INFO: task kworker/u4:16:5119 blocked for more than 143 seconds. Not tainted 6.1.102-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:16 state:D stack:0 pid:5119 ppid:2 flags:0x00000008 Workqueue: writeback wb_workfn (flush-7:3) Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xef4/0x1d44 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 rwsem_down_write_slowpath+0xc80/0x156c kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write+0x84/0x88 kernel/locking/rwsem.c:1574 f2fs_down_write fs/f2fs/f2fs.h:2176 [inline] f2fs_balance_fs+0x40c/0x60c fs/f2fs/segment.c:428 f2fs_write_inode+0x42c/0x4a0 fs/f2fs/inode.c:736 write_inode fs/fs-writeback.c:1460 [inline] __writeback_single_inode+0x614/0x1770 fs/fs-writeback.c:1677 writeback_sb_inodes+0x978/0x1718 fs/fs-writeback.c:1903 __writeback_inodes_wb+0x110/0x39c fs/fs-writeback.c:1974 wb_writeback+0x428/0x1130 fs/fs-writeback.c:2079 wb_check_background_flush fs/fs-writeback.c:2145 [inline] wb_do_writeback fs/fs-writeback.c:2233 [inline] wb_workfn+0xc98/0x1034 fs/fs-writeback.c:2260 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015b95070 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by rcu_tasks_trace/13: #0: ffff800015b95870 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by khungtaskd/28: #0: ffff800015b94ea0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4052: #0: ffff0000d5fea098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001be902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2198 4 locks held by kworker/u4:13/4790: #0: ffff0000ce5db938 ((wq_completion)phy11){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001e487c20 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff0000f27fcd40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1114 [inline] #2: ffff0000f27fcd40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0xa0/0x1230 net/mac80211/ibss.c:1680 #3: ffff0000dd7b17a0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1256 [inline] #3: ffff0000dd7b17a0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_sta_merge_ibss net/mac80211/ibss.c:1299 [inline] #3: ffff0000dd7b17a0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x494/0x1230 net/mac80211/ibss.c:1708 4 locks held by kworker/u4:14/4836: #0: ffff0000c0845138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001e457c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff800017fd77d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf4/0x994 net/core/net_namespace.c:566 #3: ffff0000edf753e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x11c/0x2dc drivers/net/wireguard/device.c:249 4 locks held by kworker/u4:16/5119: #0: ffff0000c2e4d938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff80001e6b7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff0000cb05e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:415 #3: ffff0000c3605140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2176 [inline] #3: ffff0000c3605140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x40c/0x60c fs/f2fs/segment.c:428 6 locks held by syz.3.330/5369: 5 locks held by syz-executor/7268: #0: ffff0000d7f46460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x244/0x91c fs/read_write.c:580 #1: ffff0000f1f3dc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:321 #2: ffff0000cc352da0 (kn->active#45){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:322 #3: ffff8000173a5e28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:209 #4: ffff0000db5910e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline] #4: ffff0000db5910e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1080 [inline] #4: ffff0000db5910e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xbc/0x724 drivers/base/dd.c:1283 4 locks held by syz-executor/7271: #0: ffff0000d7f46460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x244/0x91c fs/read_write.c:580 #1: ffff0000f196a888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:321 #2: ffff0000cc352da0 (kn->active#45){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:322 #3: ffff8000173a5e28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:209 4 locks held by syz-executor/7272: #0: ffff0000d7f46460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x244/0x91c fs/read_write.c:580 #1: ffff0000e8467c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:321 #2: ffff0000cc352da0 (kn->active#45){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:322 #3: ffff8000173a5e28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:209 3 locks held by syz-executor/7273: 4 locks held by syz-executor/7281: #0: ffff0000d7f46460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x244/0x91c fs/read_write.c:580 #1: ffff0000f1788088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:321 #2: ffff0000cc352da0 (kn->active#45){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:322 #3: ffff8000173a5e28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:209 1 lock held by dhcpcd/7386: #0: ffff000108052130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff000108052130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7434: #0: ffff0000f2f1e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000f2f1e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7437: #0: ffff0000de68c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000de68c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7438: #0: ffff0000d7f8a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000d7f8a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7439: #0: ffff0000d7f8c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000d7f8c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7440: #0: ffff0000dadfc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000dadfc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7441: #0: ffff0000ee858130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000ee858130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7442: #0: ffff0000cb910130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000cb910130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7443: #0: ffff0000c3de2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000c3de2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7444: #0: ffff0000d2616130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000d2616130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7445: #0: ffff0000de2a0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000de2a0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7446: #0: ffff0000d9924130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000d9924130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7447: #0: ffff0000d9926130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000d9926130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7448: #0: ffff0000d48e6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000d48e6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7449: #0: ffff0000de370130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000de370130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7450: #0: ffff0001068a2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0001068a2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7563: #0: ffff0000e4de8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000e4de8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7564: #0: ffff0000e5df4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000e5df4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7565: #0: ffff0000e4dea130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000e4dea130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7566: #0: ffff0000e4dec130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000e4dec130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 1 lock held by dhcpcd/7567: #0: ffff0000ec4e0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline] #0: ffff0000ec4e0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x4c/0xb58 net/packet/af_packet.c:3197 =============================================