INFO: task syz.0.105:6471 blocked for more than 143 seconds.
      Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.105       state:D stack:28344 pid:6471  tgid:6465  ppid:5839   task_flags:0x400140 flags:0x00024004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
 rwsem_down_read_slowpath+0x62f/0xb60 kernel/locking/rwsem.c:1084
 __down_read_common kernel/locking/rwsem.c:1248 [inline]
 __down_read kernel/locking/rwsem.c:1261 [inline]
 down_read+0xef/0x480 kernel/locking/rwsem.c:1526
 i_mmap_lock_read include/linux/fs.h:565 [inline]
 __rmap_walk_file+0x50c/0x620 mm/rmap.c:2884
 rmap_walk_file+0x174/0x1f0 mm/rmap.c:2930
 rmap_walk+0x7a/0xd0 mm/rmap.c:2941
 remove_migration_ptes+0x11d/0x1b0 mm/migrate.c:365
 unmap_and_move_huge_page mm/migrate.c:1516 [inline]
 migrate_hugetlbs mm/migrate.c:1638 [inline]
 migrate_pages+0x9f3/0x2350 mm/migrate.c:2068
 do_mbind+0x6f0/0xf30 mm/mempolicy.c:1425
 kernel_mbind+0x1e3/0x1f0 mm/mempolicy.c:1568
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb36318e969
RSP: 002b:00007fb364001038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007fb3633b6080 RCX: 00007fb36318e969
RDX: 0000000100000000 RSI: 0000000100000004 RDI: 0000000000002000
RBP: 00007fb363210ab1 R08: 0000000000000005 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb3633b6080 R15: 00007fff68fd8d68
 </TASK>
INFO: task syz.0.105:6480 blocked for more than 144 seconds.
      Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.105       state:D stack:28552 pid:6480  tgid:6465  ppid:5839   task_flags:0x400040 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 io_schedule+0xbf/0x130 kernel/sched/core.c:7742
 folio_wait_bit_common+0x3d6/0x9e0 mm/filemap.c:1317
 __folio_lock mm/filemap.c:1664 [inline]
 folio_lock include/linux/pagemap.h:1137 [inline]
 folio_lock include/linux/pagemap.h:1133 [inline]
 __filemap_get_folio+0x77c/0xc10 mm/filemap.c:1917
 filemap_lock_folio include/linux/pagemap.h:775 [inline]
 filemap_lock_hugetlb_folio include/linux/hugetlb.h:806 [inline]
 hugetlbfs_zero_partial_page+0xaf/0x520 fs/hugetlbfs/inode.c:658
 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:699 [inline]
 hugetlbfs_fallocate+0xf81/0x12e0 fs/hugetlbfs/inode.c:745
 vfs_fallocate+0x608/0x10b0 fs/open.c:338
 madvise_remove mm/madvise.c:1034 [inline]
 madvise_vma_behavior+0x1a75/0x1d50 mm/madvise.c:1263
 madvise_walk_vmas+0x1ce/0x2c0 mm/madvise.c:1530
 madvise_do_behavior+0x12b/0x3b0 mm/madvise.c:1695
 do_madvise mm/madvise.c:1782 [inline]
 do_madvise+0x10b/0x170 mm/madvise.c:1773
 __do_sys_madvise mm/madvise.c:1790 [inline]
 __se_sys_madvise mm/madvise.c:1788 [inline]
 __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1788
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb36318e969
RSP: 002b:00007fb363fe0038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fb3633b6160 RCX: 00007fb36318e969
RDX: 0000000000000009 RSI: ffffffffffff0001 RDI: 0000000000002000
RBP: 00007fb363210ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb3633b6160 R15: 00007fff68fd8d68
 </TASK>

Showing all locks held in the system:
2 locks held by pool_workqueue_/3:
1 lock held by khungtaskd/31:
 #0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6764
5 locks held by kworker/u8:2/36:
 #0: ffff88801c2f6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc90000ad7d18 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffffffff90116c50 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xc9/0xb30 net/core/net_namespace.c:608
 #3: ffffffff9012cae8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x8b/0xaf0 net/core/dev.c:12524
 #4: ffffffff8e3ca978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x280/0x3c0 kernel/rcu/tree_exp.h:304
2 locks held by kworker/u8:3/53:
 #0: ffff888140f2c148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc90000be7d18 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
2 locks held by kworker/u8:7/3469:
 #0: ffff8880b8539f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:605
 #1: ffff8880b8523c48 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987
2 locks held by getty/5595:
 #0: ffff888036bf20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900033462f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
1 lock held by syz.0.105/6471:
 #0: ffff888021e83bc8 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_read include/linux/fs.h:565 [inline]
 #0: ffff888021e83bc8 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: __rmap_walk_file+0x50c/0x620 mm/rmap.c:2884
3 locks held by syz.0.105/6480:
 #0: ffff888022ebc420 (sb_writers#12){.+.+}-{0:0}, at: madvise_remove mm/madvise.c:1034 [inline]
 #0: ffff888022ebc420 (sb_writers#12){.+.+}-{0:0}, at: madvise_vma_behavior+0x1a75/0x1d50 mm/madvise.c:1263
 #1: ffff888021e838f8 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #1: ffff888021e838f8 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:687 [inline]
 #1: ffff888021e838f8 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: hugetlbfs_fallocate+0xce6/0x12e0 fs/hugetlbfs/inode.c:745
 #2: ffff888021e83bc8 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_write include/linux/fs.h:545 [inline]
 #2: ffff888021e83bc8 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:695 [inline]
 #2: ffff888021e83bc8 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_fallocate+0xd5d/0x12e0 fs/hugetlbfs/inode.c:745
3 locks held by kworker/u8:8/6506:
 #0: ffff8880b8539f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:605
 #1: ffff8880b8523c48 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffffffff9012cae8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #2: ffffffff9012cae8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4735
7 locks held by syz.4.473/8350:
2 locks held by syz.1.474/8359:
 #0: ffffffff8f779628 (mon_lock){+.+.}-{4:4}, at: mon_text_release+0x4e/0x3d0 drivers/usb/mon/mon_text.c:650
 #1: ffffffff8e3ca840 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x48/0x6e0 kernel/rcu/tree.c:3774

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
 watchdog+0xf70/0x12c0 kernel/hung_task.c:437
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8359 Comm: syz.1.474 Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:valid_section include/linux/mmzone.h:1992 [inline]
RIP: 0010:pfn_valid include/linux/mmzone.h:2118 [inline]
RIP: 0010:page_table_check_clear+0x130/0xb30 mm/page_table_check.c:70
Code: 00 31 f6 48 c7 c7 80 f3 3b 8e e8 8b 0b 6d ff e8 b6 68 44 09 31 ff 41 89 c4 89 c6 e8 7a 07 90 ff 5a 45 85 e4 0f 85 95 07 00 00 <e8> 2b 0c 90 ff 48 85 ed 0f 84 0f 04 00 00 e8 1d 0c 90 ff 48 89 ea
RSP: 0018:ffffc9000c3ff548 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 000000000007562c RCX: ffffffff822aa56b
RDX: ffff88802b3dbc00 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff88813fffa5c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: ffff88823ffef400 R15: 00000000000001ec
FS:  0000000000000000(0000) GS:ffff888124abf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30b6fff8 CR3: 0000000034310000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __page_table_check_pte_clear+0xf1/0x100 mm/page_table_check.c:154
 page_table_check_pte_clear include/linux/page_table_check.h:49 [inline]
 ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1337 [inline]
 get_and_clear_full_ptes include/linux/pgtable.h:714 [inline]
 zap_present_folio_ptes mm/memory.c:1501 [inline]
 zap_present_ptes mm/memory.c:1586 [inline]
 do_zap_pte_range mm/memory.c:1687 [inline]
 zap_pte_range mm/memory.c:1731 [inline]
 zap_pmd_range mm/memory.c:1823 [inline]
 zap_pud_range mm/memory.c:1852 [inline]
 zap_p4d_range mm/memory.c:1873 [inline]
 unmap_page_range+0x2383/0x4390 mm/memory.c:1894
 unmap_single_vma+0x194/0x2a0 mm/memory.c:1940
 unmap_vmas+0x22c/0x490 mm/memory.c:1984
 exit_mmap+0x1b9/0xb90 mm/mmap.c:1284
 __mmput+0x12a/0x410 kernel/fork.c:1379
 mmput+0x62/0x70 kernel/fork.c:1401
 exit_mm kernel/exit.c:589 [inline]
 do_exit+0x9d1/0x2c30 kernel/exit.c:940
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
 get_signal+0x2673/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7a0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x230 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f909d98e969
Code: Unable to access opcode bytes at 0x7f909d98e93f.
RSP: 002b:00007f909e827038 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: fffffffffffffffc RBX: 00007f909dbb6160 RCX: 00007f909d98e969
RDX: 0000000000000059 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f909da10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f909dbb6160 R15: 00007ffc986188d8
 </TASK>