[ 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 '10.128.10.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.493793] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 37.501385] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 37.512317] F2FS-fs (loop0): invalid crc value [ 37.536498] attempt to access beyond end of device [ 37.542950] loop0: rw=12288, want=20488, limit=16368 [ 37.549328] attempt to access beyond end of device [ 37.554261] loop0: rw=12288, want=20496, limit=16368 [ 37.560152] attempt to access beyond end of device [ 37.565091] loop0: rw=12288, want=20504, limit=16368 [ 37.571333] attempt to access beyond end of device [ 37.576350] loop0: rw=12288, want=20512, limit=16368 [ 37.582254] attempt to access beyond end of device [ 37.587178] loop0: rw=12288, want=20520, limit=16368 [ 37.593024] attempt to access beyond end of device [ 37.598404] loop0: rw=12288, want=20528, limit=16368 [ 37.603528] attempt to access beyond end of device [ 37.609273] loop0: rw=12288, want=20536, limit=16368 [ 37.614412] attempt to access beyond end of device [ 37.620094] loop0: rw=12288, want=20544, limit=16368 [ 37.625331] attempt to access beyond end of device [ 37.631108] loop0: rw=12288, want=20488, limit=16368 [ 37.636232] attempt to access beyond end of device [ 37.641959] loop0: rw=12288, want=20488, limit=16368 [ 37.647096] attempt to access beyond end of device [ 37.652837] loop0: rw=12288, want=20488, limit=16368 [ 37.658910] attempt to access beyond end of device [ 37.663850] loop0: rw=12288, want=20488, limit=16368 [ 37.669859] attempt to access beyond end of device [ 37.674829] loop0: rw=12288, want=20488, limit=16368 [ 37.680756] attempt to access beyond end of device [ 37.685807] loop0: rw=12288, want=20488, limit=16368 [ 37.692355] attempt to access beyond end of device [ 37.697499] loop0: rw=12288, want=20488, limit=16368 [ 37.704172] attempt to access beyond end of device [ 37.709762] loop0: rw=12288, want=20488, limit=16368 [ 37.714904] attempt to access beyond end of device [ 37.720651] loop0: rw=12288, want=20488, limit=16368 [ 37.726100] ------------[ cut here ]------------ [ 37.730860] kernel BUG at fs/f2fs/checkpoint.c:127! [ 37.736869] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 37.742249] CPU: 0 PID: 8120 Comm: syz-executor031 Not tainted 4.19.155-syzkaller #0 [ 37.750107] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.759472] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 37.765874] Code: e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 75 23 83 8b 84 00 00 00 08 4c 89 e6 4c 89 ef e8 eb db f7 04 48 89 ef e8 83 a7 02 00 <0f> 0b e8 1c 4d 7d fe eb 80 be 04 00 00 00 e8 00 51 7d fe eb d1 0f [ 37.784772] RSP: 0018:ffff8880905b78d0 EFLAGS: 00010293 [ 37.790124] RAX: ffff888094de0180 RBX: ffff8880aff04cc0 RCX: ffffffff832031c1 [ 37.797391] RDX: 0000000000000000 RSI: ffffffff831daaad RDI: 0000000000000005 [ 37.804654] RBP: ffff888093f91080 R08: ffffffff8cd187d8 R09: 0000000000000001 [ 37.811903] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000286 [ 37.819156] R13: ffff888093f91578 R14: 0000000000000000 R15: ffff888093f91080 [ 37.826406] FS: 00000000024a4880(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 37.834609] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.840484] CR2: 00007f52a6aee000 CR3: 000000009df3a000 CR4: 00000000001406f0 [ 37.847734] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.854997] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.862259] Call Trace: [ 37.864855] __f2fs_build_free_nids+0x338/0x1020 [ 37.869596] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 37.874598] f2fs_build_node_manager+0x24c5/0x31d0 [ 37.879516] f2fs_fill_super+0x31fd/0x7050 [ 37.883757] ? snprintf+0xbb/0xf0 [ 37.887199] ? f2fs_commit_super+0x400/0x400 [ 37.891593] ? wait_for_completion_io+0x10/0x10 [ 37.896242] ? set_blocksize+0x163/0x3f0 [ 37.900303] mount_bdev+0x2fc/0x3b0 [ 37.904009] ? f2fs_commit_super+0x400/0x400 [ 37.908401] mount_fs+0xa3/0x30c [ 37.911766] vfs_kern_mount.part.0+0x68/0x470 [ 37.916260] do_mount+0x113c/0x2f10 [ 37.919892] ? copy_mount_string+0x40/0x40 [ 37.924144] ? copy_mount_options+0x1cd/0x380 [ 37.928632] ? copy_mount_options+0x1da/0x380 [ 37.933112] ? copy_mount_options+0x1e0/0x380 [ 37.937596] ? copy_mount_options+0x26f/0x380 [ 37.942096] ksys_mount+0xcf/0x130 [ 37.945618] __x64_sys_mount+0xba/0x150 [ 37.949573] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 37.954138] do_syscall_64+0xf9/0x620 [ 37.957927] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.963551] RIP: 0033:0x447e0a [ 37.966727] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d a3 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 5a a3 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 37.995421] RSP: 002b:00007ffc939f09d8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 38.003244] RAX: ffffffffffffffda RBX: 00007ffc939f0a30 RCX: 0000000000447e0a [ 38.010518] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc939f09f0 [ 38.017780] RBP: 00007ffc939f09f0 R08: 00007ffc939f0a30 R09: 0000000000000000 [ 38.025041] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000008 [ 38.032298] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 38.039552] Modules linked in: [ 38.048012] ---[ end trace 444fc2baf02348a8 ]--- [ 38.052845] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 38.058701] Code: e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 75 23 83 8b 84 00 00 00 08 4c 89 e6 4c 89 ef e8 eb db f7 04 48 89 ef e8 83 a7 02 00 <0f> 0b e8 1c 4d 7d fe eb 80 be 04 00 00 00 e8 00 51 7d fe eb d1 0f [ 38.077674] RSP: 0018:ffff8880905b78d0 EFLAGS: 00010293 [ 38.083048] RAX: ffff888094de0180 RBX: ffff8880aff04cc0 RCX: ffffffff832031c1 [ 38.090372] RDX: 0000000000000000 RSI: ffffffff831daaad RDI: 0000000000000005 [ 38.097711] RBP: ffff888093f91080 R08: ffffffff8cd187d8 R09: 0000000000000001 [ 38.104987] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000286 [ 38.115837] R13: ffff888093f91578 R14: 0000000000000000 R15: ffff888093f91080 [ 38.123394] FS: 00000000024a4880(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 38.131675] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.137627] CR2: 00007efe0c03c028 CR3: 000000009df3a000 CR4: 00000000001406e0 [ 38.146423] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.154071] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.161750] Kernel panic - not syncing: Fatal exception [ 38.168089] Kernel Offset: disabled [ 38.171738] Rebooting in 86400 seconds..