------------[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000002 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : ffff80008048c5b8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f6830 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 59466 hardirqs last enabled at (59465): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (59465): [] __arm64_exit_to_kernel_mode+0x64/0x78 arch/arm64/kernel/entry-common.c:60 hardirqs last disabled at (59466): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (59190): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (59190): [] srcu_invoke_callbacks+0x32c/0x8f0 kernel/rcu/srcutree.c:1918 softirqs last disabled at (59186): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (59186): [] srcu_invoke_callbacks+0x304/0x8f0 kernel/rcu/srcutree.c:1916 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 59676 hardirqs last enabled at (59675): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (59675): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (59675): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (59676): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (59624): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (59624): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (59469): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 59890 hardirqs last enabled at (59889): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (59889): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (59889): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (59890): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (59838): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (59838): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (59679): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5dba14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 59946 hardirqs last enabled at (59945): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (59945): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (59945): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (59946): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (59838): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (59838): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (59679): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5dba14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 60002 hardirqs last enabled at (60001): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (60001): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (60001): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (60002): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (59838): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (59838): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (59679): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5dba14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 60058 hardirqs last enabled at (60057): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (60057): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (60057): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (60058): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (59838): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (59838): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (59679): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000002 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : ffff80008048c5b8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f6830 x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 60262 hardirqs last enabled at (60261): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (60261): [] __arm64_exit_to_kernel_mode+0x64/0x78 arch/arm64/kernel/entry-common.c:60 hardirqs last disabled at (60262): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (60212): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (60212): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (60061): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5dba14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 60318 hardirqs last enabled at (60317): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (60317): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (60317): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (60318): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (60212): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (60212): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (60061): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5dba14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 60526 hardirqs last enabled at (60525): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (60525): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (60525): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (60526): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (60474): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (60474): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (60321): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ 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/0:7/4817 Modules linked in: CPU: 0 UID: 0 PID: 4817 Comm: kworker/0:7 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 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 : ffff8000a9ac7820 x29: ffff8000a9ac78d0 x28: dfff800000000000 x27: ffff0000c6e08880 x26: ffff8000a9ac7820 x25: dfff800000000000 x24: ffff700015358f04 x23: ffff800086f58200 x22: ffff0000c7003000 x21: ffff800086fddb60 x20: ffff0000c7026000 x19: 0000000000000000 x18: 1fffe00034bb7428 x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220 x14: ffff0001a5dba14c x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 21ed23da89aba000 x8 : 21ed23da89aba000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080156118 x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7026000 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:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 60582 hardirqs last enabled at (60581): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] hardirqs last enabled at (60581): [] finish_lock_switch kernel/sched/core.c:5241 [inline] hardirqs last enabled at (60581): [] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359 hardirqs last disabled at (60582): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (60474): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (60474): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (60321): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]---