[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.907798] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 34.915086] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 34.923870] F2FS-fs (loop0): Fix alignment : done, start(4096) end(147456) block(12288) [ 34.934407] F2FS-fs (loop0): invalid crc value [ 34.939544] F2FS-fs (loop0): Ignore s_resuid=60928, s_resgid=0 w/o reserve_root [ 34.949679] attempt to access beyond end of device [ 34.955277] loop0: rw=12288, want=12296, limit=8287 [ 34.960351] attempt to access beyond end of device [ 34.965995] loop0: rw=12288, want=12296, limit=8287 [ 34.971123] attempt to access beyond end of device [ 34.976171] loop0: rw=12288, want=12296, limit=8287 [ 34.981216] attempt to access beyond end of device [ 34.986259] loop0: rw=12288, want=12296, limit=8287 [ 34.991320] attempt to access beyond end of device [ 34.996459] loop0: rw=12288, want=12296, limit=8287 [ 35.001507] attempt to access beyond end of device [ 35.006540] loop0: rw=12288, want=12296, limit=8287 [ 35.011603] attempt to access beyond end of device [ 35.016857] loop0: rw=12288, want=12296, limit=8287 [ 35.021913] attempt to access beyond end of device [ 35.026900] loop0: rw=12288, want=12296, limit=8287 [ 35.031943] attempt to access beyond end of device [ 35.036961] loop0: rw=12288, want=12296, limit=8287 [ 35.042136] attempt to access beyond end of device [ 35.047221] loop0: rw=12288, want=12296, limit=8287 [ 35.052711] ------------[ cut here ]------------ [ 35.057461] kernel BUG at fs/f2fs/checkpoint.c:127! [ 35.062732] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 35.068187] CPU: 0 PID: 8105 Comm: syz-executor529 Not tainted 4.19.155-syzkaller #0 [ 35.076783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.086146] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 35.091860] 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 [ 35.110756] RSP: 0018:ffff8880b14a7880 EFLAGS: 00010293 [ 35.116116] RAX: ffff888097060380 RBX: ffff8880b3a06640 RCX: ffffffff832031c1 [ 35.123384] RDX: 0000000000000000 RSI: ffffffff831daaad RDI: 0000000000000005 [ 35.130635] RBP: ffff8880b0574d80 R08: ffffffff8cd33650 R09: 0000000000000001 [ 35.137893] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000286 [ 35.145232] R13: ffff8880b0575278 R14: 0000000000000080 R15: dffffc0000000000 [ 35.152487] FS: 0000000000c3b880(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 35.160694] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.166558] CR2: 00007ffc5f29cff8 CR3: 00000000b28ca000 CR4: 00000000001406f0 [ 35.173817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.181949] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.189230] Call Trace: [ 35.191809] f2fs_build_segment_manager+0x5ea5/0xac60 [ 35.196994] ? f2fs_flush_sit_entries+0x3370/0x3370 [ 35.202345] ? map_id_range_down+0x1c4/0x340 [ 35.206739] ? __lockdep_init_map+0x100/0x5a0 [ 35.211220] ? __lockdep_init_map+0x100/0x5a0 [ 35.215704] f2fs_fill_super+0x31d9/0x7050 [ 35.223950] ? snprintf+0xbb/0xf0 [ 35.227415] ? f2fs_commit_super+0x400/0x400 [ 35.231808] ? wait_for_completion_io+0x10/0x10 [ 35.236460] ? set_blocksize+0x163/0x3f0 [ 35.240512] mount_bdev+0x2fc/0x3b0 [ 35.244127] ? f2fs_commit_super+0x400/0x400 [ 35.248539] mount_fs+0xa3/0x30c [ 35.251891] vfs_kern_mount.part.0+0x68/0x470 [ 35.256372] do_mount+0x113c/0x2f10 [ 35.259982] ? lock_acquire+0x170/0x3c0 [ 35.263944] ? check_preemption_disabled+0x41/0x280 [ 35.268948] ? copy_mount_string+0x40/0x40 [ 35.273171] ? copy_mount_options+0x59/0x380 [ 35.277587] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 35.282591] ? kmem_cache_alloc_trace+0x323/0x380 [ 35.287423] ? copy_mount_options+0x26f/0x380 [ 35.291905] ksys_mount+0xcf/0x130 [ 35.295447] __x64_sys_mount+0xba/0x150 [ 35.299407] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 35.303982] do_syscall_64+0xf9/0x620 [ 35.307768] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.312940] RIP: 0033:0x447dca [ 35.316133] 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 [ 35.335107] RSP: 002b:00007ffea91f8768 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 35.342798] RAX: ffffffffffffffda RBX: 00007ffea91f87c0 RCX: 0000000000447dca [ 35.350067] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffea91f8780 [ 35.357320] RBP: 00007ffea91f8780 R08: 00007ffea91f87c0 R09: 0000000000000000 [ 35.364574] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000005 [ 35.371826] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 35.379083] Modules linked in: [ 35.382757] ---[ end trace 6decdb5d347bc18f ]--- [ 35.387569] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 35.393288] 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 [ 35.412238] RSP: 0018:ffff8880b14a7880 EFLAGS: 00010293 [ 35.417657] RAX: ffff888097060380 RBX: ffff8880b3a06640 RCX: ffffffff832031c1 [ 35.425070] RDX: 0000000000000000 RSI: ffffffff831daaad RDI: 0000000000000005 [ 35.432339] RBP: ffff8880b0574d80 R08: ffffffff8cd33650 R09: 0000000000000001 [ 35.439664] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000286 [ 35.447061] R13: ffff8880b0575278 R14: 0000000000000080 R15: dffffc0000000000 [ 35.455066] FS: 0000000000c3b880(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 35.463297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.469207] CR2: 00007ffc5f29cff8 CR3: 00000000b28ca000 CR4: 00000000001406f0 [ 35.478709] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.486094] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.493381] Kernel panic - not syncing: Fatal exception [ 35.499411] Kernel Offset: disabled [ 35.503033] Rebooting in 86400 seconds..