INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.18' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 30.989858] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 30.997068] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 31.006336] F2FS-fs (loop0): invalid crc value [ 31.036432] ------------[ cut here ]------------ [ 31.041230] kernel BUG at fs/f2fs/inode.c:242! [ 31.046182] invalid opcode: 0000 [#1] SMP KASAN [ 31.050861] Dumping ftrace buffer: [ 31.054384] (ftrace buffer empty) [ 31.058251] Modules linked in: [ 31.061440] CPU: 0 PID: 4543 Comm: syzkaller153755 Not tainted 4.17.0-rc1+ #9 [ 31.068697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.078319] RIP: 0010:f2fs_iget+0x3440/0x3d10 [ 31.082790] RSP: 0018:ffff8801d90370e8 EFLAGS: 00010293 [ 31.088153] RAX: ffff8801d906c400 RBX: ffff8801b6ec10c0 RCX: ffffffff82eaccd4 [ 31.095755] RDX: 0000000000000000 RSI: ffffffff82eaee50 RDI: 0000000000000007 [ 31.103010] RBP: ffff8801d9037410 R08: ffff8801d906c400 R09: ffffed003b2fbab6 [ 31.110264] R10: ffffed003b2fbab6 R11: ffff8801d97dd5b7 R12: ffff8801ad3c8000 [ 31.117522] R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000 [ 31.124778] FS: 0000000001393880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 31.133008] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.138870] CR2: 00007fafd7c0c000 CR3: 00000001d9b5a000 CR4: 00000000001406f0 [ 31.146121] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.153376] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.160629] Call Trace: [ 31.163208] ? f2fs_inode_chksum_set+0xf0/0xf0 [ 31.167773] ? __raw_spin_lock_init+0x1c/0x100 [ 31.172333] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.177329] ? __lockdep_init_map+0x105/0x590 [ 31.181803] ? lockdep_init_map+0x9/0x10 [ 31.185849] ? mark_held_locks+0xc9/0x160 [ 31.189982] ? f2fs_update_extent_cache_range+0x1d0/0x1d0 [ 31.195505] ? __raw_spin_lock_init+0x1c/0x100 [ 31.200069] ? __lockdep_init_map+0x105/0x590 [ 31.204552] ? lockdep_init_map+0x9/0x10 [ 31.208603] ? __raw_spin_lock_init+0x2d/0x100 [ 31.213183] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 31.218190] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.223710] ? build_gc_manager+0x2a1/0x5b0 [ 31.228014] f2fs_fill_super+0x4377/0x7bf0 [ 31.232243] ? f2fs_commit_super+0x400/0x400 [ 31.236639] ? lock_downgrade+0x8e0/0x8e0 [ 31.240781] ? lock_release+0xa10/0xa10 [ 31.244739] ? check_same_owner+0x320/0x320 [ 31.249053] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 31.254064] ? widen_string+0xd8/0x2d0 [ 31.257940] ? rcu_note_context_switch+0x710/0x710 [ 31.262856] ? format_decode+0xae0/0xae0 [ 31.266920] ? graph_lock+0x170/0x170 [ 31.270713] ? widen_string+0x2d0/0x2d0 [ 31.274674] ? sget_userns+0x2dd/0xf20 [ 31.278542] ? find_held_lock+0x13f/0x1c0 [ 31.282672] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.288193] ? bdev_name.isra.7+0x1a1/0x1f0 [ 31.292519] ? print_usage_bug+0xc0/0xc0 [ 31.296563] ? netdev_bits+0xb0/0xb0 [ 31.300266] ? format_decode+0x1a9/0xae0 [ 31.304310] ? set_precision+0xe0/0xe0 [ 31.308189] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 31.313373] ? retint_kernel+0x10/0x10 [ 31.317251] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.322256] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.327019] ? retint_kernel+0x10/0x10 [ 31.330889] ? f2fs_commit_super+0x400/0x400 [ 31.335287] ? sb_set_blocksize+0xa4/0x110 [ 31.339521] mount_bdev+0x30c/0x3e0 [ 31.343130] ? f2fs_commit_super+0x400/0x400 [ 31.347521] ? mount_bdev+0x30c/0x3e0 [ 31.351302] ? f2fs_commit_super+0x400/0x400 [ 31.355692] f2fs_mount+0x34/0x40 [ 31.359132] mount_fs+0xae/0x328 [ 31.362482] vfs_kern_mount.part.34+0xd4/0x4d0 [ 31.367063] ? may_umount+0xb0/0xb0 [ 31.370677] ? _raw_read_unlock+0x22/0x30 [ 31.374818] ? __get_fs_type+0x97/0xc0 [ 31.378692] do_mount+0x564/0x3070 [ 31.382396] ? copy_mount_string+0x40/0x40 [ 31.386618] ? rcu_pm_notify+0xc0/0xc0 [ 31.390495] ? copy_mount_options+0x5f/0x380 [ 31.394909] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.399911] ? kmem_cache_alloc_trace+0x616/0x780 [ 31.404751] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.410276] ? _copy_from_user+0xdf/0x150 [ 31.414409] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.419932] ? copy_mount_options+0x285/0x380 [ 31.424412] ksys_mount+0x12d/0x140 [ 31.428022] __x64_sys_mount+0xbe/0x150 [ 31.431978] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.436981] do_syscall_64+0x1b1/0x800 [ 31.440855] ? syscall_return_slowpath+0x5c0/0x5c0 [ 31.445770] ? syscall_return_slowpath+0x30f/0x5c0 [ 31.450683] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 31.456049] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.460889] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.466152] RIP: 0033:0x443cfa [ 31.469319] RSP: 002b:00007ffca5ac3f88 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 31.477015] RAX: ffffffffffffffda RBX: 0000000020000b70 RCX: 0000000000443cfa [ 31.484267] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffca5ac3f90 [ 31.491533] RBP: 0000000000000003 R08: 0000000020016a00 R09: 000000000000000a [ 31.498788] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000004 [ 31.506038] R13: 0000000000402bf0 R14: 0000000000000000 R15: 0000000000000000 [ 31.513290] Code: 8e fe 48 c7 c2 e0 08 f2 87 be 1c 01 00 00 48 c7 c7 40 09 f2 87 c6 05 88 e7 8b 06 01 e8 3b 4a 72 fe e9 51 ef ff ff e8 d0 41 8e fe <0f> 0b e8 c9 41 8e fe e8 64 b7 78 fe 31 ff 89 c3 89 c6 e8 c9 42 [ 31.532955] RIP: f2fs_iget+0x3440/0x3d10 RSP: ffff8801d90370e8 [ 31.539044] ---[ end trace 8004fd56969de769 ]--- [ 31.543808] Kernel panic - not syncing: Fatal exception [ 31.549768] Dumping ftrace buffer: [ 31.553310] (ftrace buffer empty) [ 31.557001] Kernel Offset: disabled [ 31.560611] Rebooting in 86400 seconds..