[ 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 '10.128.0.237' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.851031][ T6850] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 42.858936][ T6850] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 42.869072][ T6850] F2FS-fs (loop0): invalid crc_offset: 0 [ 42.897259][ T6850] F2FS-fs (loop0): access invalid blkaddr:1 [ 42.903349][ T6850] ------------[ cut here ]------------ [ 42.909521][ T6850] WARNING: CPU: 1 PID: 6850 at fs/f2fs/checkpoint.c:189 f2fs_is_valid_blkaddr+0xa78/0xf00 [ 42.919879][ T6850] Kernel panic - not syncing: panic_on_warn set ... [ 42.926447][ T6850] CPU: 1 PID: 6850 Comm: syz-executor212 Not tainted 5.9.0-rc7-syzkaller #0 [ 42.935084][ T6850] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.945147][ T6850] Call Trace: [ 42.948410][ T6850] dump_stack+0x1d6/0x29e [ 42.952711][ T6850] panic+0x2c0/0x800 [ 42.956576][ T6850] ? __warn+0x102/0x250 [ 42.960702][ T6850] ? f2fs_is_valid_blkaddr+0xa78/0xf00 [ 42.966130][ T6850] ? f2fs_is_valid_blkaddr+0xa78/0xf00 [ 42.971557][ T6850] __warn+0x227/0x250 [ 42.975509][ T6850] ? f2fs_is_valid_blkaddr+0xa78/0xf00 [ 42.980935][ T6850] report_bug+0x1b1/0x2e0 [ 42.985238][ T6850] handle_bug+0x42/0x80 [ 42.989367][ T6850] exc_invalid_op+0x16/0x40 [ 42.993893][ T6850] asm_exc_invalid_op+0x12/0x20 [ 42.998715][ T6850] RIP: 0010:f2fs_is_valid_blkaddr+0xa78/0xf00 [ 43.004751][ T6850] Code: 48 c7 c6 5c 98 36 89 44 89 f2 31 c0 e8 21 40 fd ff 48 8d bd b8 00 00 00 be 08 00 00 00 e8 10 4c 60 fe f0 80 8d b8 00 00 00 04 <0f> 0b e9 72 fd ff ff e8 dc 97 20 fe 31 db e9 66 fd ff ff e8 d0 97 [ 43.024327][ T6850] RSP: 0018:ffffc90001637660 EFLAGS: 00010206 [ 43.030382][ T6850] RAX: ddd7890c8623a401 RBX: 0000000000000000 RCX: ffffffff83546590 [ 43.038347][ T6850] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8880887500b8 [ 43.046311][ T6850] RBP: ffff888088750000 R08: dffffc0000000000 R09: ffffed10110ea018 [ 43.054275][ T6850] R10: ffffed10110ea018 R11: 0000000000000000 R12: 0000000000000007 [ 43.062245][ T6850] R13: ffff8880a1cd8400 R14: 0000000000000001 R15: dffffc0000000000 [ 43.070231][ T6850] ? f2fs_is_valid_blkaddr+0xa70/0xf00 [ 43.075685][ T6850] f2fs_get_node_info+0x6c6/0x1610 [ 43.080770][ T6850] read_node_page+0x385/0x8d0 [ 43.085426][ T6850] __get_node_page+0x37b/0x16a0 [ 43.090337][ T6850] ? iget_locked+0x77b/0x890 [ 43.094900][ T6850] f2fs_iget+0x4d2/0x4040 [ 43.099208][ T6850] ? f2fs_build_stats+0x7d7/0xda0 [ 43.104201][ T6850] ? f2fs_build_stats+0x7d7/0xda0 [ 43.109197][ T6850] ? __mutex_unlock_slowpath+0x12d/0x590 [ 43.114818][ T6850] ? f2fs_build_stats+0x7d7/0xda0 [ 43.119817][ T6850] f2fs_fill_super+0x6f4c/0x9880 [ 43.124732][ T6850] ? bdev_name+0x298/0x3b0 [ 43.129145][ T6850] mount_bdev+0x24f/0x360 [ 43.133444][ T6850] ? kill_f2fs_super+0x2b0/0x2b0 [ 43.138366][ T6850] legacy_get_tree+0xea/0x180 [ 43.143009][ T6850] ? trace_raw_output_f2fs_fiemap+0x210/0x210 [ 43.149044][ T6850] vfs_get_tree+0x88/0x270 [ 43.153432][ T6850] path_mount+0x179d/0x29e0 [ 43.157909][ T6850] __se_sys_mount+0x126/0x180 [ 43.162573][ T6850] do_syscall_64+0x31/0x70 [ 43.166959][ T6850] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 43.172828][ T6850] RIP: 0033:0x44766a [ 43.176693][ T6850] 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 [ 43.196268][ T6850] RSP: 002b:00007fffedc4e3e8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 43.204678][ T6850] RAX: ffffffffffffffda RBX: 00007fffedc4e440 RCX: 000000000044766a [ 43.212620][ T6850] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffedc4e400 [ 43.220561][ T6850] RBP: 00007fffedc4e400 R08: 00007fffedc4e440 R09: 00007fff00000015 [ 43.228502][ T6850] R10: 0000000000000000 R11: 0000000000000297 R12: 000000000000002f [ 43.236455][ T6850] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 43.245598][ T6850] Kernel Offset: disabled [ 43.249959][ T6850] Rebooting in 86400 seconds..