[ 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 '10.128.15.200' (ECDSA) to the list of known hosts. syzkaller login: [ 34.152921] audit: type=1400 audit(1590565598.796:8): avc: denied { execmem } for pid=6326 comm="syz-executor858" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 34.441882] IPVS: ftp: loaded support on port[0] = 21 executing program [ 35.207078] kasan: CONFIG_KASAN_INLINE enabled [ 35.211762] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.219119] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.225336] Modules linked in: [ 35.228516] CPU: 0 PID: 6350 Comm: syz-executor858 Not tainted 4.14.181-syzkaller #0 [ 35.236406] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.245750] task: ffff88809a37e100 task.stack: ffff888090b38000 [ 35.251793] RIP: 0010:rb_erase+0x29/0x1890 [ 35.256005] RSP: 0018:ffff888090b3fa60 EFLAGS: 00010286 [ 35.261342] RAX: dffffc0000000000 RBX: ffff88808260b3f0 RCX: 0000000000000001 [ 35.268590] RDX: 0000000000000001 RSI: ffffffff8a452ee0 RDI: 0000000000000008 [ 35.275835] RBP: 0000000000000000 R08: ffffffff89eeeccc R09: 0000000000001e6c [ 35.283079] R10: ffff888090b3f870 R11: ffff88809a37e100 R12: 0000000000000000 [ 35.290323] R13: dffffc0000000000 R14: ffff88808260c4b8 R15: ffffffff8a452ee0 [ 35.297570] FS: 00007f675a322700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 35.305798] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.311653] CR2: 0000000020000000 CR3: 000000008d1cc000 CR4: 00000000001406f0 [ 35.318905] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.326149] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.333406] Call Trace: [ 35.335974] integrity_inode_free+0x119/0x300 [ 35.340461] security_inode_free+0x14/0x80 [ 35.344670] __destroy_inode+0x1e8/0x4d0 [ 35.351156] destroy_inode+0x49/0x110 [ 35.354948] iput+0x457/0x8d0 [ 35.358036] ? ext4_mark_dquot_dirty+0x190/0x190 [ 35.362787] ext4_ioctl+0x123c/0x39f0 [ 35.366567] ? avc_ss_reset+0x100/0x100 [ 35.370525] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 35.375693] ? __lock_acquire+0x655/0x42a0 [ 35.379914] ? do_futex+0x131/0x1850 [ 35.383616] ? trace_hardirqs_on+0x10/0x10 [ 35.387829] ? ext4_ioctl_check_immutable+0x1c0/0x1c0 [ 35.393004] do_vfs_ioctl+0x75a/0xfe0 [ 35.396783] ? selinux_parse_skb.constprop.0+0x16c0/0x16c0 [ 35.402384] ? ioctl_preallocate+0x1a0/0x1a0 [ 35.406770] ? security_file_ioctl+0x76/0xb0 [ 35.411163] ? security_file_ioctl+0x83/0xb0 [ 35.415546] SyS_ioctl+0x7f/0xb0 [ 35.418888] ? do_vfs_ioctl+0xfe0/0xfe0 [ 35.422850] do_syscall_64+0x1d5/0x640 [ 35.426713] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.431877] RIP: 0033:0x446009 [ 35.435041] RSP: 002b:00007f675a321db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 35.442740] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446009 [ 35.449984] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003 [ 35.457229] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 35.464482] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 35.471727] R13: 00007ffc6089cb7f R14: 00007f675a3229c0 R15: 00000000006dbc2c [ 35.479065] Code: 00 00 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 20 <80> 3c 02 00 0f 85 f2 0e 00 00 49 8d 7c 24 10 4d 8b 74 24 08 48 [ 35.498259] RIP: rb_erase+0x29/0x1890 RSP: ffff888090b3fa60 [ 35.504016] ---[ end trace ac2f93cc920e02a5 ]--- [ 35.508746] Kernel panic - not syncing: Fatal exception [ 35.514683] Kernel Offset: disabled [ 35.518293] Rebooting in 86400 seconds..