INFO: task syz.4.10303:15742 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.10303     state:D stack:25304 pid:15742 tgid:15742 ppid:2962   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
 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+0x26de/0x3780 mm/hugetlb.c:6579
 handle_mm_fault+0x173f/0x1980 mm/memory.c:5831
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f2b78d3f46b
RSP: 002b:00007f2b7902fb98 EFLAGS: 00010202
RAX: 0000000020000940 RBX: 0000000000000004 RCX: 00000000aaaaaaaa
RDX: 0000000000000005 RSI: 00000000aaaaaaaa RDI: 0000000020000940
RBP: 00007f2b7902fc70 R08: 00007f2b78c00000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 0000000000000032
R13: 00007f2b7902fc90 R14: 00007f2b7902fcb0 R15: fffffffffffffffe
 </TASK>
INFO: task syz.4.10303:15743 blocked for more than 144 seconds.
      Not tainted 6.11.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.10303     state:D stack:22360 pid:15743 tgid:15742 ppid:2962   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
 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+0x1b10/0x3780 mm/hugetlb.c:6531
 handle_mm_fault+0x173f/0x1980 mm/memory.c:5831
 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:ffffc900098a7778 EFLAGS: 00050202
RAX: 0000000000800000 RBX: 0000000000000000 RCX: 0000000020000020
RDX: 0000000000000000 RSI: ffffffff8c0ae6c0 RDI: ffffffff8c606400
RBP: ffffc900098a7ec8 R08: ffffffff9017ce2f R09: 1ffffffff202f9c5
R10: dffffc0000000000 R11: fffffbfff202f9c6 R12: 1ffff92001314f7d
R13: 1ffff92001314f08 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: 0033:0x7f2b78d779f9
RSP: 002b:00007f2b79ae5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2b78f05f80 RCX: 00007f2b78d779f9
RDX: 0000000020000000 RSI: 00000000c028aa03 RDI: 0000000000000006
RBP: 00007f2b78de58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2b78f05f80 R15: 00007f2b7902fa38
 </TASK>
INFO: task syz.3.10314:16176 blocked for more than 144 seconds.
      Not tainted 6.11.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.10314     state:D stack:25632 pid:16176 tgid:16175 ppid:12530  flags:0x00000004
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
 mfill_atomic_hugetlb mm/userfaultfd.c:578 [inline]
 mfill_atomic mm/userfaultfd.c:769 [inline]
 mfill_atomic_poison+0x10a6/0x1780 mm/userfaultfd.c:896
 userfaultfd_poison fs/userfaultfd.c:1941 [inline]
 userfaultfd_ioctl+0x33bc/0x70a0 fs/userfaultfd.c:2148
 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: 0033:0x7fde86f779f9
RSP: 002b:00007fde87db9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fde87105f80 RCX: 00007fde86f779f9
RDX: 0000000020000080 RSI: 00000000c020aa08 RDI: 0000000000000004
RBP: 00007fde86fe58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fde87105f80 R15: 00007fde8722fa38
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
3 locks held by klogd/4673:
 #0: ffff8880b923ea18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:568
 #1: ffffffff8ea429a0 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:568
 #2: ffff8880485a2818 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
 #2: ffff8880485a2818 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051
2 locks held by getty/4987:
 #0: ffff88802b0170a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz.4.10303/15742:
 #0: ffff88804fd9d8e0 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:690 [inline]
 #0: ffff88804fd9d8e0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f9/0x6e0 mm/memory.c:5999
 #1: ffff88801ba8e578 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_wp+0x104d/0x3a90 mm/hugetlb.c:6027
3 locks held by syz.4.10303/15743:
 #0: ffff88804612a798 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline]
 #0: ffff88804612a798 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5870 [inline]
 #0: ffff88804612a798 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5930
 #1: ffff88801ba8e578 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: hugetlb_fault+0x575/0x3780 mm/hugetlb.c:6451
 #2: ffff88806e0854e8 (&resv_map->rw_sema){++++}-{3:3}, at: hugetlb_fault+0x67b/0x3780 mm/hugetlb.c:6458
3 locks held by syz.3.10314/16176:
 #0: ffff8880328a4c40 (&vma->vm_lock->lock){++++}-{3:3}, at: uffd_lock_vma+0x22d/0x2e0 mm/userfaultfd.c:95
 #1: ffff88802dd897f8 (&ctx->map_changing_lock){++++}-{3:3}, at: mfill_atomic mm/userfaultfd.c:744 [inline]
 #1: ffff88802dd897f8 (&ctx->map_changing_lock){++++}-{3:3}, at: mfill_atomic_poison+0x2af/0x1780 mm/userfaultfd.c:896
 #2: ffff88801ba8e578 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: mfill_atomic_hugetlb mm/userfaultfd.c:578 [inline]
 #2: ffff88801ba8e578 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: mfill_atomic mm/userfaultfd.c:769 [inline]
 #2: ffff88801ba8e578 (&hugetlb_fault_mutex_table[i]){+.+.}-{3:3}, at: mfill_atomic_poison+0x10a6/0x1780 mm/userfaultfd.c:896

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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+0xfee/0x1030 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 17529 Comm: kworker/u8:0 Not tainted 6.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:____napi_schedule+0x1/0x300 net/core/dev.c:4504
Code: e8 84 3d 65 fb e9 de fe ff ff e8 aa f9 30 02 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 41 55 41 54 53 49 89 f7 49 89 fe e8 cb 67 0e f8 48 c7
RSP: 0018:ffffc9000b31f480 EFLAGS: 00000082
RAX: 1ffffffff1c52949 RBX: 0000000000000000 RCX: ffff8880288b5a00
RDX: 0000000000000000 RSI: ffff8880b9340248 RDI: ffff8880b9340040
RBP: ffff8880b9340001 R08: ffffffff89872ca6 R09: 1ffff1101726804b
R10: dffffc0000000000 R11: ffffed101726804c R12: ffff88802ccfdb40
R13: 1ffff1100599fb6a R14: ffff8880b9340040 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69704d2ab8 CR3: 000000000e734000 CR4: 00000000003526f0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 enqueue_to_backlog+0x7b9/0xc80 net/core/dev.c:4878
 netif_rx_internal+0x17a/0x630 net/core/dev.c:5190
 __netif_rx+0x78/0xc0 net/core/dev.c:5210
 veth_forward_skb drivers/net/veth.c:322 [inline]
 veth_xmit+0x61d/0xae0 drivers/net/veth.c:375
 __netdev_start_xmit include/linux/netdevice.h:4913 [inline]
 netdev_start_xmit include/linux/netdevice.h:4922 [inline]
 xmit_one net/core/dev.c:3580 [inline]
 dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3596
 __dev_queue_xmit+0x1b63/0x3e90 net/core/dev.c:4423
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 batadv_send_skb_packet+0x40d/0x670 net/batman-adv/send.c:108
 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline]
 batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x673/0x810 net/batman-adv/bat_iv_ogm.c:1700
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 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>