INFO: task syz-executor:6515 blocked for more than 143 seconds. Not tainted 6.16.0-rc1-syzkaller-g39dfc971e42d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6515 tgid:6515 ppid:6510 task_flags:0x400140 flags:0x00000018 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 wb_wait_for_completion+0x150/0x280 fs/fs-writeback.c:216 sync_inodes_sb+0x184/0x870 fs/fs-writeback.c:2833 sync_filesystem+0x160/0x218 fs/sync.c:64 generic_shutdown_super+0x70/0x2b8 fs/super.c:622 kill_block_super+0x44/0x90 fs/super.c:1753 kill_f2fs_super+0x2b8/0x584 fs/f2fs/super.c:5082 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+0x16c/0x1ec 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+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by kthreadd/2: 1 lock held by kworker/R-kvfre/6: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 2 locks held by kworker/0:0/9: 2 locks held by kworker/0:1/11: 3 locks held by kworker/u8:0/12: 1 lock held by kworker/R-mm_pe/13: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 3 locks held by kworker/u8:1/15: 1 lock held by khungtaskd/32: #0: ffff80008f819e40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 1 lock held by kworker/R-write/34: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 3 locks held by kworker/u8:2/41: 3 locks held by kworker/u8:3/42: 3 locks held by kworker/u8:4/43: 3 locks held by pr/ttyAMA0/44: 3 locks held by kworker/u8:5/177: 2 locks held by kworker/u8:6/257: 3 locks held by kworker/u8:7/286: 3 locks held by kworker/u8:8/307: 3 locks held by kworker/u8:9/340: 3 locks held by kworker/u8:10/400: 3 locks held by kworker/R-ipv6_/4164: #0: ffff0000cc2be148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a0057ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/R-bat_e/4245: 1 lock held by klogd/6121: 1 lock held by dhcpcd/6186: 1 lock held by dhcpcd/6187: 2 locks held by getty/6277: #0: ffff0000d2d0d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b9be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 3 locks held by syz-executor/6505: 3 locks held by udevd/6507: 2 locks held by syz-executor/6515: #0: ffff0000d21f80e0 (&type->s_umount_key#59){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d21f80e0 (&type->s_umount_key#59){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d21f80e0 (&type->s_umount_key#59){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff0000ca31c7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:387 [inline] #1: ffff0000ca31c7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x16c/0x870 fs/fs-writeback.c:2831 4 locks held by syz-executor/6516: 1 lock held by syz-executor/6517: 3 locks held by syz-executor/6518: 2 locks held by kworker/0:2/6523: 1 lock held by kworker/R-wg-cr/6547: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 1 lock held by kworker/R-wg-cr/6549: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 1 lock held by kworker/R-wg-cr/6559: 1 lock held by kworker/R-wg-cr/6560: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 1 lock held by kworker/R-wg-cr/6561: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/6563: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/6564: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 3 locks held by kworker/0:3/6567: 1 lock held by kworker/1:6/6589: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 2 locks held by kworker/1:7/6596: 2 locks held by kworker/0:4/6619: 2 locks held by udevd/6656: 3 locks held by udevd/6755: 2 locks held by udevd/8908: 3 locks held by syz-executor/9339: 1 lock held by kworker/R-wg-cr/9420: #0: ffff80008f6c17a8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 4 locks held by kworker/u8:11/10982: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009f867bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff800092872028 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d5848768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6062 [inline] #3: ffff0000d5848768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000d5848768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 4 locks held by kworker/u8:12/10983: 2 locks held by kworker/u8:13/10984: 4 locks held by kworker/u8:14/10985: 2 locks held by kworker/0:6/10986: =============================================