INFO: task syz-executor.0:5385 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc5-syzkaller-00192-g10a6e5feccb8-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:20488 pid:5385  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x196c/0x4af0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 io_schedule+0x8c/0x100 kernel/sched/core.c:9026
 folio_wait_bit_common+0x881/0x12a0 mm/filemap.c:1301
 folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3068
 shrink_folio_list+0x529b/0x8870 mm/vmscan.c:1853
 shrink_inactive_list mm/vmscan.c:2614 [inline]
 shrink_list mm/vmscan.c:2855 [inline]
 shrink_lruvec+0x16e6/0x2d30 mm/vmscan.c:6319
 shrink_node_memcgs mm/vmscan.c:6505 [inline]
 shrink_node+0x1176/0x28c0 mm/vmscan.c:6540
 shrink_zones mm/vmscan.c:6779 [inline]
 do_try_to_free_pages+0x717/0x19e0 mm/vmscan.c:6841
 try_to_free_mem_cgroup_pages+0x455/0xa50 mm/vmscan.c:7156
 try_charge_memcg+0x6d9/0x18a0 mm/memcontrol.c:2691
 try_charge mm/memcontrol.c:2833 [inline]
 charge_memcg+0x11a/0x3f0 mm/memcontrol.c:6996
 mem_cgroup_swapin_charge_folio+0x25d/0x380 mm/memcontrol.c:7052
 __read_swap_cache_async+0x4fb/0xdf0 mm/swap_state.c:488
 swap_cluster_readahead+0x3b5/0x780 mm/swap_state.c:650
 swapin_readahead+0x118/0xbd0 mm/swap_state.c:858
 do_swap_page+0x6ff/0x4250 mm/memory.c:3822
 handle_pte_fault mm/memory.c:4981 [inline]
 __handle_mm_fault mm/memory.c:5119 [inline]
 handle_mm_fault+0x160a/0x62b0 mm/memory.c:5284
 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x2ac/0x860 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:__get_user_8+0x11/0x20 arch/x86/lib/getuser.S:88
Code: 48 c1 fa 3f 48 09 d0 0f 01 cb 8b 10 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 89 c2 48 c1 fa 3f 48 09 d0 0f 01 cb <48> 8b 10 31 c0 0f 01 ca c3 66 0f 1f 44 00 00 f3 0f 1e fa 0f 01 cb
RSP: 0018:ffffc90005237d78 EFLAGS: 00050202
RAX: 00005555569beda8 RBX: ffff88802143ee80 RCX: ffffc90005237c03
RDX: 0000000000000000 RSI: ffffffff8b0ab620 RDI: ffffffff8b5982e0
RBP: ffffc90005237ea8 R08: ffffffff8e9a316f R09: 1ffffffff1d3462d
R10: dffffc0000000000 R11: fffffbfff1d3462e R12: ffffc90005237d80
R13: ffffc90005237fd8 R14: dffffc0000000000 R15: ffff88802143d940
 rseq_get_rseq_cs kernel/rseq.c:161 [inline]
 rseq_ip_fixup kernel/rseq.c:281 [inline]
 __rseq_handle_notify_resume+0x158/0x1480 kernel/rseq.c:329
 rseq_handle_notify_resume include/linux/sched.h:2353 [inline]
 resume_user_mode_work include/linux/resume_user_mode.h:61 [inline]
 exit_to_user_mode_loop+0xb4/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f965caa7ef5
RSP: 002b:00007fffb451d1c0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 0000000000000051 RCX: 00007f965caa7ef5
RDX: 00007fffb451d200 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffb451d28c R08: 0000000000000000 R09: 00007fffb45f20b0
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000002f331 R14: 000000000002efe8 R15: 0000000000000004
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8d32c420 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #0: ffffffff8d32c420 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #0: ffffffff8d32c420 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
4 locks held by kworker/u4:4/59:
 #0: ffff8880248f7d38 ((wq_completion)loop0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff8880248f7d38 ((wq_completion)loop0){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
 #1: ffffc900015a7d20 ((work_completion)(&lo->rootcg_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc900015a7d20 ((work_completion)(&lo->rootcg_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
 #2: ffff88801467a410 (sb_writers#5){.+.+}-{0:0}, at: process_one_work kernel/workqueue.c:2630 [inline]
 #2: ffff88801467a410 (sb_writers#5){.+.+}-{0:0}, at: process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703
 #3: ffff888077024520 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
 #3: ffff888077024520 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: shmem_file_write_iter+0x83/0x120 mm/shmem.c:2855
1 lock held by klogd/4472:
 #0: ffff8880b983c318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
2 locks held by getty/4780:
 #0: ffff8880268090a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015b72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.0/5385:
 #0: ffff88807d424420 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
 #0: ffff88807d424420 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5311 [inline]
 #0: ffff88807d424420 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2d0 mm/memory.c:5371
4 locks held by kworker/1:5/5426:
 #0: ffff8880b993c318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
 #1: ffff8880b9928808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:999
 #2: ffff8880b99296d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999
 #3: ffffffff9211a0b0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x163/0x530 lib/debugobjects.c:717

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc5-syzkaller-00192-g10a6e5feccb8-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfa9/0xff0 kernel/hung_task.c:379
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4472 Comm: klogd Not tainted 6.6.0-rc5-syzkaller-00192-g10a6e5feccb8-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
RIP: 0010:do_raw_spin_lock+0x8d/0x3a0 kernel/locking/spinlock_debug.c:114
Code: f1 04 f3 f3 f3 48 89 f1 48 89 74 24 38 48 89 04 16 48 8d 5f 04 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 1c 02 00 00 8b 03 <3d> ad 4e ad de 0f 85 5c 01 00 00 49 8d 5c 24 10 48 89 d8 48 c1 e8
RSP: 0018:ffffc9000314f320 EFLAGS: 00000046
RAX: 00000000dead4ead RBX: ffffffff9216ca7c RCX: 1ffff92000629e6c
RDX: dffffc0000000000 RSI: 1ffff92000629e6c RDI: ffffffff9216ca78
RBP: ffffc9000314f3f0 R08: dffffc0000000000 R09: 1ffffffff20dee70
R10: dffffc0000000000 R11: fffffbfff20dee71 R12: ffffffff9216ca78
R13: 1ffff92000629e80 R14: ffffffff9216ca78 R15: dffffc0000000000
FS:  00007f88f9115380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75a0395083 CR3: 00000000255b1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162
 __debug_check_no_obj_freed lib/debugobjects.c:1020 [inline]
 debug_check_no_obj_freed+0xcc/0x420 lib/debugobjects.c:1063
 free_pages_prepare mm/page_alloc.c:1142 [inline]
 free_unref_page_prepare+0x241/0x9f0 mm/page_alloc.c:2312
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405
 __slab_free+0x2f6/0x390 mm/slub.c:3715
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762
 slab_alloc_node mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x148/0x330 mm/slub.c:3523
 __alloc_skb+0x181/0x420 net/core/skbuff.c:640
 alloc_skb include/linux/skbuff.h:1286 [inline]
 alloc_skb_with_frags+0xc3/0x780 net/core/skbuff.c:6313
 sock_alloc_send_pskb+0x919/0xa50 net/core/sock.c:2795
 unix_dgram_sendmsg+0x659/0x2070 net/unix/af_unix.c:1953
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x484/0x640 net/socket.c:2194
 __do_sys_sendto net/socket.c:2206 [inline]
 __se_sys_sendto net/socket.c:2202 [inline]
 __x64_sys_sendto+0xde/0xf0 net/socket.c:2202
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f88f92779b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc01314fc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f88f92779b5
RDX: 000000000000008e RSI: 000055d251be47b0 RDI: 0000000000000003
RBP: 000055d251bde910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f88f9405212 R14: 00007ffc013150c8 R15: 0000000000000000
 </TASK>