INFO: task kworker/1:1H:3021 blocked for more than 143 seconds. Not tainted 5.12.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1H state:D stack:26744 pid: 3021 ppid: 2 flags:0x00004000 Workqueue: glock_workqueue glock_work_func Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5073 schedule+0x14b/0x200 kernel/sched/core.c:5152 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x117/0x120 kernel/locking/rwsem.c:1407 freeze_super+0x44/0x3c0 fs/super.c:1664 freeze_go_sync+0x17b/0x3a0 fs/gfs2/glops.c:574 do_xmote+0x6b7/0x14c0 fs/gfs2/glock.c:630 glock_work_func+0x2c3/0x450 fs/gfs2/glock.c:934 process_one_work+0x789/0xfd0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.3:12363 blocked for more than 143 seconds. Not tainted 5.12.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26672 pid:12363 ppid: 8410 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5073 schedule+0x14b/0x200 kernel/sched/core.c:5152 schedule_timeout+0x43/0x250 kernel/time/timer.c:1868 do_wait_for_common+0x266/0x3a0 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 flush_workqueue+0x704/0x1620 kernel/workqueue.c:2838 gfs2_gl_hash_clear+0x6e/0x270 fs/gfs2/glock.c:1998 gfs2_fill_super+0x352c/0x44c0 fs/gfs2/ops_fstype.c:1254 get_tree_bdev+0x406/0x630 fs/super.c:1292 gfs2_get_tree+0x50/0x200 fs/gfs2/ops_fstype.c:1277 vfs_get_tree+0x86/0x270 fs/super.c:1497 do_new_mount fs/namespace.c:2903 [inline] path_mount+0x188a/0x29a0 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46797a RSP: 002b:00007f1615905fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046797a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f1615906000 RBP: 00007f1615906040 R08: 00007f1615906040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f1615906000 R15: 0000000020047a20 Showing all locks held in the system: 2 locks held by kworker/u4:1/25: #0: ffff8880b9c34c98 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x82e/0xb00 kernel/sched/fair.c:10633 #1: ffffc90000dffd78 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x733/0xfd0 kernel/workqueue.c:2250 1 lock held by khungtaskd/1609: #0: ffffffff8c710180 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 3 locks held by kworker/1:1H/3021: #0: ffff8880179c2538 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfd0 kernel/workqueue.c:2248 #1: ffffc90001a97d78 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x733/0xfd0 kernel/workqueue.c:2250 #2: ffff88801d4b80e0 (&type->s_umount_key#80){+.+.}-{3:3}, at: freeze_super+0x44/0x3c0 fs/super.c:1664 2 locks held by in:imklog/8078: #0: ffff88801be3ed70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:961 #1: ffffffff8c5ec538 (logbuf_lock){-...}-{2:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:266 3 locks held by kworker/0:7/9708: 1 lock held by syz-executor.3/12363: #0: ffff88801d4b80e0 (&type->s_umount_key#74/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x860 fs/super.c:229 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1609 Comm: khungtaskd Not tainted 5.12.0-rc4-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+0x176/0x24e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xcfb/0xd40 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4823 Comm: systemd-journal Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_preemption_disabled+0x51/0x190 lib/smp_processor_id.c:16 Code: 65 8b 1d c2 5c ab 76 65 8b 2d f3 b6 ab 76 89 ee 81 e6 ff ff ff 7f 31 ff 0f 1f 44 00 00 81 e5 ff ff ff 7f 74 2a 0f 1f 44 00 00 <65> 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 1e 01 00 00 89 d8 RSP: 0018:ffffc900017cfed8 EFLAGS: 00000046 RAX: 59ff4c61f20f0500 RBX: 0000000000000000 RCX: ffffffff8ff9cb03 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff817f0bf3 R09: fffffbfff1b6b276 R10: fffffbfff1b6b276 R11: 0000000000000000 R12: 0000000000000046 R13: 0000000000000000 R14: ffffffff89b8a600 R15: ffffffff8a119ba0 FS: 00007f1f65de48c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1f63222000 CR3: 0000000026045000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __context_tracking_enter+0x3c/0xf0 kernel/context_tracking.c:70 user_enter_irqoff include/linux/context_tracking.h:41 [inline] __exit_to_user_mode kernel/entry/common.c:129 [inline] syscall_exit_to_user_mode+0x61/0x70 kernel/entry/common.c:303 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f1f6507cf17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007ffc3c9ad3e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: 00000000000012d7 RBX: 00000000000012d7 RCX: 00007f1f6507cf17 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 000056033c24a1e0 RBP: 000056033c24a1e0 R08: 00007ffc3c9df080 R09: 0000000000000000 R10: 00007ffc3c9df0a8 R11: 0000000000000202 R12: ffffffffffffffff R13: 00007ffc3c9ad4b8 R14: 000056033a90f958 R15: 0005be49be4a00f0