[ 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 '10.128.0.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 162.063029] IPVS: ftp: loaded support on port[0] = 21 [ 162.101620] kasan: CONFIG_KASAN_INLINE enabled [ 162.107870] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 162.115477] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 162.121707] Modules linked in: [ 162.124882] CPU: 1 PID: 8004 Comm: syz-executor998 Not tainted 4.14.229-syzkaller #0 [ 162.132763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 162.142097] task: ffff8880b3ecc200 task.stack: ffff8880b37d8000 [ 162.148136] RIP: 0010:rb_erase+0x29/0x1290 [ 162.152362] RSP: 0018:ffff8880b37dfa68 EFLAGS: 00010292 [ 162.157720] RAX: dffffc0000000000 RBX: ffff88808df575f0 RCX: 1ffff110166fbf27 [ 162.165053] RDX: 0000000000000001 RSI: ffffffff8bf99ea0 RDI: 0000000000000008 [ 162.172324] RBP: 0000000000000000 R08: ffffffff8ba2d17c R09: 0000000000001ccc [ 162.179596] R10: 0000000000000001 R11: ffff8880b3ecc200 R12: 0000000000000000 [ 162.186862] R13: dffffc0000000000 R14: ffff88808df4b838 R15: ffffffff8bf99ea0 [ 162.194114] FS: 00007fc2d1c52700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 162.202317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 162.210030] CR2: 00007fc2d1c51e40 CR3: 000000009a859000 CR4: 00000000001406e0 [ 162.217287] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 162.224553] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 162.231820] Call Trace: [ 162.234392] integrity_inode_free+0x119/0x300 [ 162.238884] security_inode_free+0x14/0x80 [ 162.243110] __destroy_inode+0x1e8/0x4d0 [ 162.247147] destroy_inode+0x49/0x110 [ 162.250923] iput+0x458/0x7e0 [ 162.254011] ? ext4_mark_dquot_dirty+0x190/0x190 [ 162.258748] ext4_ioctl+0x16c5/0x3870 [ 162.262548] ? get_futex_key+0x1160/0x1160 [ 162.266801] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 162.271987] ? __lock_acquire+0x5fc/0x3f20 [ 162.276217] ? lock_acquire+0x170/0x3f0 [ 162.280183] ? lock_downgrade+0x740/0x740 [ 162.284321] ? trace_hardirqs_on+0x10/0x10 [ 162.288549] ? futex_exit_release+0x220/0x220 [ 162.293038] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 162.298238] ? debug_check_no_obj_freed+0x2c0/0x680 [ 162.303265] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 162.308463] do_vfs_ioctl+0x75a/0xff0 [ 162.312940] ? ioctl_preallocate+0x1a0/0x1a0 [ 162.317327] ? lock_downgrade+0x740/0x740 [ 162.321477] ? __fget+0x225/0x360 [ 162.324918] ? do_vfs_ioctl+0xff0/0xff0 [ 162.328875] ? security_file_ioctl+0x83/0xb0 [ 162.333281] SyS_ioctl+0x7f/0xb0 [ 162.336625] ? do_vfs_ioctl+0xff0/0xff0 [ 162.340578] do_syscall_64+0x1d5/0x640 [ 162.344458] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 162.349622] RIP: 0033:0x44a3f9 [ 162.352800] RSP: 002b:00007fc2d1c52208 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 162.360483] RAX: ffffffffffffffda RBX: 00000000004cb418 RCX: 000000000044a3f9 [ 162.367730] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 [ 162.375006] RBP: 00000000004cb410 R08: 0000000000000000 R09: 0000000000000000 [ 162.382354] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb41c [ 162.389615] R13: 00007fff371bd75f R14: 00007fc2d1c52300 R15: 0000000000022000 [ 162.396890] Code: ff ff 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 f7 41 56 41 55 41 54 49 89 fc 48 83 c7 08 48 89 fa 55 48 c1 ea 03 53 48 83 ec 18 <80> 3c 02 00 0f 85 f2 0c 00 00 49 8d 7c 24 10 4d 8b 74 24 08 48 [ 162.415968] RIP: rb_erase+0x29/0x1290 RSP: ffff8880b37dfa68 [ 162.421785] ---[ end trace d214592f02e2b1f7 ]--- [ 162.426669] Kernel panic - not syncing: Fatal exception [ 162.432818] Kernel Offset: disabled [ 162.436430] Rebooting in 86400 seconds..