INFO: task syz.3.4502:27320 blocked for more than 143 seconds. Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.4502 state:D stack:26464 pid:27320 tgid:27320 ppid:24752 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 coredump_task_exit kernel/exit.c:434 [inline] do_exit+0x3fe/0x2bb0 kernel/exit.c:834 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031 get_signal+0x2658/0x26d0 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3ac5f7def9 RSP: 002b:00007ffccb9432a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffdfc RBX: 00007ffccb9433d0 RCX: 00007f3ac5f7def9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3ac6136064 RBP: 00007f3ac6136064 R08: 00007f3ac6dbf080 R09: 00007ffccb94359f R10: 00007ffccb9433b0 R11: 0000000000000246 R12: 000000000017a0e2 R13: 00007ffccb9433b0 R14: 0000000000000032 R15: 000000000017a0b0 INFO: task syz.3.4502:27322 blocked for more than 143 seconds. Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.4502 state:D stack:28752 pid:27322 tgid:27320 ppid:24752 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264 coredump_wait fs/coredump.c:417 [inline] do_coredump+0x821/0x3da0 fs/coredump.c:574 get_signal+0x237c/0x26d0 kernel/signal.c:2902 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3ac5f7def9 RSP: 002b:00007f3ac6d9d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f3ac6136060 RCX: 00007f3ac5f7def9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3ac6136064 RBP: 00007f3ac6136058 R08: 00007f3ac6dbf080 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3ac6136064 R13: 0000000000000000 R14: 00007ffccb943060 R15: 00007ffccb943148 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8ddb9b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626 2 locks held by dhcpcd/4897: #0: ffffffff8fa814c8 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x4a2/0x6c0 net/socket.c:1309 #1: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0xcf/0xa80 net/8021q/vlan.c:553 2 locks held by getty/4986: #0: ffff88803062e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 1 lock held by syz.3.752/8794: 3 locks held by kworker/u8:26/12770: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x11f0/0x1ad0 kernel/workqueue.c:3206 #1: ffffc90010a87d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1ad0 kernel/workqueue.c:3207 #2: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276 2 locks held by kworker/u8:41/15115: #0: ffff88801db95148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x11f0/0x1ad0 kernel/workqueue.c:3206 #1: ffffc90008fb7d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1ad0 kernel/workqueue.c:3207 3 locks held by kworker/u8:3/25138: #0: ffff88802f906948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x11f0/0x1ad0 kernel/workqueue.c:3206 #1: ffffc900015f7d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1ad0 kernel/workqueue.c:3207 #2: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4736 5 locks held by kworker/u8:28/27235: #0: ffff88801bae5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x11f0/0x1ad0 kernel/workqueue.c:3206 #1: ffffc9000874fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1ad0 kernel/workqueue.c:3207 #2: ffffffff8fa96750 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580 #3: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x8f/0x9b0 net/core/dev.c:11930 #4: ffffffff8ddc52f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:296 2 locks held by syz.3.4502/27321: 2 locks held by syz.3.4754/28374: 1 lock held by syz-executor/28646: #0: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6643 7 locks held by syz-executor/28652: #0: ffff88802ef2a420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:736 #1: ffff888037df6c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325 #2: ffff88802842ad28 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326 #3: ffffffff8f0538e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216 #4: ffff88803885f0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #4: ffff88803885f0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline] #4: ffff88803885f0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292 #5: ffff888038859250 (&devlink->lock_key#55){+.+.}-{3:3}, at: nsim_drv_remove+0x4a/0x1d0 drivers/net/netdevsim/dev.c:1672 #6: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x6f/0x6b0 drivers/net/netdevsim/netdev.c:773 1 lock held by syz-executor/28748: #0: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8faac368 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6643 1 lock held by syz.3.4834/28790: #0: ffffffff8ddc52f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #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+0x116/0x1f0 lib/dump_stack.c:119 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf0c/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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: 28374 Comm: syz.3.4754 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:rcu_read_lock include/linux/rcupdate.h:839 [inline] RIP: 0010:mtree_load+0x117/0xa30 lib/maple_tree.c:6320 Code: 00 00 00 48 c7 c7 60 9b db 8d 48 8d 05 00 00 00 00 50 e8 bc 13 73 f6 e8 77 f8 12 00 31 ff 89 c3 89 c6 e8 ac dd 94 f6 85 db 58 <0f> 85 91 07 00 00 e8 5e db 94 f6 8b 9c 24 88 00 00 00 e8 52 db 94 RSP: 0018:ffffc900095a7ad0 EFLAGS: 00000202 RAX: ffffffff8af6493e RBX: 0000000000000001 RCX: ffffffff8af64954 RDX: ffff88802dab3c00 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffffc900095a7c70 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000010 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f86b43826c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001b31000 CR3: 000000007c4ba000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vma_lookup include/linux/mm.h:3503 [inline] do_pages_stat_array mm/migrate.c:2337 [inline] do_pages_stat+0x47c/0x8e0 mm/migrate.c:2408 kernel_move_pages+0xe26/0x1530 mm/migrate.c:2495 __do_sys_move_pages mm/migrate.c:2506 [inline] __se_sys_move_pages mm/migrate.c:2501 [inline] __x64_sys_move_pages+0xe0/0x1c0 mm/migrate.c:2501 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f86b357def9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f86b4382038 EFLAGS: 00000246 ORIG_RAX: 0000000000000117 RAX: ffffffffffffffda RBX: 00007f86b3735f80 RCX: 00007f86b357def9 RDX: 00000000000000ff RSI: 0002000000000003 RDI: 0000000000000001 RBP: 00007f86b35f0b76 R08: 0000000000000001 R09: 8000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f86b3735f80 R15: 00007ffe780ffd08