INFO: task syz-executor.3:6671 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-next-20240426-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:23696 pid:6671 tgid:6664 ppid:6171 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:826 [inline]
do_unlinkat+0x26a/0x830 fs/namei.c:4394
__do_sys_unlink fs/namei.c:4455 [inline]
__se_sys_unlink fs/namei.c:4453 [inline]
__x64_sys_unlink+0x49/0x60 fs/namei.c:4453
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa67fc7dea9
RSP: 002b:00007fa6809eb0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fa67fdac120 RCX: 00007fa67fc7dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 00007fa67fcca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa67fdac120 R15: 00007ffc87c6bd58
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e338f78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff8e338f78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:939
1 lock held by khungtaskd/30:
#0: ffffffff8e333ba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e333ba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e333ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:6/1035:
#0: ffff8880b943e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
6 locks held by kworker/u8:9/2891:
#0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3197 [inline]
#0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3303
#1: ffffc9000b1b7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3198 [inline]
#1: ffffc9000b1b7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3303
#2: ffffffff8f5d11d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:591
#3: ffff88807c44e0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff88807c44e0e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff88807c44e0e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x13b/0x440 net/devlink/core.c:506
#4: ffff888061064250 (&devlink->lock_key#12){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline]
#4: ffff888061064250 (&devlink->lock_key#12){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff888061064250 (&devlink->lock_key#12){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x14d/0x440 net/devlink/core.c:506
#5: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x69/0x400 drivers/net/netdevsim/netdev.c:586
2 locks held by getty/4845:
#0: ffff88802ef6a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.3/6665:
2 locks held by syz-executor.3/6671:
#0: ffff888077252420 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805e420188 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
#1: ffff88805e420188 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4394
2 locks held by syz-executor.1/9114:
#0: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
#1: ffffffff8e338f78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#1: ffffffff8e338f78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.4/9210:
#0: ffffffff8f5d11d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c8/0x7b0 net/core/net_namespace.c:501
#1: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159
1 lock held by syz-executor.2/9221:
#0: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.3/9231:
#0: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f5dd948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.9.0-rc5-next-20240426-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 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 PID: 1035 Comm: kworker/u8:6 Not tainted 6.9.0-rc5-next-20240426-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: bat_events batadv_mcast_mla_update
RIP: 0010:batadv_mcast_mla_forw_flags_get net/batman-adv/multicast.c:253 [inline]
RIP: 0010:batadv_mcast_mla_flags_get net/batman-adv/multicast.c:290 [inline]
RIP: 0010:__batadv_mcast_mla_update net/batman-adv/multicast.c:910 [inline]
RIP: 0010:batadv_mcast_mla_update+0x707/0x4030 net/batman-adv/multicast.c:949
Code: ad b9 94 49 8d 5c 24 10 48 89 d8 48 c1 e8 03 0f b6 04 08 84 c0 0f 85 13 01 00 00 0f b6 1b bf 03 00 00 00 89 de e8 19 65 45 f6 <83> fb 03 75 62 49 8d 5c 24 78 48 89 d8 48 c1 e8 03 48 b9 00 00 00
RSP: 0018:ffffc90004c079c0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffff888022335a00 RSI: 0000000000000000 RDI: 0000000000000003
RBP: ffffc90004c07bb0 R08: ffffffff8b50f317 R09: 1ffffffff25f2cb0
R10: dffffc0000000000 R11: fffffbfff25f2cb1 R12: ffff88807d79c800
R13: ffff88802b89c118 R14: ffffffff94b9ad80 R15: ffff88805e98c000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000280 CR3: 0000000064ab6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
process_one_work kernel/workqueue.c:3222 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3303
worker_thread+0x86d/0xd70 kernel/workqueue.c:3384
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