INFO: task kworker/1:1H:3278 blocked for more than 143 seconds. Not tainted 5.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1H state:D stack:27832 pid: 3278 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.0:12287 blocked for more than 143 seconds. Not tainted 5.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:25888 pid:12287 ppid: 8372 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:00007f8833de2fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046797a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f8833de3000 RBP: 00007f8833de3040 R08: 00007f8833de3040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f8833de3000 R15: 0000000020047a20 Showing all locks held in the system: 1 lock held by khungtaskd/1619: #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/3278: #0: ffff888017b88538 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfd0 kernel/workqueue.c:2248 #1: ffffc900028cfd78 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x733/0xfd0 kernel/workqueue.c:2250 #2: ffff88802d07c0e0 (&type->s_umount_key#55){+.+.}-{3:3}, at: freeze_super+0x44/0x3c0 fs/super.c:1664 1 lock held by in:imklog/8052: #0: ffff888013ec6ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:961 1 lock held by syz-executor.0/12287: #0: ffff88802d07c0e0 (&type->s_umount_key#54/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x860 fs/super.c:229 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1619 Comm: khungtaskd Not tainted 5.12.0-rc5-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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4809 Comm: systemd-journal Not tainted 5.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:214 [inline] RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] RIP: 0010:hlock_class kernel/locking/lockdep.c:198 [inline] RIP: 0010:mark_lock+0x142/0x1fe0 kernel/locking/lockdep.c:4456 Code: 00 8b 1f 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 75 93 8f be 08 00 00 00 e8 16 f1 5f 00 48 0f a3 1d 3e 66 36 0e <4c> 89 74 24 10 72 25 48 c7 c0 80 8b f8 8f 48 c1 e8 03 42 8a 04 28 RSP: 0018:ffffc9000134f8b0 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 000000000000002b RCX: ffffffff815d0f3a RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f937580 RBP: ffffc9000134f9d0 R08: dffffc0000000000 R09: fffffbfff1f26eb1 R10: fffffbfff1f26eb1 R11: 0000000000000000 R12: 0000000000000009 R13: dffffc0000000000 R14: ffff888025beb880 R15: 0000000000000200 FS: 00007f4731ee48c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f472f318000 CR3: 000000002626c000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_usage kernel/locking/lockdep.c:4399 [inline] __lock_acquire+0xcbf/0x5e60 kernel/locking/lockdep.c:4854 lock_acquire+0x126/0x650 kernel/locking/lockdep.c:5510 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock include/linux/rcupdate.h:656 [inline] path_init+0x104/0x11a0 fs/namei.c:2299 path_parentat fs/namei.c:2471 [inline] filename_parentat+0x1a6/0xfd0 fs/namei.c:2494 filename_create+0x5e/0x6b0 fs/namei.c:3579 user_path_create fs/namei.c:3654 [inline] do_mkdirat+0x5a/0x370 fs/namei.c:3832 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f473119f687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffcb4b410a8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcb4b44110 RCX: 00007f473119f687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 0000561c0307b8a0 RBP: 00007ffcb4b410e0 R08: 0000561c01c933e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000561c0307b8a0 R15: 00007ffcb4b41720