INFO: task syz-executor.1:5994 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26776 pid:5994 tgid:5993 ppid:18110 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1781/0x49d0 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline] __nbd_ioctl drivers/block/nbd.c:1524 [inline] nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1564 blkdev_ioctl+0x5e5/0x740 block/ioctl.c:640 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fc0ffc7dda9 RSP: 002b:00007fc0fefff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc0ffdabf80 RCX: 00007fc0ffc7dda9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 00007fc0ffcca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fc0ffdabf80 R15: 00007fff9ce6b928 INFO: task syz-executor.1:5998 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26384 pid:5998 tgid:5993 ppid:18110 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1781/0x49d0 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 blk_mq_freeze_queue_wait+0xff/0x190 block/blk-mq.c:138 nbd_set_size+0xce/0x650 drivers/block/nbd.c:363 nbd_ioctl+0x702/0xf40 drivers/block/nbd.c:1564 blkdev_ioctl+0x5e5/0x740 block/ioctl.c:640 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fc0ffc7dda9 RSP: 002b:00007fc0fefde0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc0ffdac050 RCX: 00007fc0ffc7dda9 RDX: 0000000000000006 RSI: 000000000000ab07 RDI: 0000000000000003 RBP: 00007fc0ffcca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fc0ffdac050 R15: 00007fff9ce6b928 INFO: task syz-executor.1:6000 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27384 pid:6000 tgid:5993 ppid:18110 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1781/0x49d0 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 bdev_open+0xdc/0xc90 block/bdev.c:862 blkdev_open+0x20d/0x2e0 block/fops.c:620 do_dentry_open+0x907/0x15a0 fs/open.c:955 do_open fs/namei.c:3642 [inline] path_openat+0x2860/0x3240 fs/namei.c:3799 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fc0ffc7c9a0 RSP: 002b:00007fc0fefbcc00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000002c000 RCX: 00007fc0ffc7c9a0 RDX: 000000000002c000 RSI: 00007fc0fefbcca0 RDI: 00000000ffffff9c RBP: 00007fc0fefbcca0 R08: 0000000000000000 R09: 002364626e2f7665 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 000000000000006e R14: 00007fc0ffdac120 R15: 00007fff9ce6b928 INFO: task syz-executor.1:6006 blocked for more than 144 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28920 pid:6006 tgid:5993 ppid:18110 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1781/0x49d0 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 blkdev_ioctl+0x5e5/0x740 block/ioctl.c:640 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fc0ffc7dda9 RSP: 002b:00007fc0fef9c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc0ffdac1f0 RCX: 00007fc0ffc7dda9 RDX: 00000000000001ff RSI: 000000000000ab01 RDI: 0000000000000003 RBP: 00007fc0ffcca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fc0ffdac1f0 R15: 00007fff9ce6b928 INFO: task syz-executor.1:6011 blocked for more than 144 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28920 pid:6011 tgid:5993 ppid:18110 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1781/0x49d0 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 blkdev_ioctl+0x5e5/0x740 block/ioctl.c:640 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fc0ffc7dda9 RSP: 002b:00007fc0fef7b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc0ffdac2c0 RCX: 00007fc0ffc7dda9 RDX: 0000000000000000 RSI: 000000000000ab04 RDI: 0000000000000003 RBP: 00007fc0ffcca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fc0ffdac2c0 R15: 00007fff9ce6b928 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 2 locks held by kworker/u8:2/39: 2 locks held by getty/4820: #0: ffff88802e6680a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f0e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201 3 locks held by kworker/u9:0/4814: #0: ffff88806635c148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff88806635c148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc90003667d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc90003667d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffff88805ad85060 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309 1 lock held by udevd/5720: #0: ffff88801ffd74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by udevd/5724: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by udevd/5903: #0: ffff88801fe634c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by udevd/5905: #0: ffff88801fe8d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.1/5994: #0: ffff88801fe76198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline] #0: ffff88801fe76198 (&nbd->config_lock){+.+.}-{3:3}, at: __nbd_ioctl drivers/block/nbd.c:1524 [inline] #0: ffff88801fe76198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1564 1 lock held by syz-executor.1/5998: #0: ffff88801fe76198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.1/6000: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.1/6006: #0: ffff88801fe76198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.1/6011: #0: ffff88801fe76198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.4/6137: #0: ffff88801ffe8198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline] #0: ffff88801ffe8198 (&nbd->config_lock){+.+.}-{3:3}, at: __nbd_ioctl drivers/block/nbd.c:1524 [inline] #0: ffff88801ffe8198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1564 1 lock held by syz-executor.4/6142: #0: ffff88801ffe8198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.4/6143: #0: ffff88801ffd74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.4/6145: #0: ffff88801ffe8198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.4/6147: #0: ffff88801ffe8198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.2/6177: #0: ffff88801fe84198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline] #0: ffff88801fe84198 (&nbd->config_lock){+.+.}-{3:3}, at: __nbd_ioctl drivers/block/nbd.c:1524 [inline] #0: ffff88801fe84198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1564 1 lock held by syz-executor.2/6182: #0: ffff88801fe84198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.2/6185: #0: ffff88801fe8d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.2/6188: #0: ffff88801fe84198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.2/6189: #0: ffff88801fe84198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.0/6186: #0: ffff88801fe70198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline] #0: ffff88801fe70198 (&nbd->config_lock){+.+.}-{3:3}, at: __nbd_ioctl drivers/block/nbd.c:1524 [inline] #0: ffff88801fe70198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1564 1 lock held by syz-executor.0/6190: #0: ffff88801fe70198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.0/6195: #0: ffff88801fe634c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.0/6197: #0: ffff88801fe70198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.0/6200: #0: ffff88801fe70198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.1/6249: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.1/6250: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by udevd/6266: #0: ffff88801ffd24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.3/6290: #0: ffff88801ffca198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline] #0: ffff88801ffca198 (&nbd->config_lock){+.+.}-{3:3}, at: __nbd_ioctl drivers/block/nbd.c:1524 [inline] #0: ffff88801ffca198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1564 1 lock held by syz-executor.3/6294: #0: ffff88801ffca198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1557 1 lock held by syz-executor.3/6295: #0: ffff88801ffd24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.4/6323: #0: ffff88801ffd74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.4/6324: #0: ffff88801ffd74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.2/6327: #0: ffff88801fe8d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.2/6328: #0: ffff88801fe8d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.0/6331: #0: ffff88801fe634c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.0/6332: #0: ffff88801fe634c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.1/6350: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.1/6351: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.3/6366: #0: ffff88801ffd24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.3/6367: #0: ffff88801ffd24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 4 locks held by kworker/0:1/6396: #0: ffff8880b943e318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988 #2: ffff8880b942a758 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1051 #3: ffffffff946aaa98 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x16d/0x510 lib/debugobjects.c:708 1 lock held by syz-executor.2/6416: #0: ffff88801fe8d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.0/6421: #0: ffff88801fe634c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.4/6426: #0: ffff88801ffd74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.4/6427: #0: ffff88801ffd74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.1/6445: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.1/6446: #0: ffff88801fe884c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.3/6462: #0: ffff88801ffd24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.3/6463: #0: ffff88801ffd24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.2/6498: #0: ffff88801fe8d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.2/6499: #0: ffff88801fe8d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.0/6518: #0: ffff88801fe634c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 1 lock held by syz-executor.4/6522: #0: ffff88801ffd74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfb0/0xff0 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4474 Comm: kworker/u8:3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:check_wait_context kernel/locking/lockdep.c:4789 [inline] RIP: 0010:__lock_acquire+0x717/0x1fd0 kernel/locking/lockdep.c:5087 Code: 10 84 c0 0f 85 1f 13 00 00 48 8b 04 24 8b 28 41 89 ec ff cd 0f 88 a5 00 00 00 89 eb 83 fd 31 73 7b 48 8d 04 9b 48 8d 5c c6 20 <48> 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 75 18 8b 1b 41 0f b6 04 16 RSP: 0018:ffffc900033ff590 EFLAGS: 00000083 RAX: 0000000000000005 RBX: ffff8880689e8b20 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: ffff8880689e8ad8 RDI: ffffffff92cae500 RBP: 0000000000000001 R08: ffffffff92cae507 R09: 1ffffffff2595ca0 R10: dffffc0000000000 R11: fffffbfff2595ca1 R12: 0000000000000002 R13: ffff8880689e8000 R14: 1ffff1100d13d16e R15: ffff8880689e8b70 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555561666938 CR3: 000000000df32000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 __debug_check_no_obj_freed lib/debugobjects.c:978 [inline] debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2078 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0xcc/0x2b0 mm/slub.c:4344 skb_kfree_head net/core/skbuff.c:1094 [inline] skb_free_head net/core/skbuff.c:1108 [inline] skb_release_data+0x556/0x870 net/core/skbuff.c:1136 skb_release_all net/core/skbuff.c:1202 [inline] __kfree_skb net/core/skbuff.c:1216 [inline] kfree_skb_reason+0x195/0x390 net/core/skbuff.c:1252 kfree_skb include/linux/skbuff.h:1267 [inline] ieee80211_iface_work+0x270/0xf10 net/mac80211/iface.c:1661 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:437 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243