INFO: task syz.4.227:4965 blocked for more than 143 seconds. Not tainted 5.15.164-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.227 state:D stack: 0 pid: 4965 ppid: 4028 flags:0x00000001 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5030 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6376 schedule+0x11c/0x1c8 kernel/sched/core.c:6459 rwsem_down_write_slowpath+0xd94/0x17e0 kernel/locking/rwsem.c:1165 __down_write_common kernel/locking/rwsem.c:1292 [inline] __down_write kernel/locking/rwsem.c:1301 [inline] down_write+0xe8/0x12c kernel/locking/rwsem.c:1552 inode_lock include/linux/fs.h:789 [inline] do_truncate+0x1ac/0x28c fs/open.c:63 handle_truncate fs/namei.c:3265 [inline] do_open fs/namei.c:3612 [inline] path_openat+0x20c4/0x26cc fs/namei.c:3742 do_filp_open+0x1a8/0x3b4 fs/namei.c:3769 do_sys_openat2+0x128/0x3e0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800014c91660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 4 locks held by kworker/u4:4/539: #0: ffff0000c0db4938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff80001d8f7c00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 #2: ffff0000f41080e0 (&type->s_umount_key#71){++++}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:418 #3: ffff0000e3e79108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x3e8/0x6a0 fs/f2fs/segment.c:528 2 locks held by getty/3782: #0: ffff0000d38ab098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff800019fb62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158 1 lock held by udevd/4044: 4 locks held by kworker/u4:7/4218: #0: ffff0000c0db4938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283 #1: ffff80001d577c00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285 #2: ffff0000c899e0e0 (&type->s_umount_key#71){++++}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:418 #3: ffff0000d2bd5108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x3e8/0x6a0 fs/f2fs/segment.c:528 2 locks held by kworker/u4:9/4269: 5 locks held by syz.4.227/4931: 2 locks held by syz.4.227/4965: #0: ffff0000f4108460 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ddf29450 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff0000ddf29450 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63 2 locks held by syz.0.583/5820: #0: ffff0000c899e460 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ddf9ba50 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff0000ddf9ba50 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63 5 locks held by syz.0.583/5877: 2 locks held by syz.3.1016/6892: #0: ffff0000f41080e0 (&type->s_umount_key#71){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:703 #1: ffff0000cbf927d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cbf927d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768 2 locks held by syz.2.1177/7309: #0: ffff0000f41080e0 (&type->s_umount_key#71){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:703 #1: ffff0000cbf927d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cbf927d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768 2 locks held by syz.1.1243/7513: #0: ffff0000f41080e0 (&type->s_umount_key#71){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:703 #1: ffff0000cbf927d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline] #1: ffff0000cbf927d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768 6 locks held by syz.0.1422/7947: #0: ffff800016c50350 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:802 #1: ffff800016bf4268 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 #2: ffff0000daec0628 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5314 [inline] #2: ffff0000daec0628 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_pre_doit+0x174/0x494 net/wireless/nl80211.c:15007 #3: ffff0000f5b88d40 (&wdev->mtx){+.+.}-{3:3}, at: wdev_lock net/wireless/core.h:220 [inline] #3: ffff0000f5b88d40 (&wdev->mtx){+.+.}-{3:3}, at: cfg80211_leave_ibss+0x54/0x88 net/wireless/ibss.c:230 #4: ffff0000daec17d0 (&local->sta_mtx){+.+.}-{3:3}, at: __sta_info_flush+0x168/0x46c net/mac80211/sta_info.c:1209 #5: ffff800014c95c68 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #5: ffff800014c95c68 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x320/0x660 kernel/rcu/tree_exp.h:845 2 locks held by syz.0.1422/7948: #0: ffff800016c50350 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:802 #1: ffff800016bf4268 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 =============================================