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 '10.128.0.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.326642] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 26.333686] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 26.341684] F2FS-fs (loop0): invalid crc value [ 26.354929] ------------[ cut here ]------------ [ 26.359771] WARNING: CPU: 1 PID: 3799 at fs/f2fs/node.c:1185 __get_node_page.part.34+0x6bf/0x1030 [ 26.370572] Kernel panic - not syncing: panic_on_warn set ... [ 26.370572] [ 26.377909] CPU: 1 PID: 3799 Comm: syzkaller604446 Not tainted 4.9.95-g13cc540 #2 [ 26.385504] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.394849] ffff8801d929f618 ffffffff81eb0ba9 ffffffff83a484a0 00000000ffffffff [ 26.402848] 0000000000000000 0000000000000001 00000000000004a1 ffff8801d929f6d8 [ 26.410837] ffffffff8141f945 0000000041b58ab3 ffffffff841b7b88 ffffffff8141f786 [ 26.418831] Call Trace: [ 26.421390] [] dump_stack+0xc1/0x128 [ 26.426725] [] panic+0x1bf/0x3bc [ 26.431713] [] ? add_taint.cold.6+0x16/0x16 [ 26.437656] [] ? __warn.cold.9+0xa6/0x17f [ 26.443429] [] ? __get_node_page.part.34+0x6bf/0x1030 [ 26.450239] [] __warn.cold.9+0xc1/0x17f [ 26.455836] [] warn_slowpath_null+0x2c/0x40 [ 26.461776] [] __get_node_page.part.34+0x6bf/0x1030 [ 26.468413] [] ? alloc_nid_failed+0x1c0/0x1c0 [ 26.474541] [] get_node_page.part.35+0x21/0x30 [ 26.480744] [] truncate_xattr_node+0x150/0x230 [ 26.486947] [] ? truncate_inode_blocks+0x1030/0x1030 [ 26.493681] [] remove_inode_page+0x12c/0x620 [ 26.499711] [] ? get_dnode_of_data+0x1e80/0x1e80 [ 26.506175] [] f2fs_evict_inode+0xb1f/0x11e0 [ 26.512211] [] ? evict+0x16a/0x4f0 [ 26.517377] [] ? f2fs_write_inode+0x1e0/0x1e0 [ 26.523495] [] evict+0x22e/0x4f0 [ 26.528485] [] ? f2fs_show_options+0x11d0/0x11d0 [ 26.534861] [] iput+0x371/0x900 [ 26.539762] [] f2fs_fill_super+0x46b8/0x5d00 [ 26.545792] [] ? vsnprintf+0x1a8/0x1840 [ 26.551389] [] ? vsprintf+0x40/0x40 [ 26.556645] [] ? f2fs_commit_super+0x3c0/0x3c0 [ 26.562849] [] ? set_blocksize+0x267/0x300 [ 26.568715] [] ? set_bdev_super+0x150/0x150 [ 26.574665] [] mount_bdev+0x2c7/0x390 [ 26.580095] [] ? f2fs_commit_super+0x3c0/0x3c0 [ 26.586296] [] f2fs_mount+0x34/0x40 [ 26.591544] [] mount_fs+0x28c/0x370 [ 26.596794] [] vfs_kern_mount.part.29+0xd1/0x3d0 [ 26.603173] [] ? ns_capable_common+0x12a/0x150 [ 26.609375] [] do_mount+0x3c9/0x2740 [ 26.614710] [] ? copy_mount_string+0x40/0x40 [ 26.620741] [] ? kasan_unpoison_shadow+0x35/0x50 [ 26.627114] [] ? kasan_kmalloc+0xc7/0xe0 [ 26.632902] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 26.639456] [] ? copy_mount_options+0x5f/0x320 [ 26.645661] [] ? copy_mount_options+0x1e5/0x320 [ 26.651951] [] SyS_mount+0xfe/0x110 [ 26.657200] [] ? copy_mnt_ns+0x8e0/0x8e0 [ 26.662884] [] do_syscall_64+0x1a6/0x490 [ 26.668574] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 26.675974] Dumping ftrace buffer: [ 26.679518] (ftrace buffer empty) [ 26.683202] Kernel Offset: disabled [ 26.686814] Rebooting in 86400 seconds..