INFO: task syz-executor:6495 blocked for more than 144 seconds. Not tainted 6.15.0-rc6-syzkaller-gc919f08732cc #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6495 tgid:6495 ppid:6486 task_flags:0x400140 flags:0x00000010 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:735 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 wb_wait_for_completion+0x150/0x280 fs/fs-writeback.c:216 __writeback_inodes_sb_nr+0x1b0/0x218 fs/fs-writeback.c:2747 writeback_inodes_sb_nr fs/fs-writeback.c:2764 [inline] writeback_inodes_sb+0x78/0x8c fs/fs-writeback.c:2779 sync_filesystem+0xa0/0x218 fs/sync.c:54 generic_shutdown_super+0x70/0x2b8 fs/super.c:621 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1431 __cleanup_mnt+0x20/0x30 fs/namespace.c:1438 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 kworker/R-kvfre/6: #0: ffff80008f3b10e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 2 locks held by kworker/0:0/9: 2 locks held by kworker/0:1/11: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 1 lock held by kworker/R-mm_pe/14: #0: ffff80008f3b10e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by khungtaskd/32: #0: ffff80008f508aa0 (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: ffff80008f3b10e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f3b10e8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529 3 locks held by kworker/u8:2/43: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800097d47bc0 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248b628 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:3/45: 1 lock held by pr/ttyAMA0/46: 3 locks held by kworker/u8:4/132: 3 locks held by kworker/u8:5/330: 3 locks held by kworker/u8:6/519: 3 locks held by kworker/u8:7/530: 4 locks held by kworker/1:2/1802: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009fae7bc0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248b628 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d5fd0768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000d5fd0768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc4/0x1c0 net/wireless/reg.c:3209 3 locks held by kworker/u8:8/2144: 3 locks held by kworker/u8:9/2177: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a0b77bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248b628 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:10/2209: 3 locks held by kworker/0:2/2302: 3 locks held by kworker/R-ipv6_/4142: #0: ffff0000d2179948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009f8c7ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248b628 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 5 locks held by kworker/R-bat_e/4223: 1 lock held by udevd/6106: 2 locks held by dhcpcd/6160: 2 locks held by crond/6235: 2 locks held by getty/6260: #0: ffff0000cce290a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 2 locks held by kworker/1:3/6481: 4 locks held by syz-executor/6493: 1 lock held by syz-executor/6495: #0: ffff0000cfdf80e0 (&type->s_umount_key#56){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000cfdf80e0 (&type->s_umount_key#56){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000cfdf80e0 (&type->s_umount_key#56){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 1 lock held by kworker/R-wg-cr/6511: #0: ffff80008f3b10e8 (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/6512: #0: ffff80008f3b10e8 (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/6513: #0: ffff80008f3b10e8 (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/6521: #0: ffff80008f3b10e8 (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/6522: 2 locks held by kworker/1:4/6537: 2 locks held by kworker/1:5/6538: 2 locks held by kworker/0:3/6540: 4 locks held by kworker/1:8/6558: #0: ffff0000c8d31148 ((wq_completion)wg-kex-wg0#5){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a2667bc0 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000d9b8d308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x130/0x748 drivers/net/wireguard/noise.c:598 #3: ffff0000f06e8338 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x414/0x748 drivers/net/wireguard/noise.c:632 3 locks held by kworker/0:4/6620: 4 locks held by kworker/u8:11/6745: 3 locks held by kworker/u8:12/6785: 2 locks held by syz.0.102/7007: 3 locks held by kworker/u8:13/7056: 2 locks held by kworker/u8:14/7057: 4 locks held by kworker/u8:15/7058: 3 locks held by syz-executor/7059: 1 lock held by kworker/u8:16/7061: =============================================