------------[ 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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 0000000000001491 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 418012 hardirqs last enabled at (418011): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (418012): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (417972): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (417972): [] rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline] softirqs last enabled at (417972): [] __dev_queue_xmit+0x14cc/0x2a68 net/core/dev.c:4993 softirqs last disabled at (417956): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (417956): [] rcu_read_lock_bh include/linux/rcupdate.h:902 [inline] softirqs last disabled at (417956): [] __dev_queue_xmit+0x1fc/0x2a68 net/core/dev.c:4872 ---[ 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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 00000000000014d7 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 418216 hardirqs last enabled at (418215): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (418216): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (418170): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (418170): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418015): [] __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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 000000000000151f x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 418280 hardirqs last enabled at (418279): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (418280): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (418234): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (418234): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418219): [] __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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 000000000000156a x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 418482 hardirqs last enabled at (418481): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (418482): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (418436): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (418436): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418283): [] __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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 00000000000015b0 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 418684 hardirqs last enabled at (418683): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (418684): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (418638): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (418638): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418485): [] __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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 00000000000015f6 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 418900 hardirqs last enabled at (418899): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (418900): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (418854): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (418854): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418687): [] __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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 000000000000163c x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 418948 hardirqs last enabled at (418947): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (418948): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (418854): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (418854): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418687): [] __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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 0000000000001682 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 419148 hardirqs last enabled at (419147): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (419148): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (419102): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (419102): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418951): [] __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/1:3/4795 Modules linked in: CPU: 1 UID: 0 PID: 4795 Comm: kworker/1:3 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 : ffff800096e37820 x29: ffff800096e378d0 x28: dfff800000000000 x27: ffff0000c6b78880 x26: ffff800096e37820 x25: dfff800000000000 x24: ffff700012dc6f04 x23: ffff800086edcca0 x22: ffff0000c6e0f000 x21: ffff800086f63fe0 x20: ffff0000c6e84000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff800089847700 x14: 00000000000016c8 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 945c5ea41f8bb100 x8 : 945c5ea41f8bb100 x7 : ffff800080482944 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3620 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6e84000 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: 419196 hardirqs last enabled at (419195): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (419196): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (419102): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (419102): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (418951): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---