[ 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 '10.128.0.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.285639] audit: type=1400 audit(1600177785.533:8): avc: denied { execmem } for pid=6486 comm="syz-executor305" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.293929] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 39.313904] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 39.322616] F2FS-fs (loop0): invalid crc value [ 39.329902] attempt to access beyond end of device [ 39.335710] loop0: rw=12288, want=12296, limit=8287 [ 39.340785] attempt to access beyond end of device [ 39.345803] loop0: rw=12288, want=12296, limit=8287 [ 39.350846] attempt to access beyond end of device [ 39.355855] loop0: rw=12288, want=12296, limit=8287 [ 39.360894] attempt to access beyond end of device [ 39.365905] loop0: rw=12288, want=12296, limit=8287 [ 39.371024] attempt to access beyond end of device [ 39.375949] loop0: rw=12288, want=12296, limit=8287 [ 39.381613] attempt to access beyond end of device [ 39.386543] loop0: rw=12288, want=12296, limit=8287 [ 39.391787] attempt to access beyond end of device [ 39.396711] loop0: rw=12288, want=12296, limit=8287 [ 39.401900] attempt to access beyond end of device [ 39.406823] loop0: rw=12288, want=12296, limit=8287 [ 39.411948] attempt to access beyond end of device [ 39.416879] loop0: rw=12288, want=12296, limit=8287 [ 39.422062] attempt to access beyond end of device [ 39.426990] loop0: rw=12288, want=12296, limit=8287 [ 39.432584] ------------[ cut here ]------------ [ 39.437333] kernel BUG at fs/f2fs/checkpoint.c:127! [ 39.442418] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 39.447774] CPU: 1 PID: 6486 Comm: syz-executor305 Not tainted 4.19.145-syzkaller #0 [ 39.455676] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.465013] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 39.470698] 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 2a 3f 04 48 89 ef e8 93 a2 02 00 <0f> 0b e8 1c 38 a0 fe eb 80 be 04 00 00 00 e8 00 3c a0 fe eb d1 0f [ 39.489575] RSP: 0018:ffff888085f9f880 EFLAGS: 00010293 [ 39.494915] RAX: ffff888084a84380 RBX: ffff8880a4e6ca40 RCX: ffffffff83022501 [ 39.502201] RDX: 0000000000000000 RSI: ffffffff82ffa2dd RDI: 0000000000000005 [ 39.509447] RBP: ffff888084af9080 R08: ffffffff8b40f6d8 R09: 0000000000000001 [ 39.516729] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000282 [ 39.523975] R13: ffff888084af9578 R14: 0000000000000080 R15: dffffc0000000000 [ 39.531240] FS: 0000000001ce7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 39.539472] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.545366] CR2: 000000000043ed10 CR3: 00000000905ef000 CR4: 00000000001406e0 [ 39.552629] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.559878] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.567165] Call Trace: [ 39.569734] f2fs_build_segment_manager+0x5ea5/0xac60 [ 39.574908] ? f2fs_flush_sit_entries+0x3370/0x3370 [ 39.579946] ? map_id_range_down+0x1c4/0x340 [ 39.584334] ? __lockdep_init_map+0x100/0x5a0 [ 39.588803] ? __lockdep_init_map+0x100/0x5a0 [ 39.593275] f2fs_fill_super+0x31d9/0x7050 [ 39.597522] ? snprintf+0xbb/0xf0 [ 39.600950] ? f2fs_commit_super+0x400/0x400 [ 39.605336] ? wait_for_completion_io+0x10/0x10 [ 39.609981] ? set_blocksize+0x163/0x3f0 [ 39.614022] mount_bdev+0x2fc/0x3b0 [ 39.617624] ? f2fs_commit_super+0x400/0x400 [ 39.622008] mount_fs+0xa3/0x30c [ 39.625352] vfs_kern_mount.part.0+0x68/0x470 [ 39.629823] do_mount+0x113c/0x2f10 [ 39.633428] ? lock_acquire+0x170/0x3c0 [ 39.637377] ? check_preemption_disabled+0x41/0x280 [ 39.642370] ? copy_mount_string+0x40/0x40 [ 39.646617] ? copy_mount_options+0x59/0x380 [ 39.651005] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 39.655996] ? kmem_cache_alloc_trace+0x323/0x380 [ 39.660885] ? copy_mount_options+0x26f/0x380 [ 39.665393] ksys_mount+0xcf/0x130 [ 39.668910] __x64_sys_mount+0xba/0x150 [ 39.672861] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 39.677419] do_syscall_64+0xf9/0x620 [ 39.681196] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.686369] RIP: 0033:0x446efa [ 39.689541] 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 [ 39.708430] RSP: 002b:00007ffc4120a498 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 39.716113] RAX: ffffffffffffffda RBX: 00007ffc4120a4f0 RCX: 0000000000446efa [ 39.723361] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc4120a4b0 [ 39.730617] RBP: 00007ffc4120a4b0 R08: 00007ffc4120a4f0 R09: 00007ffc00000015 [ 39.737864] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000005 [ 39.745224] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 39.752476] Modules linked in: [ 39.756126] ---[ end trace bbd012cd30816666 ]--- [ 39.760926] RIP: 0010:f2fs_get_meta_page_nofail+0x12d/0x150 [ 39.766635] 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 2a 3f 04 48 89 ef e8 93 a2 02 00 <0f> 0b e8 1c 38 a0 fe eb 80 be 04 00 00 00 e8 00 3c a0 fe eb d1 0f [ 39.785630] RSP: 0018:ffff888085f9f880 EFLAGS: 00010293 [ 39.791041] RAX: ffff888084a84380 RBX: ffff8880a4e6ca40 RCX: ffffffff83022501 [ 39.798305] RDX: 0000000000000000 RSI: ffffffff82ffa2dd RDI: 0000000000000005 [ 39.805907] RBP: ffff888084af9080 R08: ffffffff8b40f6d8 R09: 0000000000000001 [ 39.813382] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000282 [ 39.820743] R13: ffff888084af9578 R14: 0000000000000080 R15: dffffc0000000000 [ 39.828020] FS: 0000000001ce7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 39.836359] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.842315] CR2: 000000000043ed10 CR3: 00000000905ef000 CR4: 00000000001406e0 [ 39.849584] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.856868] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.864191] Kernel panic - not syncing: Fatal exception [ 39.870868] Kernel Offset: disabled [ 39.874497] Rebooting in 86400 seconds..