INFO: task syz.3.720:13567 blocked for more than 143 seconds. Not tainted 6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.720 state:D stack:23096 pid:13567 tgid:13531 ppid:13068 flags:0x00004006 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 xfs_ail_push_all_sync+0x236/0x310 fs/xfs/xfs_trans_ail.c:721 xfs_log_quiesce+0xdf/0x5b0 fs/xfs/xfs_log.c:1018 xfs_fs_freeze+0x8d/0x1a0 fs/xfs/xfs_super.c:936 freeze_super+0x81b/0xee0 fs/super.c:2107 fs_bdev_freeze+0x1ac/0x320 fs/super.c:1484 bdev_freeze+0xd6/0x220 block/bdev.c:256 xfs_fs_goingdown+0xa9/0x160 fs/xfs/xfs_fsops.c:446 xfs_file_ioctl+0x12d7/0x19e0 fs/xfs/xfs_ioctl.c:1462 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 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: 0033:0x7f7d9cf799b9 RSP: 002b:00007f7d9de23038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7d9d116058 RCX: 00007f7d9cf799b9 RDX: 0000000020000080 RSI: 000000008004587d RDI: 0000000000000006 RBP: 00007f7d9cfe78d8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7d9d116058 R15: 00007fffe4f87f98 Showing all locks held in the system: 6 locks held by kworker/u8:0/11: #0: ffff8880162e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff8880162e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fa63750 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1662 #4: ffff88805f020768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:6014 [inline] #4: ffff88805f020768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_netdev_notifier_call+0x1a8/0x1490 net/wireless/core.c:1499 #5: ffffffff8e73d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline] #5: ffffffff8e73d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958 3 locks held by kworker/u8:1/12: #0: ffff888015489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90000117d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90000117d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 1 lock held by khungtaskd/30: #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626 3 locks held by kworker/u8:3/52: #0: ffff88802a3dd948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88802a3dd948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90000bc7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90000bc7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4194 1 lock held by klogd/4659: #0: ffff8880b933e9d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560 1 lock held by dhcpcd/4884: #0: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1101 2 locks held by getty/4969: #0: ffff88802ae770a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211 5 locks held by syz.3.720/13567: #0: ffff88801d89d230 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: bdev_freeze+0x2a/0x220 block/bdev.c:247 #1: ffff888023c6e420 (sb_writers#12){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline] #1: ffff888023c6e420 (sb_writers#12){++++}-{0:0}, at: freeze_super+0x4e9/0xee0 fs/super.c:2085 #2: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #2: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #2: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: freeze_super+0x4f1/0xee0 fs/super.c:2086 #3: ffff888023c6e518 (sb_pagefaults#2){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline] #3: ffff888023c6e518 (sb_pagefaults#2){++++}-{0:0}, at: freeze_super+0x519/0xee0 fs/super.c:2090 #4: ffff888023c6e610 (sb_internal#2){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline] #4: ffff888023c6e610 (sb_internal#2){++++}-{0:0}, at: freeze_super+0x7cc/0xee0 fs/super.c:2104 1 lock held by syz.0.753/13897: #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.848/14699: #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.878/14912: #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.909/15250: #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.2.960/15701: #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.965/15732: #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.966/15743: #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff888023c6e0e0 (&type->s_umount_key#50){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120 1 lock held by syz-executor/15847: #0: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 1 lock held by syz-executor/15852: #0: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 2 locks held by syz-executor/15869: #0: ffffffff8fa63750 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1158 2 locks held by syz-executor/15872: #0: ffffffff8fa63750 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8fa702c8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:414 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 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+0xfee/0x1030 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1838 Comm: kworker/u8:7 Not tainted 6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:389 [inline] RIP: 0010:__rcu_read_lock+0x1d/0xb0 kernel/rcu/tree_plugin.h:412 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 4c 8b 3c 25 00 d7 03 00 <49> 81 c7 44 04 00 00 4c 89 fb 48 c1 eb 03 42 0f b6 04 33 84 c0 75 RSP: 0018:ffffc90004a6fb30 EFLAGS: 00000286 RAX: 1ffff1100b63fe38 RBX: ffff88805b1ff1c0 RCX: ffff888024bf3c00 RDX: 0000000000000000 RSI: ffffffff8beae6e0 RDI: ffffffff8c3f9540 RBP: ffff888057b9caf0 R08: ffffffff8ff6a6af R09: 1ffffffff1fed4d5 R10: dffffc0000000000 R11: fffffbfff1fed4d6 R12: ffff88802e6a8cc0 R13: 000000000000015e R14: dffffc0000000000 R15: ffff888024bf3c00 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555c0f6486d8 CR3: 000000000e534000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:836 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0xc4/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 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