Hello, syzbot found the following issue on: HEAD commit: f837f0a3c948 Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13c9adbea80000 kernel config: https://syzkaller.appspot.com/x/.config?x=d98efd5949c43d64 dashboard link: https://syzkaller.appspot.com/bug?extid=f0f99b966af80ec818db compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-f837f0a3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/eafb76f00a9a/vmlinux-f837f0a3.xz kernel image: https://storage.googleapis.com/syzbot-assets/e48f89fd580f/bzImage-f837f0a3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f0f99b966af80ec818db@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task swapper/0:1 blocked for more than 143 seconds. Not tainted 6.5.0-rc3-syzkaller-00225-gf837f0a3c948 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:swapper/0 state:D stack:22144 pid:1 ppid:0 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5381 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6710 schedule+0xe7/0x1b0 kernel/sched/core.c:6786 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __ww_mutex_lock.constprop.0+0x133b/0x2f50 kernel/locking/mutex.c:754 ww_mutex_lock+0x37/0x140 kernel/locking/mutex.c:871 modeset_lock+0x482/0x6b0 drivers/gpu/drm/drm_modeset_lock.c:314 drm_modeset_lock drivers/gpu/drm/drm_modeset_lock.c:396 [inline] drm_modeset_lock+0x59/0x90 drivers/gpu/drm/drm_modeset_lock.c:392 drm_atomic_get_plane_state+0x199/0x580 drivers/gpu/drm/drm_atomic.c:544 drm_client_modeset_commit_atomic+0x246/0x810 drivers/gpu/drm/drm_client_modeset.c:1003 drm_client_modeset_commit_locked+0x14d/0x570 drivers/gpu/drm/drm_client_modeset.c:1154 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1370 [inline] drm_fb_helper_pan_display+0x2a5/0x990 drivers/gpu/drm/drm_fb_helper.c:1430 fb_pan_display+0x477/0x7c0 drivers/video/fbdev/core/fbmem.c:819 bit_update_start+0x49/0x1f0 drivers/video/fbdev/core/bitblit.c:390 fbcon_switch+0xbb1/0x12e0 drivers/video/fbdev/core/fbcon.c:2167 redraw_screen+0x2bd/0x750 drivers/tty/vt/vt.c:970 con2fb_init_display drivers/video/fbdev/core/fbcon.c:805 [inline] set_con2fb_map+0x793/0x1050 drivers/video/fbdev/core/fbcon.c:864 do_fb_registered drivers/video/fbdev/core/fbcon.c:3004 [inline] fbcon_fb_registered+0x21d/0x660 drivers/video/fbdev/core/fbcon.c:3020 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:1497 [inline] register_framebuffer+0x530/0x940 drivers/video/fbdev/core/fbmem.c:1571 __drm_fb_helper_initial_config_and_unlock+0xd7c/0x1600 drivers/gpu/drm/drm_fb_helper.c:1871 drm_fb_helper_initial_config drivers/gpu/drm/drm_fb_helper.c:1936 [inline] drm_fb_helper_initial_config+0x44/0x60 drivers/gpu/drm/drm_fb_helper.c:1928 drm_fbdev_generic_client_hotplug+0x1a7/0x270 drivers/gpu/drm/drm_fbdev_generic.c:280 drm_client_register+0x195/0x280 drivers/gpu/drm/drm_client.c:149 drm_fbdev_generic_setup+0x11c/0x330 drivers/gpu/drm/drm_fbdev_generic.c:342 virtio_gpu_probe+0x1be/0x3b0 drivers/gpu/drm/virtio/virtgpu_drv.c:105 virtio_dev_probe+0x56c/0x870 drivers/virtio/virtio.c:305 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x234/0xc90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:798 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:828 __driver_attach+0x274/0x570 drivers/base/dd.c:1214 bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368 bus_add_driver+0x2e9/0x630 drivers/base/bus.c:673 driver_register+0x15c/0x4a0 drivers/base/driver.c:246 do_one_initcall+0x117/0x630 init/main.c:1232 do_initcall_level init/main.c:1294 [inline] do_initcalls init/main.c:1310 [inline] do_basic_setup init/main.c:1329 [inline] kernel_init_freeable+0x5bd/0x8f0 init/main.c:1546 kernel_init+0x1c/0x2a0 init/main.c:1437 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> INFO: task kworker/0:1:8 blocked for more than 143 seconds. Not tainted 6.5.0-rc3-syzkaller-00225-gf837f0a3c948 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:27952 pid:8 ppid:2 flags:0x00004000 Workqueue: events virtio_gpu_dequeue_ctrl_func Call Trace: <TASK> context_switch kernel/sched/core.c:5381 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6710 schedule+0xe7/0x1b0 kernel/sched/core.c:6786 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747 drm_client_dev_hotplug drivers/gpu/drm/drm_client.c:227 [inline] drm_client_dev_hotplug+0x169/0x3c0 drivers/gpu/drm/drm_client.c:214 virtio_gpu_cmd_get_display_info_cb+0x3e1/0x550 drivers/gpu/drm/virtio/virtgpu_vq.c:674 virtio_gpu_dequeue_ctrl_func+0x209/0x7d0 drivers/gpu/drm/virtio/virtgpu_vq.c:235 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597 worker_thread+0x687/0x1110 kernel/workqueue.c:2748 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> INFO: task kworker/0:2:821 blocked for more than 143 seconds. Not tainted 6.5.0-rc3-syzkaller-00225-gf837f0a3c948 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:27416 pid:821 ppid:2 flags:0x00004000 Workqueue: events drm_fb_helper_damage_work Call Trace: <TASK> context_switch kernel/sched/core.c:5381 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6710 schedule+0xe7/0x1b0 kernel/sched/core.c:6786 virtio_gpu_queue_ctrl_sgs drivers/gpu/drm/virtio/virtgpu_vq.c:341 [inline] virtio_gpu_queue_fenced_ctrl_buffer+0x497/0xff0 drivers/gpu/drm/virtio/virtgpu_vq.c:415 virtio_gpu_resource_flush drivers/gpu/drm/virtio/virtgpu_plane.c:152 [inline] virtio_gpu_primary_plane_update+0x1057/0x1590 drivers/gpu/drm/virtio/virtgpu_plane.c:227 drm_atomic_helper_commit_planes+0x477/0xc00 drivers/gpu/drm/drm_atomic_helper.c:2756 drm_atomic_helper_commit_tail+0x69/0xf0 drivers/gpu/drm/drm_atomic_helper.c:1738 commit_tail+0x32c/0x410 drivers/gpu/drm/drm_atomic_helper.c:1823 drm_atomic_helper_commit+0x2f9/0x380 drivers/gpu/drm/drm_atomic_helper.c:2061 drm_atomic_commit+0x20b/0x2d0 drivers/gpu/drm/drm_atomic.c:1513 drm_atomic_helper_dirtyfb+0x611/0x7b0 drivers/gpu/drm/drm_damage_helper.c:181 drm_fbdev_generic_helper_fb_dirty+0x823/0xbb0 drivers/gpu/drm/drm_fbdev_generic.c:231 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:390 [inline] drm_fb_helper_damage_work+0x283/0x5e0 drivers/gpu/drm/drm_fb_helper.c:413 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597 process_scheduled_works kernel/workqueue.c:2664 [inline] worker_thread+0x896/0x1110 kernel/workqueue.c:2750 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Showing all locks held in the system: 9 locks held by swapper/0/1: #0: ffff88810512c170 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline] #0: ffff88810512c170 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1093 [inline] #0: ffff88810512c170 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x269/0x570 drivers/base/dd.c:1213 #1: ffff88801fb722f8 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_register+0x54/0x280 drivers/gpu/drm/drm_client.c:135 #2: ffffffff8d3e3e28 (registration_lock){+.+.}-{3:3}, at: register_framebuffer+0x7a/0x940 drivers/video/fbdev/core/fbmem.c:1570 #3: ffffffff8c990da0 (console_lock){+.+.}-{0:0}, at: fbcon_fb_registered+0x3c/0x660 drivers/video/fbdev/core/fbcon.c:3016 #4: ffff88810611e280 (&helper->lock){+.+.}-{3:3}, at: drm_fb_helper_pan_display+0xd5/0x990 drivers/gpu/drm/drm_fb_helper.c:1423 #5: ffff88801fb721b0 (&dev->master_mutex){+.+.}-{3:3}, at: drm_master_internal_acquire+0x21/0x70 drivers/gpu/drm/drm_auth.c:457 #6: ffff88810611e098 (&client->modeset_mutex){+.+.}-{3:3}, at: drm_client_modeset_commit_locked+0x4c/0x570 drivers/gpu/drm/drm_client_modeset.c:1152 #7: ffffc90000267330 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_client_modeset_commit_atomic+0xd0/0x810 drivers/gpu/drm/drm_client_modeset.c:990 #8: ffff88801e4cd8b0 (crtc_ww_class_mutex){+.+.}-{3:3}, at: modeset_lock+0x482/0x6b0 drivers/gpu/drm/drm_modeset_lock.c:314 3 locks held by kworker/0:1/8: #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2567 #1: ffffc900002d7d80 ((work_completion)(&vgvq->dequeue_work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2571 #2: ffff88801fb722f8 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_dev_hotplug drivers/gpu/drm/drm_client.c:227 [inline] #2: ffff88801fb722f8 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_dev_hotplug+0x169/0x3c0 drivers/gpu/drm/drm_client.c:214 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8c9a2730 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8c9a2430 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/40: #0: ffffffff8c9a3340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 2 locks held by kworker/u17:2/54: #0: ffff888012878138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888012878138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888012878138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888012878138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888012878138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff888012878138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff888012878138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2567 #1: ffffc90000c87d80 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2571 5 locks held by kworker/0:2/821: #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff888012869d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2567 #1: ffffc90004cb7d80 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2571 #2: ffffc90004cb7a40 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0xb5/0x7b0 drivers/gpu/drm/drm_damage_helper.c:123 #3: ffff88801e4cd8b0 (crtc_ww_class_mutex){+.+.}-{3:3}, at: modeset_lock+0x482/0x6b0 drivers/gpu/drm/drm_modeset_lock.c:314 #4: ffffffff8d51c4b0 (drm_unplug_srcu){.+.+}-{0:0}, at: drm_dev_enter+0x4/0x160 drivers/gpu/drm/drm_drv.c:450 ============================================= --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
