INFO: task kworker/u10:2:11241 blocked for more than 430 seconds.
      Not tainted 6.16.0-rc7-syzkaller-g7b388bf7a9d9 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u10:2   state:D stack:0     pid:11241 tgid:11241 ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: ib-unreg-wq ib_unregister_work
Call Trace:
[<ffffffff86408686>] context_switch kernel/sched/core.c:5397 [inline]
[<ffffffff86408686>] __schedule+0x105c/0x4088 kernel/sched/core.c:6786
[<ffffffff8640b776>] __schedule_loop kernel/sched/core.c:6864 [inline]
[<ffffffff8640b776>] schedule+0xc4/0x35e kernel/sched/core.c:6879
[<ffffffff8641fdaa>] schedule_timeout+0x1c6/0x2b2 kernel/time/sleep_timeout.c:75
[<ffffffff8640d312>] do_wait_for_common+0x1c2/0x3d0 kernel/sched/completion.c:95
[<ffffffff8640d850>] __wait_for_common kernel/sched/completion.c:116 [inline]
[<ffffffff8640d850>] wait_for_common kernel/sched/completion.c:127 [inline]
[<ffffffff8640d850>] wait_for_completion+0x40/0x5c kernel/sched/completion.c:148
[<ffffffff8462e9cc>] disable_device+0x1b2/0x2ba drivers/infiniband/core/device.c:1288
[<ffffffff8462ed66>] __ib_unregister_device+0x292/0x406 drivers/infiniband/core/device.c:1518
[<ffffffff8462eefa>] ib_unregister_work+0x20/0x36 drivers/infiniband/core/device.c:1630
[<ffffffff801cc2a6>] process_one_work+0x85c/0x1f4a kernel/workqueue.c:3238
[<ffffffff801ce9dc>] process_scheduled_works kernel/workqueue.c:3321 [inline]
[<ffffffff801ce9dc>] worker_thread+0x5d0/0xdea kernel/workqueue.c:3402
[<ffffffff801e9036>] kthread+0x3a4/0x7e0 kernel/kthread.c:464
[<ffffffff8006b974>] ret_from_fork_kernel+0x2a/0xbec arch/riscv/kernel/process.c:228
[<ffffffff8642642e>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:362

Showing all locks held in the system:
1 lock held by khungtaskd/37:
 #0: ffffffff885dbd80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6766
1 lock held by syslogd/3000:
2 locks held by getty/3176:
 #0: ffffaf8018f3b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0x12ba drivers/tty/n_tty.c:2222
1 lock held by syz-executor/3202:
4 locks held by kworker/u9:0/9972:
2 locks held by kworker/0:2/10061:
3 locks held by kworker/u10:2/11241:
 #0: ffffaf8011fae948 ((wq_completion)ib-unreg-wq){+.+.}-{0:0}, at: process_one_work+0x72e/0x1f4a kernel/workqueue.c:3213
 #1: ffff8f8003df7b70 ((work_completion)(&device->unregistration_work)){+.+.}-{0:0}, at: process_one_work+0x756/0x1f4a kernel/workqueue.c:3213
 #2: ffffaf801b23c6d0 (&device->unregistration_lock){+.+.}-{4:4}, at: __ib_unregister_device+0x204/0x406 drivers/infiniband/core/device.c:1514
2 locks held by kworker/u10:3/11497:
4 locks held by kworker/u8:0/11619:
 #0: ffffaf8012ae2148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x72e/0x1f4a kernel/workqueue.c:3213
 #1: ffff8f8003617b70 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x756/0x1f4a kernel/workqueue.c:3213
 #2: ffffffff89a53430 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xd2/0x7ec net/core/net_namespace.c:662
 #3: ffffffff885ebe80 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x56/0x66c kernel/rcu/tree.c:3786
2 locks held by syz-executor/11706:
2 locks held by kworker/0:0/11753:
1 lock held by syz.0.3163/12258:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-g7b388bf7a9d9 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007b6f0>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff80003298>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff80062c2c>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80062c2c>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff80062cc0>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff863c038a>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff863c0650>] nmi_trigger_cpumask_backtrace+0x2c4/0x466 lib/nmi_backtrace.c:62
[<ffffffff80089546>] arch_trigger_cpumask_backtrace+0x2c/0x42 arch/riscv/kernel/smp.c:350
[<ffffffff804fa5a8>] trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
[<ffffffff804fa5a8>] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
[<ffffffff804fa5a8>] watchdog+0xd0e/0x11fe kernel/hung_task.c:470
[<ffffffff801e9036>] kthread+0x3a4/0x7e0 kernel/kthread.c:464
[<ffffffff8006b974>] ret_from_fork_kernel+0x2a/0xbec arch/riscv/kernel/process.c:228
[<ffffffff8642642e>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:362
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9972 Comm: kworker/u9:0 Not tainted 6.16.0-rc7-syzkaller-g7b388bf7a9d9 #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_unbound nsim_dev_trap_report_work
epc : kasan_quarantine_put+0x8a/0x1d6 mm/kasan/quarantine.c:236
 ra : kasan_quarantine_put+0x1a0/0x1d6 mm/kasan/quarantine.c:234
epc : ffffffff80b04fb0 ra : ffffffff80b050c6 sp : ffff8f8001f07730
 gp : ffffffff89e816e0 tp : ffffaf801b49b480 t0 : ffff8f8001f07710
 t1 : 000000000000000a t2 : 00000000108be1e5 s0 : ffff8f8001f07770
 s1 : 0000000000064f80 a0 : 0000000000000000 a1 : ffffffff87f7bcd0
 a2 : 0000000000000006 a3 : 0000000000000001 a4 : 0000000000000001
 a5 : 0000000000000000 a6 : 0000000000000098 a7 : fffffffffe95560e
 s2 : ffffaf803b3aa000 s3 : 0000000000000002 s4 : ffffaf8011802140
 s5 : 0000000000000000 s6 : 0000000000000000 s7 : 1ffff5f00621e092
 s8 : 1ffff5f0076755d8 s9 : ffffaf80310f0490 s10: 0000000000000000
 s11: 0000000000000000 t3 : 13e7e3bf00000000 t4 : fffffffef2226a54
 t5 : fffffffef2226a55 t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80b04fb0>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff80b04fb0>] kasan_quarantine_put+0x8a/0x1d6 mm/kasan/quarantine.c:234
[<ffffffff80b00f50>] __kasan_slab_free+0x56/0x68 mm/kasan/common.c:271
[<ffffffff80a5bcc6>] kasan_slab_free include/linux/kasan.h:233 [inline]
[<ffffffff80a5bcc6>] slab_free_hook mm/slub.c:2381 [inline]
[<ffffffff80a5bcc6>] slab_free mm/slub.c:4643 [inline]
[<ffffffff80a5bcc6>] kfree+0x252/0x4da mm/slub.c:4842
[<ffffffff8512eec4>] skb_kfree_head net/core/skbuff.c:1048 [inline]
[<ffffffff8512eec4>] skb_free_head+0x230/0x2ea net/core/skbuff.c:1060
[<ffffffff8513eb72>] skb_release_data+0x526/0x6d6 net/core/skbuff.c:1087
[<ffffffff8514bdb8>] skb_release_all net/core/skbuff.c:1152 [inline]
[<ffffffff8514bdb8>] __kfree_skb net/core/skbuff.c:1166 [inline]
[<ffffffff8514bdb8>] consume_skb net/core/skbuff.c:1398 [inline]
[<ffffffff8514bdb8>] consume_skb+0xca/0xfa net/core/skbuff.c:1392
[<ffffffff8372cd1e>] nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
[<ffffffff8372cd1e>] nsim_dev_trap_report_work+0x8b6/0xc96 drivers/net/netdevsim/dev.c:851
[<ffffffff801cc2a6>] process_one_work+0x85c/0x1f4a kernel/workqueue.c:3238
[<ffffffff801ce9dc>] process_scheduled_works kernel/workqueue.c:3321 [inline]
[<ffffffff801ce9dc>] worker_thread+0x5d0/0xdea kernel/workqueue.c:3402
[<ffffffff801e9036>] kthread+0x3a4/0x7e0 kernel/kthread.c:464
[<ffffffff8006b974>] ret_from_fork_kernel+0x2a/0xbec arch/riscv/kernel/process.c:228
[<ffffffff8642642e>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:362