INFO: task kworker/1:1H:3358 blocked for more than 143 seconds. Not tainted 5.12.0-rc2-next-20210312-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1H state:D stack:27816 pid: 3358 ppid: 2 flags:0x00004000 Workqueue: glock_workqueue glock_work_func Call Trace: context_switch kernel/sched/core.c:4351 [inline] __schedule+0x90c/0x2150 kernel/sched/core.c:5101 schedule+0xcf/0x270 kernel/sched/core.c:5180 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+0x137/0x150 kernel/locking/rwsem.c:1407 freeze_super+0x41/0x330 fs/super.c:1664 freeze_go_sync+0x1e2/0x330 fs/gfs2/glops.c:574 do_xmote+0x2ff/0xbc0 fs/gfs2/glock.c:630 run_queue+0x323/0x680 fs/gfs2/glock.c:767 glock_work_func+0xff/0x3f0 fs/gfs2/glock.c:934 process_one_work+0x98d/0x1600 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:294 INFO: task syz-executor.3:10403 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:25632 pid:10403 ppid: 8439 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4351 [inline] __schedule+0x90c/0x2150 kernel/sched/core.c:5101 schedule+0xcf/0x270 kernel/sched/core.c:5180 schedule_timeout+0x1db/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+0x168/0x270 kernel/sched/completion.c:138 flush_workqueue+0x3ff/0x13e0 kernel/workqueue.c:2838 gfs2_gl_hash_clear+0xc8/0x270 fs/gfs2/glock.c:1998 gfs2_fill_super+0x2005/0x2680 fs/gfs2/ops_fstype.c:1254 get_tree_bdev+0x440/0x760 fs/super.c:1292 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1277 vfs_get_tree+0x89/0x2f0 fs/super.c:1497 do_new_mount fs/namespace.c:2903 [inline] path_mount+0x132a/0x1fa0 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount fs/namespace.c:3431 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46748a RSP: 002b:00007f7cb3215fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046748a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f7cb3216000 RBP: 00007f7cb3216040 R08: 00007f7cb3216040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f7cb3216000 R15: 0000000020047a20 INFO: task syz-executor.3:10403 blocked for more than 143 seconds. Not tainted 5.12.0-rc2-next-20210312-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:25632 pid:10403 ppid: 8439 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4351 [inline] __schedule+0x90c/0x2150 kernel/sched/core.c:5101 schedule+0xcf/0x270 kernel/sched/core.c:5180 schedule_timeout+0x1db/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+0x168/0x270 kernel/sched/completion.c:138 flush_workqueue+0x3ff/0x13e0 kernel/workqueue.c:2838 gfs2_gl_hash_clear+0xc8/0x270 fs/gfs2/glock.c:1998 gfs2_fill_super+0x2005/0x2680 fs/gfs2/ops_fstype.c:1254 get_tree_bdev+0x440/0x760 fs/super.c:1292 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1277 vfs_get_tree+0x89/0x2f0 fs/super.c:1497 do_new_mount fs/namespace.c:2903 [inline] path_mount+0x132a/0x1fa0 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount fs/namespace.c:3431 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46748a RSP: 002b:00007f7cb3215fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046748a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f7cb3216000 RBP: 00007f7cb3216040 R08: 00007f7cb3216040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f7cb3216000 R15: 0000000020047a20 Showing all locks held in the system: 2 locks held by kworker/u4:3/112: 1 lock held by khungtaskd/1641: #0: ffffffff8bf74560 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6332 3 locks held by kworker/1:1H/3358: #0: ffff888017cd5d38 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888017cd5d38 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888017cd5d38 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888017cd5d38 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888017cd5d38 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888017cd5d38 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc90002f6fda8 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 #2: ffff888064b4c0e0 (&type->s_umount_key#71){+.+.}-{3:3}, at: freeze_super+0x41/0x330 fs/super.c:1664 1 lock held by syz-executor.3/10403: #0: ffff888064b4c0e0 (&type->s_umount_key#70/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xab0 fs/super.c:229 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1641 Comm: khungtaskd Not tainted 5.12.0-rc2-next-20210312-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+0x141/0x1d7 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+0xd8e/0xf40 kernel/hung_task.c:338 kthread+0x3b1/0x4a0 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: 4851 Comm: systemd-journal Not tainted 5.12.0-rc2-next-20210312-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kasan_quarantine_put+0xc2/0x210 mm/kasan/quarantine.c:195 Code: 01 fb 5b 5d 41 5c 41 5d 41 5e c3 e8 d8 06 c2 ff 48 c7 c3 00 16 03 00 e8 dc 79 53 07 89 c0 48 03 1c c5 e0 46 0d 8b 80 7b 18 00 <48> 89 d8 74 85 e8 e4 0b c2 ff 9c 58 f6 c4 02 0f 85 16 01 00 00 4d RSP: 0018:ffffc9000110fb00 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff8880b9c31600 RCX: 0000000000000000 RDX: ffff888011dcb800 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88805faa8000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8179df6d R11: 0000000000000000 R12: ffff8880109bd140 R13: 0000000000000200 R14: ffff88805faa8000 R15: ffff8880109bd140 FS: 00007f5c16b398c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5c13f56000 CR3: 0000000011e50000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1562 [inline] slab_free_freelist_hook+0x92/0x210 mm/slub.c:1600 slab_free mm/slub.c:3161 [inline] kmem_cache_free+0x8a/0x740 mm/slub.c:3177 putname+0xe1/0x120 fs/namei.c:259 filename_parentat+0x4b1/0x560 fs/namei.c:2504 filename_create+0x9e/0x490 fs/namei.c:3579 user_path_create fs/namei.c:3654 [inline] do_mkdirat+0xa0/0x310 fs/namei.c:3832 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f5c15df4687 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:00007ffcdc938db8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcdc93bcd0 RCX: 00007f5c15df4687 RDX: 00007f5c16865a00 RSI: 00000000000001ed RDI: 0000563ed12818a0 RBP: 00007ffcdc938df0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffcdc93bcd0 R15: 00007ffcdc9392e0