EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs error (device loop3): ext4_get_journal_inode:4623: comm syz-executor032: inode #836960256: comm syz-executor032: iget: illegal inode # EXT4-fs (loop3): no journal found INFO: task syz-executor032:9065 blocked for more than 140 seconds. Not tainted 4.14.243-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor032 D27912 9065 7958 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 kthread_stop+0xce/0x640 kernel/kthread.c:555 ext4_fill_super+0x6880/0xb290 fs/ext4/super.c:4561 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x445c0a RSP: 002b:00007fffe35773b8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fffe3577410 RCX: 0000000000445c0a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffe35773d0 RBP: 00007fffe35773d0 R08: 00007fffe3577410 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005 INFO: task syz-executor032:9080 blocked for more than 140 seconds. Not tainted 4.14.243-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor032 D27912 9080 7959 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 kthread_stop+0xce/0x640 kernel/kthread.c:555 ext4_fill_super+0x6880/0xb290 fs/ext4/super.c:4561 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x445c0a RSP: 002b:00007fffe35773b8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fffe3577410 RCX: 0000000000445c0a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffe35773d0 RBP: 00007fffe35773d0 R08: 00007fffe3577410 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005 INFO: task syz-executor032:9509 blocked for more than 140 seconds. Not tainted 4.14.243-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor032 D27912 9509 7956 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 kthread_stop+0xce/0x640 kernel/kthread.c:555 ext4_fill_super+0x6880/0xb290 fs/ext4/super.c:4561 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x445c0a RSP: 002b:00007fffe35773b8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fffe3577410 RCX: 0000000000445c0a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffe35773d0 RBP: 00007fffe35773d0 R08: 00007fffe3577410 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005 INFO: task syz-executor032:9670 blocked for more than 140 seconds. Not tainted 4.14.243-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor032 D27912 9670 7954 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 kthread_stop+0xce/0x640 kernel/kthread.c:555 ext4_fill_super+0x6880/0xb290 fs/ext4/super.c:4561 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x445c0a RSP: 002b:00007fffe35773b8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fffe3577410 RCX: 0000000000445c0a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffe35773d0 RBP: 00007fffe35773d0 R08: 00007fffe3577410 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005 INFO: task syz-executor032:11534 blocked for more than 140 seconds. Not tainted 4.14.243-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor032 D27912 11534 7955 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 kthread_stop+0xce/0x640 kernel/kthread.c:555 ext4_fill_super+0x6880/0xb290 fs/ext4/super.c:4561 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x445c0a RSP: 002b:00007fffe35773b8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fffe3577410 RCX: 0000000000445c0a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffe35773d0 RBP: 00007fffe35773d0 R08: 00007fffe3577410 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/1526: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by in:imklog/7740: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 fs/file.c:769 1 lock held by syz-executor032/9065: #0: (&type->s_umount_key#25/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#25/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 1 lock held by syz-executor032/9080: #0: (&type->s_umount_key#25/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#25/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 1 lock held by syz-executor032/9509: #0: (&type->s_umount_key#25/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#25/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 1 lock held by syz-executor032/9670: #0: (&type->s_umount_key#25/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#25/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 1 lock held by syz-executor032/11534: #0: (&type->s_umount_key#25/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#25/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 1 lock held by syz-executor032/23381: #0: (&type->s_umount_key#25/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#25/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1526 Comm: khungtaskd Not tainted 4.14.243-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4620 Comm: systemd-journal Not tainted 4.14.243-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a1590040 task.stack: ffff8880a1598000 RIP: 0033:0x7f663edacc22 RSP: 002b:00007ffe3f5230a0 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000130388 RCX: 0000000000130388 RDX: 0000000000000003 RSI: 0000000000000010 RDI: 000056228bc54120 RBP: 000056228bc50040 R08: 00000000000000e8 R09: 000056228bc54120 R10: 001984fbdb25f2ae R11: 00007f663c7cfd70 R12: 0000000000000006 R13: 0000000000000003 R14: 0000000000000010 R15: 000056228bc54420 FS: 00007f663f1778c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f663c7cf000 CR3: 00000000a217e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400