INFO: task syz.0.16:5444 blocked for more than 143 seconds. Not tainted 6.11.0-syzkaller-04557-g2f27fce67173 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack:22336 pid:5444 tgid:5404 ppid:5217 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write kernel/locking/rwsem.c:1315 [inline] down_write_nested+0x1e0/0x220 kernel/locking/rwsem.c:1696 vfs_rename+0x6a2/0xf00 fs/namei.c:4984 do_renameat2+0xd94/0x13f0 fs/namei.c:5170 __do_sys_rename fs/namei.c:5217 [inline] __se_sys_rename fs/namei.c:5215 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5215 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff01997def9 RSP: 002b:00007ff0193bd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007ff019b36130 RCX: 00007ff01997def9 RDX: 0000000000000000 RSI: 0000000020000f40 RDI: 00000000200003c0 RBP: 00007ff0199f0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff019b36130 R15: 00007ffe2b236a98 Showing all locks held in the system: 4 locks held by kworker/u8:0/11: #0: ffff888020abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888020abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90000107d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90000107d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562 #3: ffff888031a252a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2175 [inline] #3: ffff888031a252a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x5b0/0x7a0 fs/f2fs/segment.c:440 1 lock held by khungtaskd/30: #0: ffffffff8e738a60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e738a60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e738a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701 5 locks held by kworker/u8:2/35: #0: ffff88801b6e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88801b6e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90000ab7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90000ab7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8faa3990 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:580 #3: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: cleanup_net+0x6af/0xcc0 net/core/net_namespace.c:616 #4: ffffffff8e73de38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #4: ffffffff8e73de38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:965 3 locks held by kworker/u8:4/62: #0: ffff888020abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888020abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900015dfd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900015dfd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff8880253ce0e0 (&type->s_umount_key#100){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562 3 locks held by kworker/u8:7/1290: #0: ffff88802f8ba148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88802f8ba148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc9000471fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc9000471fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196 3 locks held by kworker/u8:8/1302: #0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc9000495fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc9000495fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 2 locks held by kworker/u8:9/2949: #0: ffff8880b883e718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560 #1: ffff8880b8828948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:989 2 locks held by dhcpcd/4886: #0: ffffffff8fa94fa8 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x661/0x8e0 net/socket.c:1309 #1: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0x112/0x9d0 net/8021q/vlan.c:553 2 locks held by getty/4976: #0: ffff8880303c10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/u9:2/5219: #0: ffff88807ae46948 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88807ae46948 ((wq_completion)hci0){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc9000356fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc9000356fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff888011ba8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327 3 locks held by kworker/1:3/5224: #0: ffff88801a880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88801a880948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900035afd00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900035afd00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 3 locks held by kworker/u9:5/5230: #0: ffff888031ae1148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888031ae1148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900035ffd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900035ffd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff88802ee8cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327 5 locks held by syz.0.16/5441: 3 locks held by syz.0.16/5444: #0: ffff8880634ae420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff8880587c0a10 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline] #1: ffff8880587c0a10 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3161 [inline] #1: ffff8880587c0a10 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: do_renameat2+0x62c/0x13f0 fs/namei.c:5105 #2: ffff8880587c12d8 (&sb->s_type->i_mutex_key#26/4){+.+.}-{3:3}, at: vfs_rename+0x6a2/0xf00 fs/namei.c:4984 2 locks held by syz.4.47/5807: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.47/5813: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.47/5815: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.47/5816: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.3.37/5958: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.3.37/6011: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 5 locks held by syz.1.92/6157: #0: ffff8880253ce420 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:63 #2: ffff88804c580a18 (&c->snapshot_create_lock){.+.+}-{3:3}, at: bch2_truncate+0x16c/0x2c0 fs/bcachefs/io_misc.c:290 #3: ffff88804c5842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline] #3: ffff88804c5842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline] #3: ffff88804c5842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3200 #4: ffff88804c5a6690 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1197 1 lock held by syz.1.92/6208: #0: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #0: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: do_lock_mount+0x112/0x3a0 fs/namespace.c:2607 1 lock held by syz.1.92/6209: #0: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #0: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 2 locks held by syz.1.92/6210: #0: ffff8880253ce420 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff8880775008a8 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 3 locks held by bch-reclaim/loo/6182: 2 locks held by syz.0.101/6184: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.0.101/6189: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.0.101/6193: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.0.101/6194: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.0.101/6202: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.1.306/6930: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.3.319/6990: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.3.319/6999: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.338/7093: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.338/7099: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.338/7100: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.338/7101: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 2 locks held by syz.4.338/7103: #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880634ae0e0 (&type->s_umount_key#74){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff88802587a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb40 fs/fs-writeback.c:2797 1 lock held by syz-executor/7091: #0: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643 2 locks held by syz-executor/7120: #0: ffffffff8faa3990 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fab0488 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:414 3 locks held by syz.0.345/7123: #0: ffff88807e360d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline] #0: ffff88807e360d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2698 #1: ffff88807e360078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5183 #2: ffffffff8fc1cc28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1972 [inline] #2: ffffffff8fc1cc28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2589 4 locks held by syz.1.346/7127: #0: ffff88804446cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline] #0: ffff88804446cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2698 #1: ffff88804446c078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5183 #2: ffffffff8fc1cc28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1972 [inline] #2: ffffffff8fc1cc28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2589 #3: ffffffff8e73de38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #3: ffffffff8e73de38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:965 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-04557-g2f27fce67173 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 617 Comm: kworker/u8:5 Not tainted 6.11.0-syzkaller-04557-g2f27fce67173 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:__unwind_start+0x44/0x740 arch/x86/kernel/unwind_orc.c:689 Code: 48 89 f3 49 89 fe 48 bd 00 00 00 00 00 fc ff df ba 60 00 00 00 31 f6 e8 1a ae b6 00 48 89 ea 4d 8d 6e 28 4d 89 ef 49 c1 ef 03 <41> 80 3c 2f 00 74 12 4c 89 ef e8 1d ac b6 00 48 ba 00 00 00 00 00 RSP: 0018:ffffc900036ff100 EFLAGS: 00000a02 RAX: ffffc900036ff160 RBX: ffff888025025a00 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffc900036ff1c0 RBP: dffffc0000000000 R08: ffffc900036ff1bf R09: 0000000000000000 R10: ffffc900036ff160 R11: fffff520006dfe38 R12: 0000000000000000 R13: ffffc900036ff188 R14: ffffc900036ff160 R15: 1ffff920006dfe31 FS: 0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055cd95a42ff0 CR3: 000000002ef8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4159 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4171 kmalloc_noprof include/linux/slab.h:694 [inline] kzalloc_noprof include/linux/slab.h:816 [inline] ieee802_11_parse_elems_full+0xdb/0x2880 net/mac80211/parse.c:958 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2383 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2390 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1575 [inline] ieee80211_ibss_rx_queued_mgmt+0x4c8/0x2d70 net/mac80211/ibss.c:1606 ieee80211_iface_process_skb net/mac80211/iface.c:1603 [inline] ieee80211_iface_work+0x8a5/0xf20 net/mac80211/iface.c:1657 cfg80211_wiphy_work+0x2db/0x490 net/wireless/core.c:440 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x870/0xd30 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244