INFO: task syz-executor.2:2748 blocked for more than 143 seconds.
      Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:28144 pid:2748  ppid:3660   flags:0x00024000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5178 [inline]
 __schedule+0xadf/0x5270 kernel/sched/core.c:6490
 schedule+0xda/0x1b0 kernel/sched/core.c:6566
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106
 io_wq_exit_workers io_uring/io-wq.c:1253 [inline]
 io_wq_put_and_exit+0x243/0xe20 io_uring/io-wq.c:1288
 io_uring_clean_tctx+0x113/0x174 io_uring/tctx.c:199
 io_uring_cancel_generic+0x5aa/0x602 io_uring/io_uring.c:3027
 io_uring_files_cancel include/linux/io_uring.h:51 [inline]
 do_exit+0x533/0x2a20 kernel/exit.c:768
 do_group_exit+0xd0/0x2a0 kernel/exit.c:943
 get_signal+0x21a1/0x2430 kernel/signal.c:2858
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f28ac68b5a9
RSP: 002b:00007f28ad819168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000005eca RBX: 00007f28ac7ac050 RCX: 00007f28ac68b5a9
RDX: 00000000fffffffe RSI: 0000000000005eca RDI: 000000000000000b
RBP: 00007f28ac6e6580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f28accdfb1f R14: 00007f28ad819300 R15: 0000000000022000
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xbf9/0xf30 kernel/hung_task.c:377
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5753 Comm: syz-executor.3 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:strnlen+0x47/0x70 lib/string.c:504
Code: 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 11 <80> 38 00 75 d9 4c 29 e0 48 83 c4 08 5b 5d 41 5c c3 48 89 c7 48 89
RSP: 0018:ffffc90006767208 EFLAGS: 00000246
RAX: ffff888037efa5c8 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffff888037efa5c8
RBP: ffff888037efa5d8 R08: ffffffff8f53a058 R09: ffffffff8f53a04f
R10: ffffffff8f53a057 R11: 0000000000000001 R12: ffff888037efa5c8
R13: ffff888037efa5c8 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc733465700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002180 CR3: 000000007b151000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 strnlen include/linux/fortify-string.h:161 [inline]
 strscpy include/linux/fortify-string.h:241 [inline]
 __set_page_owner_handle+0x2eb/0x3b0 mm/page_owner.c:174
 __set_page_owner+0x3e/0x50 mm/page_owner.c:193
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549
 __folio_alloc+0x12/0x40 mm/page_alloc.c:5580
 vma_alloc_folio+0xf9/0x780 mm/mempolicy.c:2231
 shmem_alloc_folio+0x117/0x1e0 mm/shmem.c:1557
 shmem_alloc_and_acct_folio+0x15e/0x5d0 mm/shmem.c:1587
 shmem_getpage_gfp+0x6fe/0x1f30 mm/shmem.c:1921
 shmem_fault+0x1b4/0x750 mm/shmem.c:2128
 __do_fault+0x10d/0x610 mm/memory.c:4173
 do_read_fault mm/memory.c:4524 [inline]
 do_fault mm/memory.c:4653 [inline]
 handle_pte_fault mm/memory.c:4917 [inline]
 __handle_mm_fault+0x2130/0x39b0 mm/memory.c:5059
 handle_mm_fault+0x1c8/0x780 mm/memory.c:5157
 faultin_page mm/gup.c:990 [inline]
 __get_user_pages+0x4f3/0xfd0 mm/gup.c:1219
 populate_vma_page_range+0x23d/0x320 mm/gup.c:1576
 __mm_populate+0x1ea/0x3d0 mm/gup.c:1689
 mm_populate include/linux/mm.h:2663 [inline]
 vm_mmap_pgoff+0x1fd/0x270 mm/util.c:557
 ksys_mmap_pgoff+0x79/0x5a0 mm/mmap.c:1586
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc73228b5a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc733465168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fc7323ac050 RCX: 00007fc73228b5a9
RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007fc7322e6580 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc7328dfb1f R14: 00007fc733465300 R15: 0000000000022000
 </TASK>