INFO: task hung in mount

Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
linux-4.14	INFO: task hung in mount_bdev			1	1839d	1839d	0/1	auto-closed as invalid on 2020/03/08 13:23
upstream	INFO: task hung in mount_bdev isofs			1	2170d	2169d	0/28	closed as dup on 2018/12/14 15:35
linux-4.14	INFO: task hung in mount_bdev (3)	C		5	635d	1434d	0/1	upstream: reported C repro on 2020/12/19 04:11
linux-4.14	INFO: task hung in mount_bdev (2)			1	1701d	1701d	0/1	auto-closed as invalid on 2020/07/24 15:46
upstream	INFO: task hung in mount_bdev (2) udf ext4	C	done	1	2034d	2030d	0/28	closed as dup on 2019/05/03 10:52

linux-4.14

INFO: task hung in mount_bdev

1839d

0/1

auto-closed as invalid on 2020/03/08 13:23

upstream

INFO: task hung in mount_bdev isofs

2170d

2169d

0/28

closed as dup on 2018/12/14 15:35

linux-4.14

INFO: task hung in mount_bdev (3)

635d

1434d

0/1

upstream: reported C repro on 2020/12/19 04:11

linux-4.14

INFO: task hung in mount_bdev (2)

1701d

0/1

auto-closed as invalid on 2020/07/24 15:46

upstream

INFO: task hung in mount_bdev (2) udf ext4

done

2034d

2030d

0/28

closed as dup on 2019/05/03 10:52


Created	Duration	User	Repo	Result
2021/11/04 07:43	12m	bisect fix	linux-4.19.y	error job log
2021/10/05 07:09	32m	bisect fix	linux-4.19.y	OK (0) job log log
2021/09/05 06:37	31m	bisect fix	linux-4.19.y	OK (0) job log log
2021/08/06 06:00	37m	bisect fix	linux-4.19.y	OK (0) job log log
2021/07/07 05:27	31m	bisect fix	linux-4.19.y	OK (0) job log log
2021/06/07 04:50	37m	bisect fix	linux-4.19.y	OK (0) job log log
2021/05/08 03:29	34m	bisect fix	linux-4.19.y	OK (0) job log log
2021/03/24 17:55	32m	bisect fix	linux-4.19.y	OK (0) job log log
2021/02/22 17:23	32m	bisect fix	linux-4.19.y	OK (0) job log log
2021/02/18 21:00	1h38m	bisect fix	linux-4.19.y	error job log
2021/02/15 01:27	0m	bisect fix	linux-4.19.y	error job log
2020/12/29 16:51	33m	bisect fix	linux-4.19.y	OK (0) job log log
2020/11/29 09:36	34m	bisect fix	linux-4.19.y	OK (0) job log log
2020/10/30 09:03	32m	bisect fix	linux-4.19.y	OK (0) job log log
2020/09/30 05:18	35m	bisect fix	linux-4.19.y	OK (0) job log log
2020/08/31 04:41	36m	bisect fix	linux-4.19.y	OK (0) job log log
2020/08/01 04:05	35m	bisect fix	linux-4.19.y	OK (0) job log log
2020/07/01 23:24	33m	bisect fix	linux-4.19.y	OK (0) job log log
2020/06/01 22:34	35m	bisect fix	linux-4.19.y	OK (0) job log log
2020/05/02 21:58	35m	bisect fix	linux-4.19.y	OK (0) job log log
2020/04/02 21:24	33m	bisect fix	linux-4.19.y	OK (0) job log log
2020/03/03 19:54	37m	bisect fix	linux-4.19.y	OK (0) job log log
2020/02/02 19:19	35m	bisect fix	linux-4.19.y	OK (0) job log log
2020/01/03 17:01	34m	bisect fix	linux-4.19.y	OK (0) job log log
2019/12/04 13:46	33m	bisect fix	linux-4.19.y	OK (0) job log log

UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop1, sector 512 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 INFO: task syz-executor984:8223 blocked for more than 140 seconds. Not tainted 4.19.167-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor984 D29672 8223 8137 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 mount_bdev+0x90/0x3b0 fs/super.c:1125 mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44aa29 Code: Bad RIP value. RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 INFO: task syz-executor984:8219 blocked for more than 140 seconds. Not tainted 4.19.167-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor984 D29672 8219 8140 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 grab_super+0xa2/0x350 fs/super.c:383 sget_userns+0x352/0xcd0 fs/super.c:511 sget+0x102/0x140 fs/super.c:570 mount_bdev+0xf8/0x3b0 fs/super.c:1131 mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44aa29 Code: Bad RIP value. RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 INFO: task syz-executor984:8222 blocked for more than 140 seconds. Not tainted 4.19.167-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor984 D29504 8222 8142 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 mount_bdev+0x90/0x3b0 fs/super.c:1125 mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44aa29 Code: Bad RIP value. RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 INFO: task syz-executor984:8224 blocked for more than 140 seconds. Not tainted 4.19.167-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor984 D29672 8224 8143 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 mount_bdev+0x90/0x3b0 fs/super.c:1125 mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44aa29 Code: Bad RIP value. RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 INFO: task syz-executor984:8247 blocked for more than 140 seconds. Not tainted 4.19.167-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor984 D29504 8247 8141 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 mount_bdev+0x90/0x3b0 fs/super.c:1125 mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44aa29 Code: Bad RIP value. RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 000000009c04e342 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7808: #0: 0000000014f05fa6 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by syz-executor984/8220: 1 lock held by syz-executor984/8223: #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 2 locks held by syz-executor984/8219: #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 #1: 00000000d837f47f (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383 1 lock held by syz-executor984/8222: #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 1 lock held by syz-executor984/8224: #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 1 lock held by syz-executor984/8247: #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1569 Comm: khungtaskd Not tainted 4.19.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4690 Comm: systemd-journal Not tainted 4.19.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: 00 6e 88 4c 89 25 dc 57 bf 0b 41 bc f4 ff ff ff e8 00 fa ea ff 48 c7 05 c6 57 bf 0b 00 00 00 00 e9 39 ec ff ff 90 48 8b 34 24 <65> 48 8b 04 25 80 df 01 00 65 8b 15 fc 0c 9d 7e 81 e2 00 01 1f 00 RSP: 0018:ffff8880a0c6f810 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00000003aeca44c4 RCX: ffffffff81ab9c52 RDX: 00000003aeca44c4 RSI: ffffffff81ab9c60 RDI: 0000000000000006 RBP: 00000003aeca44c4 R08: 0000000000000000 R09: 00000003aeca44c4 R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000000 R13: ffffed101431ca5f R14: ffff8880a18e52f0 R15: dffffc0000000000 FS: 00007faa928758c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa8fc62000 CR3: 00000000a0c97000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __read_once_size include/linux/compiler.h:207 [inline] dentry_cmp fs/dcache.c:235 [inline] __d_lookup_rcu+0x270/0x6b0 fs/dcache.c:2209 lookup_fast+0x11b/0x1080 fs/namei.c:1572 walk_component+0xde/0xda0 fs/namei.c:1807 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142 link_path_walk fs/namei.c:2073 [inline] path_openat+0x1db/0x2df0 fs/namei.c:3536 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7faa91e05840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffeed1abc38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffeed1abf40 RCX: 00007faa91e05840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000564bdd12c060 RBP: 000000000000000d R08: 00007faa91defc88 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000564bdd11f040 R14: 00007ffeed1abf00 R15: 0000564bdd12c5f0

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Manager	Title
2021/01/16 01:27	linux-4.19.y	675cc038067f	65a7a854	.config	console log	report	syz	C		ci2-linux-4-19
2019/08/22 05:30	linux-4.19.y	a5aa80588fcd	4ea67ff8	.config	console log	report	syz	C		ci2-linux-4-19
2021/04/08 03:04	linux-4.19.y	b4454811f122	6a81331a	.config	console log	report			info	ci2-linux-4-19	INFO: task hung in mount_bdev

Crashes (3):

Assets (help?)