INFO: task syz-executor:5222 blocked for more than 143 seconds. Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:19984 pid:5222 tgid:5222 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578 __super_lock fs/super.c:56 [inline] __super_lock_excl fs/super.c:71 [inline] deactivate_super+0xb5/0xf0 fs/super.c:505 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:228 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3ac3b7f327 RSP: 002b:00007ffe6d750f08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3ac3b7f327 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe6d750fc0 RBP: 00007ffe6d750fc0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe6d752040 R13: 00007f3ac3bf0134 R14: 000000000001458b R15: 00007ffe6d752080 INFO: task syz.2.36:5609 blocked for more than 144 seconds. Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.36 state:D stack:24144 pid:5609 tgid:5608 ppid:5225 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 jfs_flush_journal+0x72c/0xec0 fs/jfs/jfs_logmgr.c:1564 jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:684 dquot_quota_sync+0xdc/0x4a0 fs/quota/dquot.c:754 iterate_supers+0xc6/0x190 fs/super.c:934 quota_sync_all fs/quota/quota.c:69 [inline] __do_sys_quotactl fs/quota/quota.c:938 [inline] __se_sys_quotactl+0x38e/0xa30 fs/quota/quota.c:917 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: 0033:0x7fe6c577dff9 RSP: 002b:00007fe6c6595038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007fe6c5935f80 RCX: 00007fe6c577dff9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100 RBP: 00007fe6c57f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe6c5935f80 R15: 00007ffdd0c79d78 INFO: task syz.0.50:5742 blocked for more than 144 seconds. Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.50 state:D stack:23512 pid:5742 tgid:5741 ppid:5218 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 __super_lock fs/super.c:58 [inline] super_lock+0x27c/0x400 fs/super.c:120 super_lock_shared fs/super.c:139 [inline] iterate_supers+0x8c/0x190 fs/super.c:931 quota_sync_all fs/quota/quota.c:69 [inline] __do_sys_quotactl fs/quota/quota.c:938 [inline] __se_sys_quotactl+0x38e/0xa30 fs/quota/quota.c:917 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: 0033:0x7f6cbb77dff9 RSP: 002b:00007f6cbc5fe038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007f6cbb935f80 RCX: 00007f6cbb77dff9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100 RBP: 00007f6cbb7f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6cbb935f80 R15: 00007fff36538758 Showing all locks held in the system: 3 locks held by kworker/u8:1/12: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90000117d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000117d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 1 lock held by khungtaskd/30: #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 3 locks held by kworker/u8:8/2912: #0: ffff88814bbb5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88814bbb5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90009427d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90009427d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196 2 locks held by dhcpcd/4889: #0: ffff888060e876c8 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x119/0x790 net/netlink/af_netlink.c:2404 #1: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x99/0x200 net/core/rtnetlink.c:6505 2 locks held by getty/4975: #0: ffff88814bd540a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/5222: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 1 lock held by syz.2.36/5609: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.50/5742: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.2.77/6043: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.85/6109: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.132/6531: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.137/6557: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.268/7044: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.283/7142: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 2 locks held by syz-executor/7615: #0: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643 #1: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: ffffffff8e93d378 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976 1 lock held by syz.1.353/7618: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.383/7759: #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880623880e0 (&type->s_umount_key#95){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor/7763: #0: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcbf248 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 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: 16 Comm: ksoftirqd/0 Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:node_maxindex lib/radix-tree.c:218 [inline] RIP: 0010:radix_tree_load_root lib/radix-tree.c:397 [inline] RIP: 0010:__radix_tree_lookup lib/radix-tree.c:758 [inline] RIP: 0010:radix_tree_lookup+0x7e/0x290 lib/radix-tree.c:819 Code: 00 48 89 de e8 33 29 e0 f5 48 83 fb 02 0f 85 f1 01 00 00 48 89 2c 24 4c 89 e3 48 83 e3 fd 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 75 01 00 00 44 0f b6 2b bf 40 00 00 00 44 89 ee e8 19 RSP: 0018:ffffc90000157000 EFLAGS: 00000806 RAX: 0000000000000000 RBX: ffff888023400000 RCX: ffff88801cebda00 RDX: 0000000000000100 RSI: 0000000000000002 RDI: 0000000000000002 RBP: ffffffff8e7e2308 R08: ffffffff8bb4b70d R09: 1ffff11008fc50cc R10: dffffc0000000000 R11: ffffed1008fc50cd R12: ffff888023400002 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000008 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4abbf07ab8 CR3: 000000000e734000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __queue_work+0x553/0xf50 kernel/workqueue.c:2281 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2390 __ieee80211_queue_skb_to_iface net/mac80211/rx.c:233 [inline] ieee80211_queue_skb_to_iface net/mac80211/rx.c:244 [inline] ieee80211_rx_h_mgmt+0x50f/0x710 net/mac80211/rx.c:4050 ieee80211_rx_handlers+0x67fc/0xb830 net/mac80211/rx.c:4208 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4238 [inline] ieee80211_prepare_and_rx_handle+0x31ab/0x6360 net/mac80211/rx.c:5086 __ieee80211_rx_handle_packet net/mac80211/rx.c:5327 [inline] ieee80211_rx_list+0x2ce0/0x3780 net/mac80211/rx.c:5462 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5485 ieee80211_rx include/net/mac80211.h:5138 [inline] ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:439 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:784 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:927 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 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