[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.599829][ T28] audit: type=1400 audit(1600623074.793:8): avc: denied { execmem } for pid=6861 comm="syz-executor472" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 66.608354][ T6861] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 66.629070][ T6861] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 66.639048][ T6861] F2FS-fs (loop0): invalid crc_offset: 0 [ 66.670175][ T6861] F2FS-fs (loop0): access invalid blkaddr:1 [ 66.676401][ T6861] ------------[ cut here ]------------ [ 66.682790][ T6861] WARNING: CPU: 0 PID: 6861 at fs/f2fs/checkpoint.c:189 f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 66.693604][ T6861] Kernel panic - not syncing: panic_on_warn set ... [ 66.700238][ T6861] CPU: 0 PID: 6861 Comm: syz-executor472 Not tainted 5.9.0-rc5-syzkaller #0 [ 66.708881][ T6861] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.719137][ T6861] Call Trace: [ 66.722452][ T6861] dump_stack+0x198/0x1fd [ 66.726763][ T6861] panic+0x382/0x7fb [ 66.730642][ T6861] ? __warn_printk+0xf3/0xf3 [ 66.735226][ T6861] ? printk+0xba/0xed [ 66.739185][ T6861] ? log_store.cold+0x16/0x16 [ 66.743842][ T6861] ? printk+0xba/0xed [ 66.747799][ T6861] ? __warn.cold+0x5/0x4b [ 66.752106][ T6861] ? __warn+0xd6/0x1f2 [ 66.756169][ T6861] ? f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 66.761602][ T6861] __warn.cold+0x20/0x4b [ 66.765821][ T6861] ? f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 66.771278][ T6861] report_bug+0x1bd/0x210 [ 66.775586][ T6861] handle_bug+0x38/0x90 [ 66.779716][ T6861] exc_invalid_op+0x14/0x40 [ 66.784213][ T6861] asm_exc_invalid_op+0x12/0x20 [ 66.789041][ T6861] RIP: 0010:f2fs_is_valid_blkaddr+0xdb2/0xf80 [ 66.795084][ T6861] Code: 89 e2 48 89 df 48 c7 c6 a0 90 cd 88 e8 e7 fa fe ff 48 8d bb b8 00 00 00 be 08 00 00 00 e8 26 11 5e fe f0 80 8b b8 00 00 00 04 <0f> 0b e9 af f7 ff ff e8 b2 3e 5e fe e9 a5 fa ff ff e8 b8 3e 5e fe [ 66.814700][ T6861] RSP: 0018:ffffc90005187738 EFLAGS: 00010206 [ 66.820746][ T6861] RAX: 0000000000000001 RBX: ffff8880a6ff8000 RCX: ffffffff8358d09a [ 66.828711][ T6861] RDX: ffffed1014dff018 RSI: 0000000000000008 RDI: ffff8880a6ff80b8 [ 66.836670][ T6861] RBP: 0000000000000007 R08: 0000000000000001 R09: ffff8880a6ff80bf [ 66.844636][ T6861] R10: ffffed1014dff017 R11: 0000000000000000 R12: 0000000000000001 [ 66.852588][ T6861] R13: ffff888097a27c00 R14: 0000000000001400 R15: 0000000000000400 [ 66.860585][ T6861] ? f2fs_is_valid_blkaddr+0xdaa/0xf80 [ 66.867953][ T6861] ? f2fs_is_valid_blkaddr+0xdaa/0xf80 [ 66.873402][ T6861] f2fs_get_node_info+0x4b4/0xbc0 [ 66.878407][ T6861] ? lru_cache_add+0x594/0xb40 [ 66.883192][ T6861] ? f2fs_try_to_free_nats+0x330/0x330 [ 66.888643][ T6861] ? lock_downgrade+0x7a0/0x830 [ 66.893474][ T6861] ? find_get_pages_range_tag+0xd40/0xd40 [ 66.899184][ T6861] read_node_page+0x4a6/0x9b0 [ 66.903837][ T6861] ? truncate_node+0x8d0/0x8d0 [ 66.908592][ T6861] ? lru_cache_add+0x5ca/0xb40 [ 66.913349][ T6861] ? pagecache_get_page+0x22b/0xf70 [ 66.918526][ T6861] __get_node_page.part.0+0xa2/0xac0 [ 66.923791][ T6861] f2fs_get_node_page+0x109/0x180 [ 66.928792][ T6861] f2fs_iget+0x233/0x4b10 [ 66.933100][ T6861] ? __mutex_unlock_slowpath+0xe2/0x610 [ 66.938623][ T6861] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 66.944157][ T6861] ? wait_for_completion+0x260/0x260 [ 66.949424][ T6861] f2fs_fill_super+0x3ae8/0x6e80 [ 66.954359][ T6861] ? f2fs_commit_super+0x840/0x840 [ 66.959448][ T6861] ? set_blocksize+0x1c1/0x400 [ 66.964194][ T6861] mount_bdev+0x32e/0x3f0 [ 66.968497][ T6861] ? f2fs_commit_super+0x840/0x840 [ 66.973587][ T6861] ? __bpf_trace_f2fs_fiemap+0x1b0/0x1b0 [ 66.979208][ T6861] legacy_get_tree+0x105/0x220 [ 66.983949][ T6861] vfs_get_tree+0x89/0x2f0 [ 66.988364][ T6861] path_mount+0x1387/0x20a0 [ 66.992857][ T6861] ? strncpy_from_user+0x2bf/0x3e0 [ 66.997950][ T6861] ? copy_mount_string+0x40/0x40 [ 67.003061][ T6861] ? getname_flags.part.0+0x1dd/0x4f0 [ 67.008424][ T6861] __x64_sys_mount+0x27f/0x300 [ 67.013178][ T6861] ? copy_mnt_ns+0xa60/0xa60 [ 67.017785][ T6861] ? check_preemption_disabled+0x50/0x130 [ 67.023479][ T6861] ? syscall_enter_from_user_mode+0x1d/0x60 [ 67.029516][ T6861] do_syscall_64+0x2d/0x70 [ 67.033928][ T6861] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.039801][ T6861] RIP: 0033:0x44766a [ 67.043678][ T6861] 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 [ 67.063275][ T6861] RSP: 002b:00007ffe48abef58 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 67.071726][ T6861] RAX: ffffffffffffffda RBX: 00007ffe48abefb0 RCX: 000000000044766a [ 67.079898][ T6861] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe48abef70 [ 67.087872][ T6861] RBP: 00007ffe48abef70 R08: 00007ffe48abefb0 R09: 00007ffe00000015 [ 67.096090][ T6861] R10: 0000000000000000 R11: 0000000000000297 R12: 000000000000002f [ 67.104040][ T6861] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 67.113460][ T6861] Kernel Offset: disabled [ 67.117839][ T6861] Rebooting in 86400 seconds..