[ 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 '10.128.1.40' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.857390] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 31.874076] EXT4-fs error (device loop0): ext4_mb_generate_buddy:754: group 0, block bitmap and bg descriptor inconsistent: 16384 vs 96 free clusters [ 31.892445] ------------[ cut here ]------------ [ 31.897296] WARNING: CPU: 1 PID: 8017 at fs/ext4/xattr.c:1660 ext4_xattr_set_entry+0x24c1/0x30f0 [ 31.906215] Kernel panic - not syncing: panic_on_warn set ... [ 31.906215] [ 31.913562] CPU: 1 PID: 8017 Comm: syz-executor597 Not tainted 4.14.216-syzkaller #0 [ 31.921430] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.930777] Call Trace: [ 31.933367] dump_stack+0x1b2/0x281 [ 31.936973] panic+0x1f9/0x42d [ 31.940267] ? add_taint.cold+0x16/0x16 [ 31.944225] ? ext4_xattr_set_entry+0x24c1/0x30f0 [ 31.949049] ? ext4_xattr_set_entry+0x24c1/0x30f0 [ 31.953873] __warn.cold+0x20/0x44 [ 31.957393] ? ist_end_non_atomic+0x10/0x10 [ 31.961704] ? ext4_xattr_set_entry+0x24c1/0x30f0 [ 31.966539] report_bug+0x208/0x250 [ 31.970148] do_error_trap+0x195/0x2d0 [ 31.974027] ? math_error+0x2d0/0x2d0 [ 31.977820] ? unwind_get_return_address+0x51/0x90 [ 31.982729] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 31.988071] ? __save_stack_trace+0xa0/0x160 [ 31.992478] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.997327] invalid_op+0x1b/0x40 [ 32.000764] RIP: 0010:ext4_xattr_set_entry+0x24c1/0x30f0 [ 32.006199] RSP: 0018:ffff8880958af4b0 EFLAGS: 00010297 [ 32.011542] RAX: ffff8880b2d16340 RBX: ffff888095ae3420 RCX: 0000000000000005 [ 32.019052] RDX: 0000000000000000 RSI: ffff8880958af7a8 RDI: ffff8880b4016460 [ 32.026303] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 [ 32.033566] R10: 0000000000000000 R11: ffff8880b2d16340 R12: 00000000000007dc [ 32.040818] R13: ffffffff879334c0 R14: 0000000000000000 R15: ffff8880958af7a8 [ 32.048097] ? lock_downgrade+0x740/0x740 [ 32.052233] ? ext4_xattr_inode_get+0x5d0/0x5d0 [ 32.056894] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 32.062333] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 32.067334] ? __kmalloc+0x3a4/0x400 [ 32.071026] ? ext4_xattr_block_set+0x1209/0x2af0 [ 32.075850] ext4_xattr_block_set+0x1334/0x2af0 [ 32.080502] ? ext4_xattr_ibody_set+0x280/0x280 [ 32.085164] ? __getblk_gfp+0x48/0x70 [ 32.088961] ? ext4_xattr_ibody_find+0x223/0x5c0 [ 32.093709] ? ext4_xattr_block_find+0x52/0x5a0 [ 32.098371] ? ext4_xattr_ibody_set+0x1bb/0x280 [ 32.103021] ext4_xattr_set_handle+0x839/0xd20 [ 32.107592] ? ext4_xattr_ibody_inline_set+0x280/0x280 [ 32.112871] ? is_bpf_text_address+0x91/0x150 [ 32.117345] ? __dquot_initialize+0x228/0xa70 [ 32.121831] ? lock_acquire+0x170/0x3f0 [ 32.125791] ? __ext4_journal_start_sb+0x105/0x3b0 [ 32.132712] ? ext4_xattr_set+0x19b/0x230 [ 32.136842] ext4_xattr_set+0x118/0x230 [ 32.140814] ? ext4_xattr_set_credits+0x1f0/0x1f0 [ 32.145639] ? kmem_cache_free+0x7c/0x2b0 [ 32.149767] ? xattr_resolve_name+0x22c/0x370 [ 32.154253] ? ext4_xattr_destroy_cache+0x30/0x30 [ 32.159085] __vfs_setxattr+0xdc/0x130 [ 32.162954] ? xattr_resolve_name+0x370/0x370 [ 32.167437] ? evm_protect_xattr.constprop.0+0x6c/0x350 [ 32.172780] __vfs_setxattr_noperm+0xfd/0x3d0 [ 32.177270] __vfs_setxattr_locked+0x14d/0x250 [ 32.181833] vfs_setxattr+0xcf/0x230 [ 32.185523] ? __check_object_size+0x119/0x230 [ 32.190093] ? __vfs_setxattr_locked+0x250/0x250 [ 32.194828] ? strncpy_from_user+0x210/0x2c0 [ 32.199214] setxattr+0x1a9/0x300 [ 32.202643] ? vfs_setxattr+0x230/0x230 [ 32.206606] ? filename_lookup+0x380/0x510 [ 32.210821] ? __check_object_size+0x179/0x230 [ 32.215384] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 32.220830] ? preempt_count_add+0xaf/0x170 [ 32.225143] ? __mnt_want_write+0x1da/0x270 [ 32.229458] path_setxattr+0x118/0x130 [ 32.233337] ? setxattr+0x300/0x300 [ 32.236963] SyS_setxattr+0x36/0x50 [ 32.240567] ? vfs_getxattr_alloc+0x2d0/0x2d0 [ 32.245041] do_syscall_64+0x1d5/0x640 [ 32.248925] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 32.254107] RIP: 0033:0x444709 [ 32.257279] RSP: 002b:00007ffe2e910038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc [ 32.264962] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000444709 [ 32.272226] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000040 [ 32.279483] RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000 [ 32.286730] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004022f0 [ 32.294411] R13: 0000000000402380 R14: 0000000000000000 R15: 0000000000000000 [ 32.302327] Kernel Offset: disabled [ 32.306000] Rebooting in 86400 seconds..