INFO: task syz-executor.1:8645 can't die for more than 143 seconds.
task:syz-executor.1  state:D stack:25848 pid: 8645 ppid:  8617 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6296
 schedule+0xd2/0x260 kernel/sched/core.c:6369
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 reclaim_throttle+0x1ce/0x5e0 mm/vmscan.c:1072
 consider_reclaim_throttle mm/vmscan.c:3399 [inline]
 shrink_zones mm/vmscan.c:3486 [inline]
 do_try_to_free_pages+0x7cd/0x1620 mm/vmscan.c:3541
 try_to_free_mem_cgroup_pages+0x2cd/0x840 mm/vmscan.c:3855
 try_charge_memcg+0x298/0x10f0 mm/memcontrol.c:2598
 obj_cgroup_charge_pages+0x1e/0x90 mm/memcontrol.c:3018
 obj_cgroup_charge+0xf3/0x280 mm/memcontrol.c:3287
 memcg_slab_pre_alloc_hook mm/slab.h:519 [inline]
 slab_pre_alloc_hook mm/slab.h:744 [inline]
 slab_alloc_node mm/slub.c:3145 [inline]
 __kmalloc_node+0xa7/0x380 mm/slub.c:4467
 kmalloc_node include/linux/slab.h:604 [inline]
 kvmalloc_node+0x3e/0x100 mm/util.c:580
 kvmalloc include/linux/slab.h:732 [inline]
 seq_buf_alloc fs/seq_file.c:38 [inline]
 single_open_size+0x4a/0x130 fs/seq_file.c:596
 proc_reg_open+0xe0/0x570 fs/proc/inode.c:495
 do_dentry_open+0x4c8/0x1250 fs/open.c:824
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
 do_sys_open fs/open.c:1230 [inline]
 __do_sys_openat fs/open.c:1246 [inline]
 __se_sys_openat fs/open.c:1241 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
 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+0x44/0xae
RIP: 0033:0x7f9728175e99
RSP: 002b:00007f9726aeb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9728288f60 RCX: 00007f9728175e99
RDX: 0000000000000000 RSI: 0000000020002080 RDI: ffffffffffffff9c
RBP: 00007f97281cfff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0ef7f44f R14: 00007f9726aeb300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3280:
 #0: ffff888022b75098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077

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