[ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Found device /dev/ttyS0. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.84' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.864075] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 31.871485] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 31.880735] F2FS-fs (loop0): invalid crc value [ 31.892161] attempt to access beyond end of device [ 31.897120] loop0: rw=12288, want=24584, limit=16479 [ 31.902888] attempt to access beyond end of device [ 31.908198] loop0: rw=12288, want=24592, limit=16479 [ 31.913309] attempt to access beyond end of device [ 31.918810] loop0: rw=12288, want=24600, limit=16479 [ 31.923921] attempt to access beyond end of device [ 31.929702] loop0: rw=12288, want=24608, limit=16479 [ 31.934814] attempt to access beyond end of device [ 31.940323] loop0: rw=12288, want=24616, limit=16479 [ 31.945433] attempt to access beyond end of device [ 31.950984] loop0: rw=12288, want=24624, limit=16479 [ 31.956095] attempt to access beyond end of device [ 31.961601] loop0: rw=12288, want=24632, limit=16479 [ 31.966710] attempt to access beyond end of device [ 31.972832] loop0: rw=12288, want=24640, limit=16479 [ 31.978390] attempt to access beyond end of device [ 31.983349] loop0: rw=12288, want=24584, limit=16479 [ 31.989089] attempt to access beyond end of device [ 31.994002] loop0: rw=12288, want=24584, limit=16479 [ 31.999742] attempt to access beyond end of device [ 32.004656] loop0: rw=12288, want=24584, limit=16479 [ 32.010386] attempt to access beyond end of device [ 32.015298] loop0: rw=12288, want=24584, limit=16479 [ 32.021016] attempt to access beyond end of device [ 32.025928] loop0: rw=12288, want=24584, limit=16479 [ 32.031652] attempt to access beyond end of device [ 32.036563] loop0: rw=12288, want=24584, limit=16479 [ 32.042309] attempt to access beyond end of device [ 32.047671] loop0: rw=12288, want=24584, limit=16479 [ 32.052776] attempt to access beyond end of device [ 32.058277] loop0: rw=12288, want=24584, limit=16479 [ 32.063381] attempt to access beyond end of device [ 32.068919] loop0: rw=12288, want=24584, limit=16479 [ 32.074294] ------------[ cut here ]------------ [ 32.079027] kernel BUG at fs/f2fs/checkpoint.c:127! [ 32.084866] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 32.090300] CPU: 1 PID: 8111 Comm: syz-executor107 Not tainted 4.19.211-syzkaller #0 [ 32.098153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.107492] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 32.113177] 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 3b d2 03 05 48 89 ef e8 f3 a7 02 00 <0f> 0b e8 1c e4 82 fe eb 80 be 04 00 00 00 e8 00 e8 82 fe eb d1 66 [ 32.132051] RSP: 0018:ffff88808ae3f8d0 EFLAGS: 00010293 [ 32.137390] RAX: ffff8880b3dc82c0 RBX: ffff8880951741c0 RCX: ffffffff831805c1 [ 32.144637] RDX: 0000000000000000 RSI: ffffffff83157e3d RDI: 0000000000000005 [ 32.151893] RBP: ffff88809226de00 R08: ffffffff8cd2d580 R09: 0000000000000001 [ 32.159143] R10: 0000000000000005 R11: 0000000000074071 R12: 0000000000000286 [ 32.166391] R13: ffff88809226e2f8 R14: 0000000000000000 R15: ffff88809226de00 [ 32.173640] FS: 0000555555aaa300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 32.181844] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.187704] CR2: 00007f85394e6000 CR3: 00000000aa502000 CR4: 00000000003406e0 [ 32.194957] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.202202] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.210162] Call Trace: [ 32.212731] __f2fs_build_free_nids+0x338/0x1020 [ 32.217463] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 32.222459] f2fs_build_node_manager+0x24c5/0x31d0 [ 32.227370] f2fs_fill_super+0x31fd/0x7050 [ 32.231587] ? snprintf+0xbb/0xf0 [ 32.235113] ? f2fs_commit_super+0x400/0x400 [ 32.239511] ? wait_for_completion_io+0x10/0x10 [ 32.244162] ? set_blocksize+0x163/0x3f0 [ 32.248207] mount_bdev+0x2fc/0x3b0 [ 32.251816] ? f2fs_commit_super+0x400/0x400 [ 32.256198] mount_fs+0xa3/0x310 [ 32.259550] vfs_kern_mount.part.0+0x68/0x470 [ 32.264030] do_mount+0x115c/0x2f50 [ 32.267639] ? cmp_ex_sort+0xc0/0xc0 [ 32.271332] ? __do_page_fault+0x180/0xd60 [ 32.275542] ? copy_mount_string+0x40/0x40 [ 32.279758] ? copy_mount_options+0x1cd/0x380 [ 32.284231] ? memset+0x20/0x40 [ 32.287495] ? copy_mount_options+0x26f/0x380 [ 32.291969] ksys_mount+0xcf/0x130 [ 32.295484] __x64_sys_mount+0xba/0x150 [ 32.299441] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 32.304000] do_syscall_64+0xf9/0x620 [ 32.307780] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.312947] RIP: 0033:0x7ffb9152246a [ 32.316637] Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 32.335511] RSP: 002b:00007fff623a2468 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 32.343199] RAX: ffffffffffffffda RBX: 00007fff623a24c0 RCX: 00007ffb9152246a [ 32.350455] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff623a2480 [ 32.357705] RBP: 00007fff623a2480 R08: 00007fff623a24c0 R09: 0000000000000000 [ 32.364956] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200002d8 [ 32.372201] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000009 [ 32.379448] Modules linked in: [ 32.386940] ---[ end trace 806cf4932ba1ad67 ]--- [ 32.386958] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 32.386973] 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 3b d2 03 05 48 89 ef e8 f3 a7 02 00 <0f> 0b e8 1c e4 82 fe eb 80 be 04 00 00 00 e8 00 e8 82 fe eb d1 66 [ 32.416337] RSP: 0018:ffff88808ae3f8d0 EFLAGS: 00010293 [ 32.421714] RAX: ffff8880b3dc82c0 RBX: ffff8880951741c0 RCX: ffffffff831805c1 [ 32.429011] RDX: 0000000000000000 RSI: ffffffff83157e3d RDI: 0000000000000005 [ 32.436260] RBP: ffff88809226de00 R08: ffffffff8cd2d580 R09: 0000000000000001 [ 32.443540] R10: 0000000000000005 R11: 0000000000074071 R12: 0000000000000286 [ 32.450838] R13: ffff88809226e2f8 R14: 0000000000000000 R15: ffff88809226de00 [ 32.458174] FS: 0000555555aaa300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 32.466394] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.472291] CR2: 00007f809803b0a8 CR3: 00000000aa502000 CR4: 00000000003406f0 [ 32.479598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.486884] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.494145] Kernel panic - not syncing: Fatal exception [ 32.499638] Kernel Offset: disabled [ 32.503243] Rebooting in 86400 seconds..