Starting System Logging Service... Starting OpenBSD Secure Shell server... Starting Permit User Sessions... Starting getty on tty2-tty6 if dbus and logind are not available... [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started Getty on tty6. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ 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 Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.515322][ T26] audit: type=1400 audit(1601634252.034:8): avc: denied { execmem } for pid=6861 comm="syz-executor315" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 74.545188][ T6861] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 74.553229][ T6861] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 74.564728][ T6861] F2FS-fs (loop0): invalid crc_offset: 0 [ 74.579117][ T6861] F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix. [ 74.588127][ T6861] F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. [ 74.615085][ T6861] F2FS-fs (loop0): access invalid blkaddr:1030372864 [ 74.621986][ T6861] ------------[ cut here ]------------ [ 74.628824][ T6861] WARNING: CPU: 0 PID: 6861 at fs/f2fs/checkpoint.c:189 f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 74.639379][ T6861] Kernel panic - not syncing: panic_on_warn set ... [ 74.645960][ T6861] CPU: 0 PID: 6861 Comm: syz-executor315 Not tainted 5.9.0-rc7-syzkaller #0 [ 74.654629][ T6861] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.664671][ T6861] Call Trace: [ 74.667953][ T6861] dump_stack+0x198/0x1fd [ 74.672269][ T6861] panic+0x382/0x7fb [ 74.676154][ T6861] ? __warn_printk+0xf3/0xf3 [ 74.680725][ T6861] ? printk+0xba/0xed [ 74.684713][ T6861] ? log_store.cold+0x16/0x16 [ 74.689402][ T6861] ? printk+0xba/0xed [ 74.693377][ T6861] ? __warn.cold+0x5/0x4b [ 74.697685][ T6861] ? __warn+0xd6/0x1f2 [ 74.701745][ T6861] ? f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 74.707193][ T6861] __warn.cold+0x20/0x4b [ 74.711415][ T6861] ? f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 74.716864][ T6861] report_bug+0x1bd/0x210 [ 74.721181][ T6861] handle_bug+0x38/0x90 [ 74.725337][ T6861] exc_invalid_op+0x14/0x40 [ 74.729834][ T6861] asm_exc_invalid_op+0x12/0x20 [ 74.734677][ T6861] RIP: 0010:f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 74.740738][ T6861] Code: 89 e2 48 89 df 48 c7 c6 e0 90 cd 88 e8 e7 fa fe ff 48 8d bb b8 00 00 00 be 08 00 00 00 e8 76 06 5e fe f0 80 8b b8 00 00 00 04 <0f> 0b e9 af f7 ff ff e8 02 34 5e fe e9 a5 fa ff ff e8 08 34 5e fe [ 74.760345][ T6861] RSP: 0018:ffffc90000f77738 EFLAGS: 00010206 [ 74.766404][ T6861] RAX: 0000000000000001 RBX: ffff8880937dc000 RCX: ffffffff8358e03a [ 74.774363][ T6861] RDX: ffffed10126fb818 RSI: 0000000000000008 RDI: ffff8880937dc0b8 [ 74.782325][ T6861] RBP: 0000000000000007 R08: 0000000000000001 R09: ffff8880937dc0bf [ 74.790303][ T6861] R10: ffffed10126fb817 R11: 0000000000000000 R12: 000000003d6a3e00 [ 74.798273][ T6861] R13: ffff88809ea11400 R14: 0000000000004000 R15: 0000000000000200 [ 74.806235][ T6861] ? f2fs_is_valid_blkaddr+0xdaa/0xf80 [ 74.811676][ T6861] ? f2fs_is_valid_blkaddr+0xdaa/0xf80 [ 74.817123][ T6861] f2fs_get_node_info+0x4b4/0xbc0 [ 74.822172][ T6861] ? lru_cache_add+0x594/0xb40 [ 74.826932][ T6861] ? f2fs_try_to_free_nats+0x330/0x330 [ 74.832396][ T6861] ? lock_downgrade+0x7ad/0x830 [ 74.837229][ T6861] ? find_get_pages_range_tag+0xd40/0xd40 [ 74.842939][ T6861] read_node_page+0x4a6/0x9b0 [ 74.847605][ T6861] ? truncate_node+0x8d0/0x8d0 [ 74.852364][ T6861] ? lru_cache_add+0x5ca/0xb40 [ 74.857129][ T6861] ? pagecache_get_page+0x22b/0xf70 [ 74.862311][ T6861] __get_node_page.part.0+0xa2/0xac0 [ 74.867588][ T6861] f2fs_get_node_page+0x109/0x180 [ 74.872593][ T6861] f2fs_iget+0x233/0x4b10 [ 74.876905][ T6861] ? __mutex_unlock_slowpath+0xe2/0x610 [ 74.882428][ T6861] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 74.887964][ T6861] ? wait_for_completion+0x260/0x260 [ 74.893265][ T6861] f2fs_fill_super+0x3ae8/0x6e80 [ 74.898317][ T6861] ? f2fs_commit_super+0x840/0x840 [ 74.903410][ T6861] ? set_blocksize+0x1c1/0x400 [ 74.908154][ T6861] mount_bdev+0x32e/0x3f0 [ 74.912472][ T6861] ? f2fs_commit_super+0x840/0x840 [ 74.917559][ T6861] ? __bpf_trace_f2fs_fiemap+0x1b0/0x1b0 [ 74.923167][ T6861] legacy_get_tree+0x105/0x220 [ 74.927912][ T6861] vfs_get_tree+0x89/0x2f0 [ 74.932307][ T6861] path_mount+0x1387/0x20a0 [ 74.936801][ T6861] ? strncpy_from_user+0x2bf/0x3e0 [ 74.941952][ T6861] ? copy_mount_string+0x40/0x40 [ 74.946878][ T6861] ? getname_flags.part.0+0x1dd/0x4f0 [ 74.952232][ T6861] __x64_sys_mount+0x27f/0x300 [ 74.956976][ T6861] ? copy_mnt_ns+0xa60/0xa60 [ 74.961557][ T6861] ? check_preemption_disabled+0x50/0x130 [ 74.967254][ T6861] ? syscall_enter_from_user_mode+0x1d/0x60 [ 74.973125][ T6861] do_syscall_64+0x2d/0x70 [ 74.977543][ T6861] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.983413][ T6861] RIP: 0033:0x44708a [ 74.987287][ T6861] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 75.006882][ T6861] RSP: 002b:00007ffe19af1d28 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 75.015272][ T6861] RAX: ffffffffffffffda RBX: 00007ffe19af1d80 RCX: 000000000044708a [ 75.023319][ T6861] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe19af1d40 [ 75.031271][ T6861] RBP: 00007ffe19af1d40 R08: 00007ffe19af1d80 R09: 00007ffe00000015 [ 75.039236][ T6861] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000009 [ 75.047187][ T6861] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 75.055933][ T6861] Kernel Offset: disabled [ 75.060325][ T6861] Rebooting in 86400 seconds..