EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs error (device loop0): ext4_get_journal_inode:4700: comm syz-executor415: inode #836960256: comm syz-executor415: iget: illegal inode # EXT4-fs (loop0): no journal found INFO: task syz-executor415:22062 blocked for more than 140 seconds. Not tainted 4.19.195-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor415 D27560 22062 8118 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_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 kthread_stop+0x109/0x6b0 kernel/kthread.c:588 ext4_fill_super+0x7911/0xc7f0 fs/ext4/super.c:4638 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 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: 0033:0x445b1a Code: Bad RIP value. RSP: 002b:00007fffe0e819d8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fffe0e81a30 RCX: 0000000000445b1a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffe0e819f0 RBP: 00007fffe0e819f0 R08: 00007fffe0e81a30 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200003f8 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 000000004b2d77b7 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7800: #0: 00000000062e6b45 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor415/22062: #0: 00000000c3d985c3 (&type->s_umount_key#25/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 00000000c3d985c3 (&type->s_umount_key#25/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1569 Comm: khungtaskd Not tainted 4.19.195-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/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 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: 4692 Comm: systemd-journal Not tainted 4.19.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:deref_stack_reg+0x28/0x1d0 arch/x86/kernel/unwind_orc.c:330 Code: 00 00 48 b8 00 00 00 00 00 fc ff df 41 56 41 55 49 89 d5 41 54 49 89 fc 55 48 89 f5 53 48 83 ec 68 48 c7 44 24 08 b3 8a b5 41 <48> 8d 5c 24 08 48 c7 44 24 10 fd 93 b6 89 48 c1 eb 03 48 c7 44 24 RSP: 0018:ffff8880a0f87710 EFLAGS: 00000082 RAX: dffffc0000000000 RBX: 1ffff110141f0efe RCX: ffff8880a0f87da0 RDX: ffff8880a0f87920 RSI: ffff8880a0f87da8 RDI: ffff8880a0f878d8 RBP: ffff8880a0f87da8 R08: ffffffff8b9aeb0a R09: ffffffff8b9aeb06 R10: ffff8880a0f87937 R11: 0000000000074071 R12: ffff8880a0f878d8 R13: ffff8880a0f87920 R14: ffff8880a0f878d8 R15: ffffffff8b9aeb06 FS: 00007f6da29ec8c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6da0006000 CR3: 00000000a1362000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x9fc/0x1400 arch/x86/kernel/unwind_orc.c:502 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x126/0x1f0 mm/kasan/kasan.c:521 __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x7f/0x260 mm/slab.c:3765 putname+0xe1/0x120 fs/namei.c:261 filename_parentat+0x4da/0x590 fs/namei.c:2399 filename_create+0x9e/0x490 fs/namei.c:3621 user_path_create fs/namei.c:3696 [inline] do_mkdirat+0xa0/0x2d0 fs/namei.c:3834 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6da1ca7687 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:00007ffc94c05ef8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc94c08e10 RCX: 00007f6da1ca7687 RDX: 00007f6da2718a00 RSI: 00000000000001ed RDI: 0000556d992df8a0 RBP: 00007ffc94c05f30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffc94c08e10 R15: 00007ffc94c06420