164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3e60 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c669a000 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: 343540 hardirqs last enabled at (343539): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (343540): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (343494): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (343494): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (343339): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---