INFO: task syz-executor:6531 blocked for more than 144 seconds. Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6531 tgid:6531 ppid:1 task_flags:0x400140 flags:0x00000019 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:737 (T) context_switch kernel/sched/core.c:5396 [inline] __schedule+0x1414/0x2a28 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6878 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6935 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 kmem_cache_destroy+0x58/0x178 mm/slab_common.c:511 bio_put_slab block/bio.c:155 [inline] bioset_exit+0x2e8/0x3dc block/bio.c:1758 bch2_fs_fs_io_direct_exit+0x30/0x40 fs/bcachefs/fs-io-direct.c:686 __bch2_fs_free fs/bcachefs/super.c:603 [inline] bch2_fs_release+0x238/0x770 fs/bcachefs/super.c:667 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2b0/0x438 lib/kobject.c:737 bch2_fs_free+0x46c/0x4e0 fs/bcachefs/super.c:734 bch2_kill_sb+0x48/0x58 fs/bcachefs/fs.c:2620 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1417 __cleanup_mnt+0x20/0x30 fs/namespace.c:1424 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/14: 2 locks held by kworker/1:0/24: 2 locks held by kworker/1:1/26: 1 lock held by khungtaskd/32: #0: ffff80008f859a00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/41: 3 locks held by kworker/u8:3/42: 2 locks held by kswapd0/74: 4 locks held by kworker/u8:4/208: 4 locks held by kworker/u8:5/273: 3 locks held by kworker/u8:6/542: 3 locks held by kworker/u8:7/562: 3 locks held by kworker/u8:8/614: 3 locks held by kworker/u8:9/640: 3 locks held by kworker/u8:10/772: 2 locks held by kworker/0:2/1818: 3 locks held by kworker/R-ipv6_/4173: #0: ffff0000d2a33148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009ff27ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928b54e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by jbd2/nvme0n1p2-/6107: 1 lock held by klogd/6131: 2 locks held by getty/6292: #0: ffff0000d24fe0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba3b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6515: 3 locks held by syz-executor/6525: 4 locks held by kworker/0:3/6528: 3 locks held by syz-executor/6531: #0: ffff80008ff8b6e8 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline] #0: ffff80008ff8b6e8 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x1f8/0x3dc block/bio.c:1758 #1: ffff80008f6f29d0 (cpu_hotplug_lock){++++}-{0:0}, at: kmem_cache_destroy+0x48/0x178 mm/slab_common.c:510 #2: ffff80008f937898 (slab_mutex){+.+.}-{4:4}, at: kmem_cache_destroy+0x58/0x178 mm/slab_common.c:511 2 locks held by kworker/0:4/6582: 3 locks held by kworker/1:3/6589: 2 locks held by kworker/1:4/6603: 4 locks held by kworker/1:5/6610: 4 locks held by kworker/1:6/6635: 4 locks held by kworker/0:6/6641: 3 locks held by kworker/u8:11/7012: 3 locks held by kworker/u8:12/7014: 3 locks held by syz-executor/7087: 2 locks held by syz-executor/7381: 3 locks held by syz-executor/7507: 3 locks held by udevd/7534: 2 locks held by udevd/7647: 2 locks held by cmp/8124: #0: ffff0000d7cee428 (sb_writers#3){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2652 [inline] #0: ffff0000d7cee428 (sb_writers#3){.+.+}-{0:0}, at: filemap_read+0xd64/0xea8 mm/filemap.c:2783 #1: ffff0000d7cfc950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 4 locks held by kworker/u8:13/8128: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009cec7bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928b54e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000cd618768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6062 [inline] #3: ffff0000cd618768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000cd618768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 4 locks held by kworker/u8:14/8129: 3 locks held by kworker/u8:15/8130: 2 locks held by kworker/1:8/8131: 1 lock held by kworker/u8:16/8132: =============================================