INFO: task syz.0.3780:31790 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.3780      state:D stack:26160 pid:31790 tgid:31790 ppid:31320  flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 io_schedule+0x8d/0x110 kernel/sched/core.c:7401
 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1307
 __filemap_get_folio+0xb7/0xc10 mm/filemap.c:1898
 hugetlb_fault+0x1b72/0x3770 mm/hugetlb.c:6531
 handle_mm_fault+0x1901/0x1bc0 mm/memory.c:5830
 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f31a514597c
RSP: 002b:00007f31a545fb88 EFLAGS: 00010246
RAX: 0000000020000d00 RBX: 0000000000000004 RCX: 8000000000000010
RDX: 0000000000000010 RSI: 00007f31a4c005d5 RDI: 0000000020000d00
RBP: 00007f31a5337a80 R08: 00007f31a5000000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00000000002f897f
R13: 00007f31a545fc90 R14: 0000000000000032 R15: fffffffffffffffe
 </TASK>
INFO: task syz.0.3780:31791 blocked for more than 144 seconds.
      Not tainted 6.11.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.3780      state:D stack:23960 pid:31791 tgid:31790 ppid:31320  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 hugetlb_wp+0x104d/0x3a90 mm/hugetlb.c:6027
 hugetlb_fault+0x27b2/0x3770 mm/hugetlb.c:6579
 handle_mm_fault+0x1901/0x1bc0 mm/memory.c:5830
 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 <f3> a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc90003b5fad0 EFLAGS: 00050246
RAX: ffffffff84b29f01 RBX: 0000000020021040 RCX: 0000000000000040
RDX: 0000000000000000 RSI: ffffc90003b5fb60 RDI: 0000000020021000
RBP: ffffc90003b5fc10 R08: ffffc90003b5fb9f R09: 1ffff9200076bf73
R10: dffffc0000000000 R11: fffff5200076bf74 R12: 0000000000000040
R13: 00000000000209c0 R14: 0000000020021000 R15: ffffc90003b5fb60
 copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
 _inline_copy_to_user include/linux/uaccess.h:181 [inline]
 _copy_to_user+0x86/0xb0 lib/usercopy.c:26
 copy_to_user include/linux/uaccess.h:209 [inline]
 rng_dev_read+0x3be/0x6d0 drivers/char/hw_random/core.c:251
 do_loop_readv_writev fs/read_write.c:761 [inline]
 vfs_readv+0x6c2/0xa90 fs/read_write.c:934
 do_preadv fs/read_write.c:1049 [inline]
 __do_sys_preadv fs/read_write.c:1099 [inline]
 __se_sys_preadv fs/read_write.c:1094 [inline]
 __x64_sys_preadv+0x1c7/0x2d0 fs/read_write.c:1094
 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: 0033:0x7f31a517def9
RSP: 002b:00007f31a5eaa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007f31a5335f80 RCX: 00007f31a517def9
RDX: 0000000000000002 RSI: 0000000020000580 RDI: 0000000000000005
RBP: 00007f31a51f09f6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f31a5335f80 R15: 00007f31a545fa28
 </TASK>
INFO: task syz.0.3780:31792 blocked for more than 145 seconds.
      Not tainted 6.11.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.3780      state:D stack:23864 pid:31792 tgid:31790 ppid:31320  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 hugetlb_fault+0x56f/0x3770 mm/hugetlb.c:6451
 handle_mm_fault+0x1901/0x1bc0 mm/memory.c:5830
 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__put_user_8+0x11/0x20 arch/x86/lib/putuser.S:107
Code: 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 cc cc cc cc 66 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003b3f778 EFLAGS: 00050202
RAX: 0000000000800000 RBX: 0000000000000000 RCX: 0000000020000020
RDX: 0000000000000000 RSI: ffffffff8c0ae6c0 RDI: ffffffff8c608e80
RBP: ffffc90003b3fec8 R08: ffffffff9018772f R09: 1ffffffff2030ee5
R10: dffffc0000000000 R11: fffffbfff2030ee6 R12: 1ffff92000767f7d
R13: 1ffff92000767f08 R14: 0000000020800000 R15: 0000000000800000
 userfaultfd_copy fs/userfaultfd.c:1735 [inline]
 userfaultfd_ioctl+0x28e7/0x70a0 fs/userfaultfd.c:2133
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 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: 0033:0x7f31a517def9
RSP: 002b:00007f31a4bff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f31a5336058 RCX: 00007f31a517def9
RDX: 0000000020000000 RSI: 00000000c028aa03 RDI: 0000000000000009
RBP: 00007f31a51f09f6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f31a5336058 R15: 00007f31a545fa28
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by kworker/u8:2/35:
3 locks held by kworker/u8:3/52:
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc90000bc7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc90000bc7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
5 locks held by kworker/u8:7/2483:
 #0: ffff88801bae5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff88801bae5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc900090c7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc900090c7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffffffff8fc7f890 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594
 #3: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe9/0xa90 net/core/dev.c:11883
 #4: ffffffff8e93d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
 #4: ffffffff8e93d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958
2 locks held by dhcpcd/4900:
 #0: ffff888034458678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x119/0x790 net/netlink/af_netlink.c:2404
 #1: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #1: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x99/0x200 net/core/rtnetlink.c:6506
2 locks held by getty/4982:
 #0: ffff8880303260a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz.4.768/10148:
1 lock held by syz.1.1683/15682:
3 locks held by syz.0.3780/31790:
 #0: ffff888075fc5718 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:153
 #1: ffff8880212a84e8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_fault+0x56f/0x3770 mm/hugetlb.c:6451
 #2: ffff8880127cf4e8 (&resv_map->rw_sema){++++}-{3:3}, at: hugetlb_fault+0x675/0x3770 mm/hugetlb.c:6458
2 locks held by syz.0.3780/31791:
 #0: ffff888075fc5718 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:153
 #1: ffff8880212a84e8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_wp+0x104d/0x3a90 mm/hugetlb.c:6027
2 locks held by syz.0.3780/31792:
 #0: ffff888075fc5718 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline]
 #0: ffff888075fc5718 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5869 [inline]
 #0: ffff888075fc5718 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5929
 #1: ffff8880212a84e8 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_fault+0x56f/0x3770 mm/hugetlb.c:6451
1 lock held by syz-executor/32071:
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3510
1 lock held by syz-executor/32721:
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
1 lock held by syz.2.3966/314:
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x48f/0x2400 drivers/net/tun.c:3120
1 lock held by syz.2.3966/322:
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x48f/0x2400 drivers/net/tun.c:3120
2 locks held by syz.3.3967/320:
 #0: ffff888058e7c258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
 #0: ffff888058e7c258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_setsockopt+0x754/0x1970 net/packet/af_packet.c:3885
 #1: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: prb_calc_retire_blk_tmo net/packet/af_packet.c:633 [inline]
 #1: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: init_prb_bdqc net/packet/af_packet.c:691 [inline]
 #1: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: packet_set_ring+0xb7d/0x2450 net/packet/af_packet.c:4546
1 lock held by syz.1.3970/335:
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fc8c448 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 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:223 [inline]
 watchdog+0xff4/0x1040 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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111