[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.509743] audit: type=1400 audit(1601216182.163:8): avc: denied { execmem } for pid=6358 comm="syz-executor105" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 32.520290] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 32.539241] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 32.551369] F2FS-fs (loop0): invalid crc value [ 32.587112] F2FS-fs (loop0): access invalid blkaddr:1 [ 32.592420] ------------[ cut here ]------------ [ 32.597175] WARNING: CPU: 0 PID: 6358 at fs/f2fs/checkpoint.c:150 f2fs_is_valid_blkaddr+0x2d9/0x920 [ 32.606328] Kernel panic - not syncing: panic_on_warn set ... [ 32.606328] [ 32.613660] CPU: 0 PID: 6358 Comm: syz-executor105 Not tainted 4.14.198-syzkaller #0 [ 32.621523] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.630850] Call Trace: [ 32.633412] dump_stack+0x1b2/0x283 [ 32.637016] panic+0x1f9/0x42d [ 32.640184] ? add_taint.cold+0x16/0x16 [ 32.644133] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 32.648864] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 32.653589] __warn.cold+0x20/0x4b [ 32.657103] ? ist_end_non_atomic+0x10/0x10 [ 32.661433] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 32.666163] report_bug+0x208/0x249 [ 32.669796] do_error_trap+0x195/0x2d0 [ 32.673657] ? math_error+0x2d0/0x2d0 [ 32.677431] ? log_store.cold+0x16/0x16 [ 32.681379] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 32.686368] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 32.691444] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.696260] invalid_op+0x1b/0x40 [ 32.699697] RIP: 0010:f2fs_is_valid_blkaddr+0x2d9/0x920 [ 32.705031] RSP: 0018:ffff888086607820 EFLAGS: 00010286 [ 32.710366] RAX: dffffc0000000000 RBX: ffff888096c56b80 RCX: 0000000000000000 [ 32.717610] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1010cc0ede [ 32.724850] RBP: 0000000000000005 R08: 0000000000000029 R09: 0000000000000000 [ 32.732102] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 32.739344] R13: 0000000000000001 R14: 0000000000001400 R15: 0000000000000400 [ 32.746597] f2fs_submit_page_bio+0x10a/0x1380 [ 32.751152] ? check_preemption_disabled+0x35/0x240 [ 32.756143] read_node_page+0x209/0x2f0 [ 32.760090] ? truncate_node+0xc80/0xc80 [ 32.764128] __get_node_page.part.0+0x97/0xea0 [ 32.768684] get_node_page+0xdd/0x170 [ 32.772457] f2fs_iget+0x1e8/0x3760 [ 32.776060] ? kmem_cache_alloc_trace+0x36c/0x3d0 [ 32.780875] f2fs_fill_super+0x30ac/0x56a0 [ 32.785103] ? snprintf+0xa5/0xd0 [ 32.788539] ? f2fs_commit_super+0x3a0/0x3a0 [ 32.792918] ? ns_test_super+0x50/0x50 [ 32.796780] ? set_blocksize+0x125/0x380 [ 32.800814] mount_bdev+0x2b3/0x360 [ 32.804417] ? f2fs_commit_super+0x3a0/0x3a0 [ 32.808801] mount_fs+0x92/0x2a0 [ 32.812144] vfs_kern_mount.part.0+0x5b/0x470 [ 32.816623] do_mount+0xe53/0x2a00 [ 32.820137] ? do_raw_spin_unlock+0x164/0x220 [ 32.824605] ? copy_mount_string+0x40/0x40 [ 32.828824] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 32.833812] ? copy_mnt_ns+0xa30/0xa30 [ 32.837672] ? copy_mount_options+0x1fa/0x2f0 [ 32.842138] ? copy_mnt_ns+0xa30/0xa30 [ 32.845998] SyS_mount+0xa8/0x120 [ 32.849424] ? copy_mnt_ns+0xa30/0xa30 [ 32.853284] do_syscall_64+0x1d5/0x640 [ 32.857147] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 32.862308] RIP: 0033:0x44714a [ 32.865470] RSP: 002b:00007ffd0e8be458 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 32.873149] RAX: ffffffffffffffda RBX: 00007ffd0e8be4b0 RCX: 000000000044714a [ 32.880391] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd0e8be470 [ 32.887636] RBP: 00007ffd0e8be470 R08: 00007ffd0e8be4b0 R09: 00007ffd00000015 [ 32.894888] R10: 0000000000000000 R11: 0000000000000297 R12: 000000000000000f [ 32.902139] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 32.910686] Kernel Offset: disabled [ 32.914335] Rebooting in 86400 seconds..