------------[ 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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 0000000000000548 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 17414 hardirqs last enabled at (17413): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (17414): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (17340): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (17340): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (17315): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 000000000000059c x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 17530 hardirqs last enabled at (17529): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (17530): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (17484): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (17484): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (17417): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 00000000000005e2 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 17646 hardirqs last enabled at (17645): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (17646): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (17600): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (17600): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (17533): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 0000000000000637 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 17776 hardirqs last enabled at (17775): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (17776): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (17730): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (17730): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (17649): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 000000000000067d x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 17860 hardirqs last enabled at (17859): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (17860): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (17814): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (17814): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (17779): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 00000000000006d2 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 17966 hardirqs last enabled at (17965): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (17966): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (17920): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (17920): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (17863): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 0000000000000718 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 18082 hardirqs last enabled at (18081): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (18082): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (18036): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (18036): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (17969): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 1fffe000349fbc28 x17: 0000000000000003 x16: ffff800089797000 x15: ffff8000898476c0 x14: 000000000000075e x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 18176 hardirqs last enabled at (18175): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (18176): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (18130): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (18130): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (18085): [] __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/1:3/4856 Modules linked in: CPU: 1 UID: 0 PID: 4856 Comm: kworker/1:3 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN 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 : ffff80009b017820 x29: ffff80009b0178d0 x28: dfff800000000000 x27: ffff0000c6bf8080 x26: ffff80009b017820 x25: dfff800000000000 x24: ffff700013602f04 x23: ffff800086edcfa0 x22: ffff0000c6c2f000 x21: ffff800086f642e0 x20: ffff0000c6c78000 x19: 0000000000000000 x18: 00000000c593194a x17: ffff80011b89c000 x16: ffff80008f7f0000 x15: 0098968000000000 x14: 00000000000007a4 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 48896649cc4a1c00 x8 : 48896649cc4a1c00 x7 : ffff800080483084 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c6c78000 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: 18312 hardirqs last enabled at (18311): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (18312): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (18266): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (18266): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (18179): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---