INFO: task kworker/0:1H:2209 blocked for more than 143 seconds. Not tainted 5.11.0-rc3-next-20210114-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1H state:D stack:27552 pid: 2209 ppid: 2 flags:0x00004000 Workqueue: glock_workqueue glock_work_func Call Trace: context_switch kernel/sched/core.c:4373 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5124 schedule+0xcf/0x270 kernel/sched/core.c:5203 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 kernel/locking/rwsem.c:1407 freeze_super+0x41/0x330 fs/super.c:1663 freeze_go_sync+0x1e2/0x330 fs/gfs2/glops.c:588 do_xmote+0x2ff/0xbc0 fs/gfs2/glock.c:616 run_queue+0x323/0x680 fs/gfs2/glock.c:753 glock_work_func+0xff/0x3f0 fs/gfs2/glock.c:920 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor.5:31508 can't die for more than 143 seconds. task:syz-executor.5 state:D stack:24952 pid:31508 ppid: 28883 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4373 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5124 schedule+0xcf/0x270 kernel/sched/core.c:5203 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1868 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 flush_workqueue+0x3ff/0x13e0 kernel/workqueue.c:2838 gfs2_gl_hash_clear+0xc8/0x270 fs/gfs2/glock.c:1984 gfs2_fill_super+0x2073/0x2720 fs/gfs2/ops_fstype.c:1231 get_tree_bdev+0x440/0x760 fs/super.c:1291 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1254 vfs_get_tree+0x89/0x2f0 fs/super.c:1496 do_new_mount fs/namespace.c:2889 [inline] path_mount+0x12ae/0x1e70 fs/namespace.c:3220 do_mount fs/namespace.c:3233 [inline] __do_sys_mount fs/namespace.c:3441 [inline] __se_sys_mount fs/namespace.c:3418 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3418 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460c6a RSP: 002b:00007f47bbcdda78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f47bbcddb10 RCX: 0000000000460c6a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f47bbcddad0 RBP: 00007f47bbcddad0 R08: 00007f47bbcddb10 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20 INFO: task syz-executor.5:31508 blocked for more than 144 seconds. Not tainted 5.11.0-rc3-next-20210114-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24952 pid:31508 ppid: 28883 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4373 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5124 schedule+0xcf/0x270 kernel/sched/core.c:5203 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1868 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 flush_workqueue+0x3ff/0x13e0 kernel/workqueue.c:2838 gfs2_gl_hash_clear+0xc8/0x270 fs/gfs2/glock.c:1984 gfs2_fill_super+0x2073/0x2720 fs/gfs2/ops_fstype.c:1231 get_tree_bdev+0x440/0x760 fs/super.c:1291 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1254 vfs_get_tree+0x89/0x2f0 fs/super.c:1496 do_new_mount fs/namespace.c:2889 [inline] path_mount+0x12ae/0x1e70 fs/namespace.c:3220 do_mount fs/namespace.c:3233 [inline] __do_sys_mount fs/namespace.c:3441 [inline] __se_sys_mount fs/namespace.c:3418 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3418 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460c6a RSP: 002b:00007f47bbcdda78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f47bbcddb10 RCX: 0000000000460c6a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f47bbcddad0 RBP: 00007f47bbcddad0 R08: 00007f47bbcddb10 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20 Showing all locks held in the system: 1 lock held by khungtaskd/1664: #0: ffffffff8b374160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 3 locks held by kworker/0:1H/2209: #0: ffff88801721f138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801721f138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88801721f138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88801721f138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88801721f138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88801721f138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246 #1: ffffc900080ffda8 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250 #2: ffff88802b4540e0 (&type->s_umount_key#73){+.+.}-{3:3}, at: freeze_super+0x41/0x330 fs/super.c:1663 1 lock held by systemd-journal/4899: 1 lock held by in:imklog/8169: #0: ffff88801b3d6370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 2 locks held by rs:main Q:Reg/8170: 2 locks held by agetty/8190: #0: ffff888017227098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffff888017227130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:904 [inline] #1: ffff888017227130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:927 [inline] #1: ffff888017227130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write+0x27f/0x8b0 drivers/tty/tty_io.c:1062 1 lock held by syz-executor.5/31508: #0: ffff88802b4540e0 (&type->s_umount_key#72/1){+.+.}-{3:3}, at: alloc_super+0x201/0xaf0 fs/super.c:229 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1664 Comm: khungtaskd Not tainted 5.11.0-rc3-next-20210114-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:338 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4899 Comm: systemd-journal Not tainted 5.11.0-rc3-next-20210114-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x7ff9a60e41c0 Code: c3 66 0f 1f 84 00 00 00 00 00 48 8b 50 08 eb d2 66 2e 0f 1f 84 00 00 00 00 00 48 85 ed 74 08 48 c7 45 00 00 00 00 00 4d 85 e4 <74> 3e 5b 49 c7 04 24 00 00 00 00 31 c0 5d 41 5c c3 0f 1f 44 00 00 RSP: 002b:00007ffc4987aa20 EFLAGS: 00000246 RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 0000000000000000 RDX: 00000000ffffffff RSI: 00007ffc4987aa50 RDI: 0000000000000000 RBP: 00007ffc4987aa48 R08: 000055dbd8628218 R09: 000055dbd86267b8 R10: 000055dbd8626780 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffc4987ab48 R14: 000055dbd8540958 R15: 0005b8d7d465f4c5 FS: 00007ff9a641a8c0 GS: 0000000000000000