INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.627628] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 31.634683] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 31.643104] F2FS-fs (loop0): invalid crc value [ 31.648824] BUG: unable to handle kernel paging request at ffffed005f12edd0 [ 31.656155] IP: [] build_segment_manager+0x6b44/0x9d30 [ 31.663102] PGD 21fffb067 [ 31.665745] PUD 21fff9067 PMD 0 [ 31.669223] [ 31.670842] Oops: 0000 [#1] PREEMPT SMP KASAN [ 31.675309] Dumping ftrace buffer: [ 31.678822] (ftrace buffer empty) [ 31.682508] Modules linked in: [ 31.685791] CPU: 1 PID: 3801 Comm: syzkaller256711 Not tainted 4.9.95-g13cc540 #2 [ 31.693384] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.702716] task: ffff8801b8b03000 task.stack: ffff8801b5700000 [ 31.708746] RIP: 0010:[] [] build_segment_manager+0x6b44/0x9d30 [ 31.718119] RSP: 0018:ffff8801b5707910 EFLAGS: 00010a02 [ 31.723538] RAX: 1ffff1005f12edd0 RBX: ffff8802f8976e80 RCX: 0000000000000000 [ 31.730780] RDX: ffff8801cb0f2b01 RSI: 0000000000000001 RDI: ffff8801cb0f2b80 [ 31.738024] RBP: ffff8801b5707a90 R08: ffffffff853f05d0 R09: 0000000000000001 [ 31.745265] R10: ffff8801b8b03000 R11: ffff8801b5707627 R12: ffff8801cb0f2b3e [ 31.752506] R13: dffffc0000000000 R14: 0000000000000138 R15: ffff8801d7131100 [ 31.759749] FS: 0000000001b36880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 31.767947] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.773799] CR2: ffffed005f12edd0 CR3: 00000001b6bd8000 CR4: 0000000000160670 [ 31.781042] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.788285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.795526] Stack: [ 31.797649] ffff8801b64f92bc ffff8801b64f9340 ffff8801b64f9340 ffff8801cb0f2a00 [ 31.805627] ffff8801b89779d8 ffff880100000007 ffff8801d7131bc0 1ffff1003ae26376 [ 31.813629] ffffed0036c9f268 ffffed0000000000 0000000000000000 ffffea0000000000 [ 31.821602] Call Trace: [ 31.824169] [] ? flush_sit_entries+0x2560/0x2560 [ 31.830554] [] ? __raw_spin_lock_init+0x2d/0x100 [ 31.837533] [] f2fs_fill_super+0x1d10/0x5d00 [ 31.843564] [] ? vsnprintf+0x1a8/0x1840 [ 31.849159] [] ? vsprintf+0x40/0x40 [ 31.854414] [] ? f2fs_commit_super+0x3c0/0x3c0 [ 31.860620] [] ? set_blocksize+0x267/0x300 [ 31.866477] [] ? set_bdev_super+0x150/0x150 [ 31.872419] [] mount_bdev+0x2c7/0x390 [ 31.877841] [] ? f2fs_commit_super+0x3c0/0x3c0 [ 31.884045] [] f2fs_mount+0x34/0x40 [ 31.889292] [] mount_fs+0x28c/0x370 [ 31.894541] [] vfs_kern_mount.part.29+0xd1/0x3d0 [ 31.900927] [] ? ns_capable_common+0x12a/0x150 [ 31.907139] [] do_mount+0x3c9/0x2740 [ 31.912473] [] ? copy_mount_string+0x40/0x40 [ 31.918503] [] ? kasan_unpoison_shadow+0x35/0x50 [ 31.925922] [] ? kasan_kmalloc+0xc7/0xe0 [ 31.931604] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 31.938155] [] ? copy_mount_options+0x5f/0x320 [ 31.944355] [] ? copy_mount_options+0x1e5/0x320 [ 31.950660] [] SyS_mount+0xfe/0x110 [ 31.955915] [] ? copy_mnt_ns+0x8e0/0x8e0 [ 31.961598] [] do_syscall_64+0x1a6/0x490 [ 31.967292] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 31.974193] Code: 48 89 d0 83 e0 07 38 c1 0f 9e c2 84 c9 0f 95 c0 84 c2 0f 85 fe 2a 00 00 49 8b 44 24 42 48 89 85 d0 fe ff ff 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 74 08 3c 03 0f 8e cd 2a 00 00 0f b7 03 66 [ 32.000989] RIP [] build_segment_manager+0x6b44/0x9d30 [ 32.008022] RSP [ 32.011619] CR2: ffffed005f12edd0 [ 32.015047] ---[ end trace d2bcd53476675f19 ]--- [ 32.019771] Kernel panic - not syncing: Fatal exception [ 32.025598] Dumping ftrace buffer: [ 32.029117] (ftrace buffer empty) [ 32.032801] Kernel Offset: disabled [ 32.036400] Rebooting in 86400 seconds..