------------[ 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/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000000e1a x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 43890 hardirqs last enabled at (43889): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (43890): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (43696): [] __alloc_skb+0x1c0/0x610 net/core/skbuff.c:698 softirqs last disabled at (43694): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (43694): [] __alloc_skb+0x1a8/0x610 net/core/skbuff.c:697 ---[ 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/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000000e60 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 43986 hardirqs last enabled at (43985): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (43986): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (43940): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (43940): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (43893): [] __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#1: kworker/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000000ea6 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 44228 hardirqs last enabled at (44227): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (44228): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (44182): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (44182): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (43989): [] __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#1: kworker/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000000eec x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 44476 hardirqs last enabled at (44475): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (44476): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (44430): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (44430): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (44231): [] __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#1: kworker/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000000f32 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 44734 hardirqs last enabled at (44733): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (44734): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (44688): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (44688): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (44479): [] __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#1: kworker/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 00000000c90f9c3e x17: ffff8001237d4000 x16: ffff80008f860000 x15: 0098968000000000 x14: 0000000000000f78 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 45020 hardirqs last enabled at (45019): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (45020): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (44974): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (44974): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (44737): [] __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#1: kworker/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 00000000c90f9c3e x17: ffff8001237d4000 x16: ffff80008f860000 x15: 0098968000000000 x14: 0000000000000fbe x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 45312 hardirqs last enabled at (45311): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (45312): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (45230): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (45230): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (45023): [] __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#1: kworker/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 0000000000001004 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 45558 hardirqs last enabled at (45557): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (45558): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (45512): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (45512): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (45315): [] __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#1: kworker/1:5/4847 Modules linked in: CPU: 1 UID: 0 PID: 4847 Comm: kworker/1:5 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 : ffff800099b27820 x29: ffff800099b278d0 x28: dfff800000000000 x27: ffff0000c6da8080 x26: ffff800099b27820 x25: dfff800000000000 x24: ffff700013364f04 x23: ffff800086f24ce0 x22: ffff0000c6dc7000 x21: ffff800086fac020 x20: ffff0000c6e58000 x19: 0000000000000000 x18: 1fffe000359eee28 x17: 0000000000000003 x16: ffff8000897f7000 x15: ffff8000898a76c0 x14: 000000000000104a x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 03d0e46b9c779000 x8 : 03d0e46b9c779000 x7 : ffff800080484084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f4d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e58000 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: 45836 hardirqs last enabled at (45835): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (45836): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (45790): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (45790): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (45561): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---