INFO: task syz-executor:18324 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:24560 pid:18324 tgid:18324 ppid:1 task_flags:0x400140 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x125e/0x6990 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7474
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7531
rwsem_down_write_slowpath+0x4c6/0x12f0 kernel/locking/rwsem.c:1215
__down_write_common kernel/locking/rwsem.c:1347 [inline]
__down_write kernel/locking/rwsem.c:1356 [inline]
down_write+0x1bb/0x1f0 kernel/locking/rwsem.c:1632
rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
ops_exit_list net/core/net_namespace.c:200 [inline]
ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:253
setup_net+0x1fa/0x3a0 net/core/net_namespace.c:459
copy_net_ns+0x340/0x7a0 net/core/net_namespace.c:582
create_new_namespaces+0x3ea/0xac0 kernel/nsproxy.c:132
unshare_nsproxy_namespaces+0xf6/0x210 kernel/nsproxy.c:234
ksys_unshare+0x44f/0x980 kernel/fork.c:3293
__do_sys_unshare kernel/fork.c:3359 [inline]
__se_sys_unshare kernel/fork.c:3357 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:3357
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0cf37a0827
RSP: 002b:00007fff4a33a178 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f0cf3a25f40 RCX: 00007f0cf37a0827
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007f0cf3a267b8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000008
R13: 0000000000000003 R14: 00007fff4a33a3b8 R15: 0000000000000000
Showing all locks held in the system:
locks held by kworker/0:1/10: 3, last CPU#0:
#0: ffff88801d05dd40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1461/0x1b10 kernel/workqueue.c:3371
#1: ffffc900000f7d08 ((work_completion)(&(&gc_work->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#2: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#2: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: gc_worker+0x21a/0x1a10 net/netfilter/nf_conntrack_core.c:1532
locks held by pr/ttyS0/31: 2, last CPU#1:
#0: ffffffff8fdd75d8 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:314 [inline]
#0: ffffffff8fdd75d8 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:493 [inline]
#0: ffffffff8fdd75d8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x49/0x60 kernel/printk/printk.c:291
#1: ffffffff9cc9be58 (&port_lock_key){-.-.}-{3:3}, at: __uart_port_lock_irqsave include/linux/serial_core.h:613 [inline]
#1: ffffffff9cc9be58 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x64/0xc0 drivers/tty/serial/8250/8250_core.c:413
locks held by khungtaskd/32: 1, last CPU#0:
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6871
locks held by kworker/u8:5/96: 2, on CPU#1:
#0: ffff88801d09c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1461/0x1b10 kernel/workqueue.c:3371
#1: ffffc90002517d08 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
locks held by kworker/u8:6/152: 3, last CPU#0:
#0: ffff88801d09c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1461/0x1b10 kernel/workqueue.c:3371
#1: ffffc90002da7d08 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff888079d0d258 (&devlink->lock_key#7){+.+.}-{4:4}, at: nsim_dev_trap_report_work+0x56/0xd20 drivers/net/netdevsim/dev.c:834
locks held by syslogd/4941: 1, last CPU#0:
#0: ffff88807dba3078 (&u->iolock){+.+.}-{4:4}, at: __unix_dgram_recvmsg+0x298/0xd40 net/unix/af_unix.c:2591
locks held by klogd/4948: 1, last CPU#0:
#0: ffff888034bfb440 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0xc5/0x140 mm/memory.c:7482
locks held by syz-executor/5577: 2, last CPU#0:
#0: ffff88803174e540 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff88803174e540 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x124/0xa00 mm/mmap.c:1299
#1: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
locks held by kworker/u8:12/5883: 3, last CPU#0:
#0: ffff88801d09c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1461/0x1b10 kernel/workqueue.c:3371
#1: ffffc9000580fd08 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff88802be16258 (&devlink->lock_key#5){+.+.}-{4:4}, at: nsim_dev_trap_report_work+0x56/0xd20 drivers/net/netdevsim/dev.c:834
locks held by kworker/u8:13/6027: 4, last CPU#0:
#0: ffff88803519e140 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work+0x1461/0x1b10 kernel/workqueue.c:3371
#1: ffffc90006f8fd08 ((work_completion)(&(&forw_packet_aggr->delayed_work)->work)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff88802d4409c8 (&hard_iface->bat_iv.ogm_buff_mutex){+.+.}-{4:4}, at: batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1010 [inline]
#2: ffff88802d4409c8 (&hard_iface->bat_iv.ogm_buff_mutex){+.+.}-{4:4}, at: batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1005 [inline]
#2: ffff88802d4409c8 (&hard_iface->bat_iv.ogm_buff_mutex){+.+.}-{4:4}, at: batadv_iv_send_outstanding_bat_ogm_packet+0x50f/0x7d0 net/batman-adv/bat_iv_ogm.c:1924
#3: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:870 [inline]
#3: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: batadv_iv_ogm_schedule_buff+0x583/0x15d0 net/batman-adv/bat_iv_ogm.c:949
locks held by kworker/u8:15/6495: 3, last CPU#0:
#0: ffff88801d09c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1461/0x1b10 kernel/workqueue.c:3371
#1: ffffc9000abbfd08 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff88802c792258 (&devlink->lock_key#2){+.+.}-{4:4}, at: nsim_dev_trap_report_work+0x56/0xd20 drivers/net/netdevsim/dev.c:834
locks held by kworker/u8:17/8055: 4, on CPU#1:
#0: ffff88801e2e0940 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1461/0x1b10 kernel/workqueue.c:3371
#1: ffffc9000365fd08 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xb8/0x920 net/core/net_namespace.c:677
#3: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
locks held by getty/15549: 2, on CPU#0:
#0: ffff888038eb90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000fa892e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x1540 drivers/tty/n_tty.c:2211
locks held by syz-executor/18314: 2, on CPU#1:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffff888035441020 (&device->compat_devs_mutex){+.+.}-{4:4}, at: remove_one_compat_dev drivers/infiniband/core/device.c:1031 [inline]
#1: ffff888035441020 (&device->compat_devs_mutex){+.+.}-{4:4}, at: rdma_dev_exit_net+0x2d2/0x6b0 drivers/infiniband/core/device.c:1173
locks held by syz-executor/18324: 2, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
locks held by syz-executor/18356: 2, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
locks held by syz-executor/18435: 2, on CPU#1:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
locks held by syz-executor/18448: 2, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
locks held by syz-executor/18492: 2, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
locks held by syz.5.3340/18620: 1, last CPU#0:
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xbd/0x2090 arch/x86/kernel/unwind_orc.c:495
locks held by syz-executor/18656: 4, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
#3: ffff888035441020 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x112/0x820 drivers/infiniband/core/device.c:976
locks held by syz-executor/18675: 4, last CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
#3: ffff888035441020 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x112/0x820 drivers/infiniband/core/device.c:976
locks held by syz-executor/18683: 2, last CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff91cdd140 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock_killable include/linux/rtnetlink.h:149 [inline]
#1: ffffffff91cdd140 (rtnl_mutex){+.+.}-{4:4}, at: register_netdev+0x18/0x50 net/core/dev.c:11663
locks held by syz-executor/18696: 2, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_exit_net+0x174/0x6b0 drivers/infiniband/core/device.c:1156
locks held by syz-executor/18724: 4, on CPU#1:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
#3: ffff888035441020 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x112/0x820 drivers/infiniband/core/device.c:976
locks held by syz-executor/18748: 3, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by syz-executor/18762: 3, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by syz-executor/18775: 3, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by syz-executor/18786: 3, on CPU#1:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by syz-executor/18818: 3, on CPU#1:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by syz-executor/18843: 3, on CPU#1:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by syz-executor/18861: 3, on CPU#0:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by syz-executor/18872: 3, on CPU#1:
#0: ffffffff91cc45e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x31e/0x7a0 net/core/net_namespace.c:578
#1: ffffffff918e8f48 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x287/0x580 drivers/infiniband/core/device.c:1221
#2: ffffffff918e8cc8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x2fa/0x580 drivers/infiniband/core/device.c:1226
locks held by modprobe/18912: 2, last CPU#0:
#0: ffff88801d08e540 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:544 [inline]
#0: ffff88801d08e540 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x22c/0xa00 mm/mmap.c:1323
#1: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
#1: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xbd/0x2090 arch/x86/kernel/unwind_orc.c:495
locks held by syz-executor/18913: 1, last CPU#0:
#0: ffffffff909121b8 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline]
#0: ffffffff909121b8 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:320 [inline]
#0: ffffffff909121b8 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline]
#0: ffffffff909121b8 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_check_open_permission+0x169/0x3c0 security/tomoyo/file.c:772
locks held by sed/18916: 1, last CPU#0:
#0: ffff88807d130340 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:544 [inline]
#0: ffff88807d130340 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x22c/0xa00 mm/mmap.c:1323
locks held by udevd/18917: 1, last CPU#0:
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8fdeb360 (rcu_read_lock){....}-{1:3}, at: __d_lookup+0x73/0x4a0 fs/dcache.c:2698
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:123
nmi_trigger_cpumask_backtrace+0x21f/0x2a0 lib/nmi_backtrace.c:66
trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xcb1/0x1030 kernel/hung_task.c:561
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: pr/ttyS0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:io_serial_in+0x87/0xb0 drivers/tty/serial/8250/8250_port.c:410
Code: 38 57 fc 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1a 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 cc cc cc cc e8 d8 89 cb fc eb a2 e8 61 8a
RSP: 0018:ffffc90000a77950 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff85b54f00 RDI: ffffffff9cc9be80
RBP: ffffffff9cc9be40 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 205d323354202020 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff3993825 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888122a2a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffef2e3ef80 CR3: 00000000a8be6000 CR4: 00000000003526f0
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:128 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:150 [inline]
wait_for_lsr+0x13a/0x210 drivers/tty/serial/8250/8250_port.c:2013
serial8250_fifo_wait_for_lsr_thre+0x5f/0xd0 drivers/tty/serial/8250/8250_port.c:3270
__serial8250_console_fifo_write+0xa5/0x290 drivers/tty/serial/8250/8250_port.c:3345
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3378 [inline]
__serial8250_console_write drivers/tty/serial/8250/8250_port.c:3432 [inline]
serial8250_console_write+0x1108/0x14f0 drivers/tty/serial/8250/8250_port.c:3496
nbcon_emit_next_record+0x8f7/0xa70 kernel/printk/nbcon.c:1070
nbcon_emit_one+0x1a8/0x2b0 kernel/printk/nbcon.c:1157
nbcon_kthread_func+0x5ef/0x7f0 kernel/printk/nbcon.c:1271
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245