INFO: task syz.2.90:4079 blocked for more than 430 seconds. Tainted: G W syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.90 state:D stack:0 pid:4079 tgid:4077 ppid:3820 task_flags:0x400140 flags:0x00400011 Call trace: __switch_to+0x20c/0x520 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5520 [inline] __schedule+0xf98/0x34f4 kernel/sched/core.c:7270 __schedule_loop kernel/sched/core.c:7347 [inline] schedule+0xcc/0x288 kernel/sched/core.c:7362 do_uevent+0x2d8/0x4a0 fs/dlm/lockspace.c:206 new_lockspace fs/dlm/lockspace.c:583 [inline] __dlm_new_lockspace+0xf9c/0x1800 fs/dlm/lockspace.c:638 dlm_new_user_lockspace+0x14/0x34 fs/dlm/lockspace.c:671 device_create_lockspace fs/dlm/user.c:414 [inline] device_write+0xe38/0x173c fs/dlm/user.c:606 vfs_write+0x1dc/0xbac fs/read_write.c:685 ksys_write+0xf0/0x1e0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x70/0xa0 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x74/0x240 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:121 do_el0_svc_compat+0x40/0x58 arch/arm64/kernel/syscall.c:146 el0_svc_compat+0x54/0x264 arch/arm64/kernel/entry-common.c:909 el0t_32_sync_handler+0x88/0xac arch/arm64/kernel/entry-common.c:927 el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595 Showing all locks held in the system: locks held by pr/ttyAMA-1/31: 2, last CPU#0: #0: ffff8000878e3278 (console_srcu){....}-{0:0}, at: __srcu_read_lock_nmisafe include/linux/srcu.h:151 [inline] #0: ffff8000878e3278 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:438 [inline] #0: ffff8000878e3278 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x34/0x68 kernel/printk/printk.c:291 #1: ffff00006bf8d0c8 (bh_lock){+.-.}-{3:3}, at: napi_skb_cache_get+0xd4/0x8b8 net/core/skbuff.c:289 locks held by khungtaskd/32: 1, last CPU#1: #0: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #0: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x40/0x190 kernel/locking/lockdep.c:6793 locks held by kworker/u8:7/1049: 2, on CPU#1: #0: ffff00000e04c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3362 #1: ffff80008f177c70 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3361 locks held by kworker/u8:9/1564: 3, last CPU#1: #0: ffff00000e04c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12ec/0x1c00 kernel/workqueue.c:3362 #1: ffff80008fa27c70 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x780/0x1c00 kernel/workqueue.c:3361 #2: ffff00001a414258 (&devlink->lock_key#6){+.+.}-{4:4}, at: devl_trylock+0x18/0x30 net/devlink/core.c:314 locks held by klogd/3188: 1, last CPU#1: #0: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #0: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: sock_def_readable+0x90/0x5d0 net/core/sock.c:3655 locks held by getty/3326: 2, on CPU#1: #0: ffff0000157120a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008dcab2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x420/0xec0 drivers/tty/n_tty.c:2211 locks held by sshd-session/3378: 4, last CPU#1: #0: ffff000014b0d060 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline] #0: ffff000014b0d060 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_shutdown+0x50/0x318 net/ipv4/af_inet.c:913 #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: __ip_queue_xmit+0x54/0x1810 net/ipv4/ip_output.c:476 #2: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #2: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: ip_output+0xa4/0x528 net/ipv4/ip_output.c:432 #3: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #3: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x3b8/0x2014 net/ipv4/ip_output.c:229 locks held by syz-executor/3379: 2, last CPU#1: #0: ffff00000f495078 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: ffff00000f495078 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x108/0xa84 mm/mmap.c:1299 #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x28/0x208 mm/pgtable-generic.c:290 locks held by syz.2.90/4079: 1, on CPU#1: #0: ffff80008d8f0d00 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xb8/0x1800 fs/dlm/lockspace.c:632 locks held by dlm_recoverd/4081: 1, on CPU#1: #0: ffff0000142d4a18 (&ls->ls_in_recovery){+.+.}-{4:4}, at: dlm_recoverd+0x9c/0x1d60 fs/dlm/recoverd.c:400 locks held by syz.0.126/4141: 1, on CPU#0: #0: ffff80008d8f0d00 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xb8/0x1800 fs/dlm/lockspace.c:632 locks held by syz.4.193/4505: 1, on CPU#1: #0: ffff80008d8f0d00 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xb8/0x1800 fs/dlm/lockspace.c:632 locks held by syz.3.247/4740: 1, on CPU#0: #0: ffff80008d8f0d00 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xb8/0x1800 fs/dlm/lockspace.c:632 locks held by syz-executor/4759: 1, last CPU#1: #0: ffff800087df5c38 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:304 [inline] #0: ffff800087df5c38 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline] #0: ffff800087df5c38 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_path_number_perm+0x1d8/0x478 security/tomoyo/file.c:727 locks held by rm/4926: 4, last CPU#1: #0: ffff000067d73948 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x100/0x3bc mm/mmap_lock.c:310 #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: do_fault_around mm/memory.c:5895 [inline] #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: do_read_fault mm/memory.c:5929 [inline] #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: do_fault+0x584/0xe28 mm/memory.c:6072 #2: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #2: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: filemap_map_pages+0x14c/0x16c0 mm/filemap.c:3921 #3: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #3: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x28/0x208 mm/pgtable-generic.c:290 locks held by modprobe/4927: 2, last CPU#0: #0: ffff00001a472f78 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: ffff00001a472f78 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x108/0xa84 mm/mmap.c:1299 #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:847 [inline] #1: ffff8000879d1660 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x28/0x208 mm/pgtable-generic.c:290 =============================================