INFO: task syz-executor:6465 blocked for more than 143 seconds. Not tainted 6.14.0-syzkaller-gd6b13dbd03b7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6465 tgid:6465 ppid:1 task_flags:0x400140 flags:0x0000000d Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5378 [inline] __schedule+0x1360/0x257c kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6857 schedule_timeout+0xb4/0x290 kernel/time/sleep_timeout.c:75 do_wait_for_common+0x30c/0x468 kernel/sched/completion.c:95 __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:148 __synchronize_srcu+0x2f8/0x3a0 kernel/rcu/srcutree.c:1433 synchronize_srcu_expedited+0x24/0x34 kernel/rcu/srcutree.c:1458 bch2_fs_btree_iter_exit+0x398/0x448 fs/bcachefs/btree_iter.c:3633 __bch2_fs_free fs/bcachefs/super.c:571 [inline] bch2_fs_release+0x20c/0x708 fs/bcachefs/super.c:624 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2a8/0x41c lib/kobject.c:737 bch2_fs_free+0x2c4/0x334 fs/bcachefs/super.c:686 bch2_kill_sb+0x48/0x58 fs/bcachefs/fs.c:2313 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1413 __cleanup_mnt+0x20/0x30 fs/namespace.c:1420 task_work_run+0x230/0x2e0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008ff32620 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 3 locks held by kworker/u8:2/44: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff800099667ba0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by dhcpcd/6136: #0: ffff0000cb3546c8 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: __netlink_dump_start+0xf8/0x720 net/netlink/af_netlink.c:2387 #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x8c/0x1d0 net/core/rtnetlink.c:6780 2 locks held by getty/6221: #0: ffff0000d7b820a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bf8b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:12/7331: #0: ffff0000d24fb148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff80009c5d7ba0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 4 locks held by kworker/u8:14/7333: #0: ffff0000c183a148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff80009c5f7ba0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800092e1a9d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x148/0xa48 net/core/net_namespace.c:606 #3: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz-executor/9283: #0: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by syz-executor/9607: #0: ffff800091cd4c40 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:163 #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline] #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xaf8/0x1844 net/core/rtnetlink.c:4021 2 locks held by syz-executor/9642: #0: ffff80008fd51ab0 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:163 #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline] #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xaf8/0x1844 net/core/rtnetlink.c:4021 1 lock held by syz.5.652/9721: #0: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz.5.652/9722: #0: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by syz.1.654/9730: #0: ffff80008fd701c0 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:163 #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline] #1: ffff800092e27168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xaf8/0x1844 net/core/rtnetlink.c:4021 =============================================