INFO: task kworker/1:1H:2030 blocked for more than 143 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1H state:D stack:27496 pid: 2030 ppid: 2 flags:0x00004000 Workqueue: glock_workqueue glock_work_func Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 rwsem_down_write_slowpath+0x7c2/0x11d0 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+0x137/0x150 kernel/locking/rwsem.c:1407 freeze_super+0x41/0x330 fs/super.c:1665 freeze_go_sync+0x1e2/0x330 fs/gfs2/glops.c:577 do_xmote+0x2ff/0xc80 fs/gfs2/glock.c:638 run_queue+0x323/0x680 fs/gfs2/glock.c:783 glock_work_func+0xff/0x3f0 fs/gfs2/glock.c:950 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task syz-executor.4:9645 blocked for more than 143 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26392 pid: 9645 ppid: 8530 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x1db/0x2a0 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+0x176/0x280 kernel/sched/completion.c:138 flush_workqueue+0x3ff/0x1600 kernel/workqueue.c:2839 gfs2_gl_hash_clear+0xc8/0x270 fs/gfs2/glock.c:2019 gfs2_fill_super+0x1ffd/0x2680 fs/gfs2/ops_fstype.c:1251 get_tree_bdev+0x440/0x760 fs/super.c:1293 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1274 vfs_get_tree+0x89/0x2f0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x132a/0x1fa0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount fs/namespace.c:3433 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x467afa RSP: 002b:00007f2d29b6efa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f2d29b6f000 RBP: 00007f2d29b6f040 R08: 00007f2d29b6f040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f2d29b6f000 R15: 000000002000df80 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1640 Comm: khungtaskd Tainted: G W 5.13.0-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_lvl+0xcd/0x134 lib/dump_stack.c:96 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd4b/0xfb0 kernel/hung_task.c:294 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4857 Comm: systemd-journal Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197 Code: 01 f0 4d 89 03 e9 63 fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 <65> 8b 05 e9 30 8d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc900017c7f08 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88801bd461c0 RDI: 0000000000000003 RBP: 00000000000000d0 R08: 0000000000000000 R09: ffffffff8deb2457 R10: ffffffff814bc7d6 R11: 0000000000000000 R12: 00000000000012f9 R13: ffff88801bd3fcc0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f56322938c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f562c2f8000 CR3: 0000000019ff4000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:724 [inline] __task_pid_nr_ns+0x1bc/0x4b0 kernel/pid.c:501 task_tgid_vnr include/linux/sched.h:1502 [inline] __do_sys_getpid+0x1a/0x20 kernel/sys.c:925 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f563152bf17 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:00007ffe28a0c8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 00005640ec9e2200 RCX: 00007f563152bf17 RDX: 00007ffe28a0c988 RSI: 0000000000000001 RDI: 00005640ec9e2200 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000206 R12: 00007ffe28a0c988 R13: 00000000000012f9 R14: 00007ffe28a0f770 R15: 00007ffe28a0cd80