[ 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 '10.128.0.227' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.884834] audit: type=1400 audit(1600869779.819:8): avc: denied { execmem } for pid=6334 comm="syz-executor969" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 34.891196] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 34.918300] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 34.928852] F2FS-fs (loop0): invalid crc value [ 34.964090] F2FS-fs (loop0): access invalid blkaddr:1 [ 34.969493] ------------[ cut here ]------------ [ 34.974248] WARNING: CPU: 1 PID: 6334 at fs/f2fs/checkpoint.c:150 f2fs_is_valid_blkaddr+0x2d9/0x920 [ 34.983439] Kernel panic - not syncing: panic_on_warn set ... [ 34.983439] [ 34.990801] CPU: 1 PID: 6334 Comm: syz-executor969 Not tainted 4.14.198-syzkaller #0 [ 34.998661] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.008006] Call Trace: [ 35.010591] dump_stack+0x1b2/0x283 [ 35.014202] panic+0x1f9/0x42d [ 35.017386] ? add_taint.cold+0x16/0x16 [ 35.021349] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 35.026191] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 35.030949] __warn.cold+0x20/0x4b [ 35.034477] ? ist_end_non_atomic+0x10/0x10 [ 35.038777] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 35.043517] report_bug+0x208/0x249 [ 35.047130] do_error_trap+0x195/0x2d0 [ 35.051103] ? math_error+0x2d0/0x2d0 [ 35.054909] ? log_store.cold+0x16/0x16 [ 35.058886] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 35.063953] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 35.069062] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.073901] invalid_op+0x1b/0x40 [ 35.077339] RIP: 0010:f2fs_is_valid_blkaddr+0x2d9/0x920 [ 35.082695] RSP: 0018:ffff88808c747820 EFLAGS: 00010286 [ 35.088066] RAX: dffffc0000000000 RBX: ffff8880917b4880 RCX: 0000000000000000 [ 35.095328] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed10118e8ede [ 35.102594] RBP: 0000000000000005 R08: 0000000000000029 R09: 0000000000000000 [ 35.109849] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 35.117110] R13: 0000000000000001 R14: 0000000000001400 R15: 0000000000000400 [ 35.125266] f2fs_submit_page_bio+0x10a/0x1380 [ 35.129840] ? check_preemption_disabled+0x35/0x240 [ 35.134840] read_node_page+0x209/0x2f0 [ 35.138798] ? truncate_node+0xc80/0xc80 [ 35.142857] __get_node_page.part.0+0x97/0xea0 [ 35.147422] get_node_page+0xdd/0x170 [ 35.151202] f2fs_iget+0x1e8/0x3760 [ 35.154827] ? kmem_cache_alloc_trace+0x36c/0x3d0 [ 35.159717] f2fs_fill_super+0x30ac/0x56a0 [ 35.163991] ? snprintf+0xa5/0xd0 [ 35.167428] ? f2fs_commit_super+0x3a0/0x3a0 [ 35.171815] ? ns_test_super+0x50/0x50 [ 35.175688] ? set_blocksize+0x125/0x380 [ 35.179740] mount_bdev+0x2b3/0x360 [ 35.183380] ? f2fs_commit_super+0x3a0/0x3a0 [ 35.187792] mount_fs+0x92/0x2a0 [ 35.191224] vfs_kern_mount.part.0+0x5b/0x470 [ 35.195696] do_mount+0xe53/0x2a00 [ 35.199245] ? retint_kernel+0x2d/0x2d [ 35.203126] ? copy_mount_string+0x40/0x40 [ 35.207350] ? memset+0x20/0x40 [ 35.210613] ? copy_mount_options+0x1fa/0x2f0 [ 35.215105] ? copy_mnt_ns+0xa30/0xa30 [ 35.218981] SyS_mount+0xa8/0x120 [ 35.222409] ? copy_mnt_ns+0xa30/0xa30 [ 35.226309] do_syscall_64+0x1d5/0x640 [ 35.230179] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.235607] RIP: 0033:0x44766a [ 35.238787] RSP: 002b:00007ffcbe3f81c8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 35.246490] RAX: ffffffffffffffda RBX: 00007ffcbe3f8220 RCX: 000000000044766a [ 35.253756] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffcbe3f81e0 [ 35.261016] RBP: 00007ffcbe3f81e0 R08: 00007ffcbe3f8220 R09: 00007ffc00000015 [ 35.268279] R10: 0000000000000000 R11: 0000000000000297 R12: 000000000000002f [ 35.275544] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 35.283877] Kernel Offset: disabled [ 35.287544] Rebooting in 86400 seconds..