[ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.106' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.517061] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 27.524354] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 27.532779] F2FS-fs (loop0): invalid crc value [ 27.562612] F2FS-fs (loop0): access invalid blkaddr:5578753 [ 27.568411] ------------[ cut here ]------------ [ 27.573148] WARNING: CPU: 0 PID: 7984 at fs/f2fs/checkpoint.c:150 f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.582303] Kernel panic - not syncing: panic_on_warn set ... [ 27.582303] [ 27.589641] CPU: 0 PID: 7984 Comm: syz-executor356 Not tainted 4.14.280-syzkaller #0 [ 27.597495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.606824] Call Trace: [ 27.609390] dump_stack+0x1b2/0x281 [ 27.612994] panic+0x1f9/0x42d [ 27.616162] ? add_taint.cold+0x16/0x16 [ 27.620116] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.624849] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.629579] __warn.cold+0x20/0x44 [ 27.633096] ? ist_end_non_atomic+0x10/0x10 [ 27.637394] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.642132] report_bug+0x208/0x250 [ 27.645736] do_error_trap+0x195/0x2d0 [ 27.649600] ? math_error+0x2d0/0x2d0 [ 27.653378] ? log_store.cold+0x16/0x16 [ 27.657331] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 27.662321] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 27.667403] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.672219] invalid_op+0x1b/0x40 [ 27.675653] RIP: 0010:f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.680987] RSP: 0018:ffff8880b34df820 EFLAGS: 00010286 [ 27.686327] RAX: dffffc0000000000 RBX: ffff888095fb0540 RCX: 0000000000000000 [ 27.693570] RDX: 0000000000000000 RSI: ffffffff878bc600 RDI: ffffed101669bede [ 27.700812] RBP: 0000000000000005 R08: 000000000000002f R09: 0000000000000000 [ 27.708059] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000552001 [ 27.715311] R13: ffff8880a95ca540 R14: 0000000000000009 R15: 0000000000000400 [ 27.722577] f2fs_submit_page_bio+0x10a/0x1380 [ 27.727139] ? check_preemption_disabled+0x35/0x240 [ 27.732150] read_node_page+0x209/0x2f0 [ 27.736109] ? truncate_node+0xc80/0xc80 [ 27.740153] __get_node_page.part.0+0x97/0xea0 [ 27.744713] get_node_page+0xdd/0x170 [ 27.748487] f2fs_iget+0x1e8/0x3760 [ 27.752090] ? kmem_cache_alloc_trace+0x36c/0x3d0 [ 27.756915] f2fs_fill_super+0x30ac/0x56a0 [ 27.761140] ? snprintf+0xa5/0xd0 [ 27.764571] ? f2fs_commit_super+0x3a0/0x3a0 [ 27.768964] ? ns_test_super+0x50/0x50 [ 27.772827] ? set_blocksize+0x125/0x380 [ 27.776863] mount_bdev+0x2b3/0x360 [ 27.780464] ? f2fs_commit_super+0x3a0/0x3a0 [ 27.784980] mount_fs+0x92/0x2a0 [ 27.788327] vfs_kern_mount.part.0+0x5b/0x470 [ 27.792797] do_mount+0xe65/0x2a30 [ 27.796314] ? retint_kernel+0x2d/0x2d [ 27.800175] ? copy_mount_string+0x40/0x40 [ 27.804386] ? memset+0x20/0x40 [ 27.807638] ? copy_mount_options+0x1fa/0x2f0 [ 27.812204] ? copy_mnt_ns+0xa30/0xa30 [ 27.816081] SyS_mount+0xa8/0x120 [ 27.819510] ? copy_mnt_ns+0xa30/0xa30 [ 27.823379] do_syscall_64+0x1d5/0x640 [ 27.827254] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.832421] RIP: 0033:0x7efdd8f1b49a [ 27.836105] RSP: 002b:00007ffe53a35438 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 27.843796] RAX: ffffffffffffffda RBX: 00007ffe53a35490 RCX: 00007efdd8f1b49a [ 27.851048] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe53a35450 [ 27.858294] RBP: 00007ffe53a35450 R08: 00007ffe53a35490 R09: 0000000000000000 [ 27.865543] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200002d8 [ 27.872785] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000009 [ 27.880232] Kernel Offset: disabled [ 27.883882] Rebooting in 86400 seconds..