INFO: task syz.5.3371:17258 blocked for more than 143 seconds.
      Not tainted 6.14.0-rc1-syzkaller-00026-gd009de7d5428 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.3371      state:D stack:22704 pid:17258 tgid:17255 ppid:7474   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 disable_device+0x1c7/0x360 drivers/infiniband/core/device.c:1279
 __ib_unregister_device+0x2ac/0x3d0 drivers/infiniband/core/device.c:1502
 ib_unregister_device_and_put+0xb9/0xf0 drivers/infiniband/core/device.c:1567
 nldev_dellink+0x2c6/0x310 drivers/infiniband/core/nldev.c:1825
 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
 rdma_nl_rcv+0x6dd/0x9e0 drivers/infiniband/core/netlink.c:259
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:728
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2568
 ___sys_sendmsg net/socket.c:2622 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2654
 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: 0033:0x7fa342d8cda9
RSP: 002b:00007fa343ca5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa342fa6080 RCX: 00007fa342d8cda9
RDX: 0000000000000840 RSI: 00000000200002c0 RDI: 0000000000000003
RBP: 00007fa342e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa342fa6080 R15: 00007ffcc2a5a058
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e9387e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by getty/5588:
 #0: ffff888035d620a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by kworker/u8:8/6289:
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317
 #1: ffffc9000fc27c60 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
 #1: ffffc9000fc27c60 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317
4 locks held by kworker/u8:27/6699:
 #0: ffff88801baf3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
 #0: ffff88801baf3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317
 #1: ffffc9000457fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
 #1: ffffc9000457fc60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317
 #2: ffffffff8fca1990 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17a/0xd60 net/core/net_namespace.c:606
 #3: ffff88805e6b86c0 (&device->unregistration_lock){+.+.}-{4:4}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1650
2 locks held by syz.5.3371/17258:
 #0: ffffffff9a7887f8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline]
 #0: ffffffff9a7887f8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
 #0: ffffffff9a7887f8 (&rdma_nl_types[idx].sem){.+.+}-{4:4}, at: rdma_nl_rcv+0x32d/0x9e0 drivers/infiniband/core/netlink.c:259
 #1: ffff88805e6b86c0 (&device->unregistration_lock){+.+.}-{4:4}, at: __ib_unregister_device+0x264/0x3d0 drivers/infiniband/core/device.c:1498
4 locks held by dhcpcd-run-hook/18787:
 #0: ffff8880b863e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
 #1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
 #2: ffff88805fe143d8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #2: ffff88805fe143d8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: handle_pte_fault mm/memory.c:5897 [inline]
 #2: ffff88805fe143d8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: __handle_mm_fault+0x1541/0x70f0 mm/memory.c:6032
 #3: ffff8880b863e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc1-syzkaller-00026-gd009de7d5428 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __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:236 [inline]
 watchdog+0x1058/0x10a0 kernel/hung_task.c:399
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 18803 Comm: sed Not tainted 6.14.0-rc1-syzkaller-00026-gd009de7d5428 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:124 [inline]
RIP: 0010:lock_release+0x1af/0xa30 kernel/locking/lockdep.c:5868
Code: c7 84 24 b0 00 00 00 00 00 00 00 9c 8f 84 24 b0 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 99 8d 88 00 48 8b 9c 24 b0 00 00 00 <fa> 48 c7 c7 20 b4 0a 8c e8 64 26 53 0a 65 ff 05 0d a9 67 7e 48 8d
RSP: 0000:ffffc900149f7360 EFLAGS: 00000246
RAX: ffffffff93e33710 RBX: 0000000000000246 RCX: ffffffff819ae060
RDX: 0000000000000000 RSI: ffffffff8c5fb5e0 RDI: ffffffff8c5fb5a0
RBP: ffffc900149f7498 R08: ffffffff901a2777 R09: 1ffffffff20344ee
R10: dffffc0000000000 R11: fffffbfff20344ef R12: 1ffff9200293ee78
R13: ffffffff822efd67 R14: ffffc900149f7410 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb92d4e5380 CR3: 0000000064e92000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 rcu_lock_release include/linux/rcupdate.h:347 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 page_ext_put+0xa3/0xc0 mm/page_ext.c:550
 page_table_check_alloc include/linux/page_table_check.h:33 [inline]
 post_alloc_hook+0x207/0x240 mm/page_alloc.c:1552
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 folio_alloc_mpol_noprof mm/mempolicy.c:2289 [inline]
 vma_alloc_folio_noprof+0x12b/0x260 mm/mempolicy.c:2324
 folio_prealloc+0x2e/0x170
 alloc_anon_folio mm/memory.c:4822 [inline]
 do_anonymous_page mm/memory.c:4879 [inline]
 do_pte_missing mm/memory.c:4045 [inline]
 handle_pte_fault mm/memory.c:5889 [inline]
 __handle_mm_fault+0x3e4b/0x70f0 mm/memory.c:6032
 handle_mm_fault+0x2c1/0x7e0 mm/memory.c:6201
 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fb92d7fd0b8
Code: 48 89 c5 31 c0 48 85 ed 74 49 31 d2 48 8d 44 1d ff b9 70 02 00 00 48 f7 f3 48 0f af c3 4d 8d 84 05 40 f6 ff ff 31 c0 4c 89 c7 <f3> ab 49 89 a8 c0 09 00 00 4c 89 c7 e8 33 fa ff ff 48 85 c0 75 13
RSP: 002b:00007ffeb2032b10 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000040 RCX: 0000000000000270
RDX: 000000000000001f RSI: 0000000000000008 RDI: 00007fb92d4e5380
RBP: 00007fb92d4e4b60 R08: 00007fb92d4e5380 R09: 0000000000000000
R10: 0000000000000000 R11: 00007fb92d4e4740 R12: 0000000000000041
R13: 00000000000011c0 R14: 0000000000000000 R15: 00007fb92d81e2a0
 </TASK>