INFO: task syz-executor:9882 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22504 pid:9882  tgid:9882  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x883/0x1080
 down_write+0x1bc/0x200
 vfs_unlink+0xed/0x6c0
 filename_unlinkat+0x3cd/0x610
 __se_sys_unlink+0x2e/0x140
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1973b9bec7
RSP: 002b:00007ffc7d551178 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1973b9bec7
RDX: 00007ffc7d5511a0 RSI: 00007ffc7d551230 RDI: 00007ffc7d551230
RBP: 00007ffc7d551230 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc7d552320
R13: 00007f1973c32120 R14: 0000000000045bec R15: 00007ffc7d5533f0
 </TASK>
INFO: task syz.8.1053:10882 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.1053      state:D stack:20472 pid:10882 tgid:10882 ppid:9882   task_flags:0x400640 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 lock_metapage+0x1ff/0x400
 __get_metapage+0x49a/0xe20
 xtSplitPage+0x281/0x2150
 xtSplitUp+0x33c/0x1fc0
 xtInsert+0x452/0xf20
 extAlloc+0xad9/0x1020
 jfs_get_block+0x358/0xad0
 __block_write_begin_int+0x6c6/0x1910
 block_write_begin+0x8d/0x120
 jfs_write_begin+0x35/0x80
 generic_perform_write+0x2e2/0x8f0
 generic_file_write_iter+0x14a/0x680
 __kernel_write_iter+0x41e/0x880
 dump_user_range+0xc19/0x12c0
 elf_core_dump+0x34c2/0x3ad0
 coredump_write+0x1216/0x1910
 vfs_coredump+0x3807/0x4530
 get_signal+0x1107/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 irqentry_exit+0x284/0x730
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f1973a52877
RSP: 002b:00007f1974a2b0a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f1973b9cdd9
RDX: 00007f1974a2b0c0 RSI: 00007f1974a2b1f0 RDI: 000000000000000b
RBP: 00007f1973c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f1973e16038 R14: 00007f1973e15fa0 R15: 00007ffc7d552ff8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5439:
 #0: ffff8881707000a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
4 locks held by kworker/u9:9/8015:
 #0: ffff8881622f1940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90007b9fc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff8881708980d8 (&type->s_umount_key#93){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff8881b4121378 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
3 locks held by syz-executor/9882:
 #0: ffff888170898410 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881b4121ff8 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: filename_unlinkat+0x2a7/0x610
 #2: ffff8881b4121718 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: vfs_unlink+0xed/0x6c0
4 locks held by syz.8.1053/10882:
 #0: ffff888170898410 (sb_writers#19){.+.+}-{0:0}, at: vfs_coredump+0x3807/0x4530
 #1: ffff8881b4121718 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680
 #2: ffff8881b41212f0 (&jfs_ip->rdwrlock#3){+.+.}-{4:4}, at: jfs_get_block+0x153/0xad0
 #3: ffff8881b4121378 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: extAlloc+0x130/0x1020
2 locks held by syz.2.2165/14917:
 #0: ffff8881708980d8 (&type->s_umount_key#93){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
 #1: ffff88816d2d4810 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x209/0xbf0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:pv_native_safe_halt+0xf/0x20
Code: 4b 7e 02 e9 93 f6 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 13 71 21 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8e607dc0 EFLAGS: 00000206
RAX: 00000000003c1799 RBX: ffffffff819a815a RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8dfa47b3 RDI: ffffffff8c28abe0
RBP: ffffffff8e607eb0 R08: ffff8881210339db R09: 1ffff1102420673b
R10: dffffc0000000000 R11: ffffed102420673c R12: 0000000000000000
R13: 1ffffffff1cd25d8 R14: 0000000000000000 R15: 1ffffffff1cd25d8
FS:  0000000000000000(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd549fea2f8 CR3: 000000016e728000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 default_idle+0x9/0x20
 default_idle_call+0x72/0xb0
 do_idle+0x36a/0x5f0
 cpu_startup_entry+0x43/0x60
 rest_init+0x2de/0x300
 start_kernel+0x38a/0x3e0
 x86_64_start_reservations+0x24/0x30
 x86_64_start_kernel+0x143/0x1c0
 common_startup_64+0x13e/0x147
 </TASK>
