[ 43.848774] audit: type=1800 audit(1578739132.877:30): pid=7947 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 47.966531] kauditd_printk_skb: 4 callbacks suppressed [ 47.966547] audit: type=1400 audit(1578739137.017:35): avc: denied { map } for pid=8118 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. executing program [ 54.810678] audit: type=1400 audit(1578739143.857:36): avc: denied { map } for pid=8130 comm="syz-executor607" path="/root/syz-executor607064675" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 54.815466] kasan: CONFIG_KASAN_INLINE enabled [ 54.842155] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 54.850276] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 54.856690] CPU: 1 PID: 8130 Comm: syz-executor607 Not tainted 4.19.94-syzkaller #0 [ 54.864503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.873879] RIP: 0010:nf_ct_netns_do_get+0xd3/0x5c0 [ 54.878900] Code: 92 73 fb 45 84 ff 0f 84 6f 02 00 00 e8 e6 90 73 fb 49 8d bc 24 48 1b 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 cd 04 00 00 4d 8b bc 24 48 1b 00 00 e8 a6 a1 60 [ 54.897796] RSP: 0018:ffff88808449f808 EFLAGS: 00010206 [ 54.903148] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff85f7874a [ 54.910430] RDX: 0000000000000369 RSI: ffffffff85f784ca RDI: 0000000000001b48 [ 54.924810] RBP: ffff88808449f838 R08: ffff88808f268640 R09: ffffed1015d24733 [ 54.932086] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000000000 [ 54.939356] R13: 0000000000000003 R14: 0000000000000028 R15: 0000000000000001 [ 54.946633] FS: 0000000001ec2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 54.954936] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.960813] CR2: 0000000020000420 CR3: 0000000097da0000 CR4: 00000000001406e0 [ 54.968090] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.975363] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.982708] Call Trace: [ 54.985305] nf_ct_netns_get+0x3d/0xc0 [ 54.989194] connmark_tg_check+0x61/0xe0 [ 54.997096] ? connmark_mt_destroy+0x80/0x80 [ 55.001499] xt_check_target+0x283/0x6a0 [ 55.005563] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 55.010652] ? mutex_unlock+0xd/0x10 [ 55.014355] ? xt_find_target+0x73/0x280 [ 55.018403] ? xt_find_target+0x73/0x280 [ 55.022471] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.028098] translate_table+0x1005/0x1d70 [ 55.032327] ? arpt_alloc_initial_table+0x690/0x690 [ 55.037355] ? lock_downgrade+0x880/0x880 [ 55.041516] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.047058] ? _copy_from_user+0xdd/0x150 [ 55.051225] do_arpt_set_ctl+0x303/0x640 [ 55.055312] ? compat_do_arpt_get_ctl+0x850/0x850 [ 55.060161] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 55.065003] ? wait_for_completion+0x440/0x440 [ 55.069588] ? mutex_unlock+0xd/0x10 [ 55.073297] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 55.078572] nf_setsockopt+0x77/0xd0 [ 55.082292] ip_setsockopt+0xdf/0x100 [ 55.086083] udp_setsockopt+0x68/0xb0 [ 55.089884] sock_common_setsockopt+0x94/0xd0 [ 55.094369] __sys_setsockopt+0x17a/0x280 [ 55.098525] ? kernel_accept+0x310/0x310 [ 55.102586] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.107339] ? do_syscall_64+0x26/0x620 [ 55.111360] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.116779] ? do_syscall_64+0x26/0x620 [ 55.120817] __x64_sys_setsockopt+0xbe/0x150 [ 55.125381] do_syscall_64+0xfd/0x620 [ 55.129214] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.134397] RIP: 0033:0x4416c9 [ 55.137585] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.156759] RSP: 002b:00007ffd55a2b268 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 55.164566] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004416c9 [ 55.171857] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 55.179163] RBP: 00000000006cb018 R08: 00000000000003d7 R09: 00000000004002c8 [ 55.186433] R10: 0000000020000400 R11: 0000000000000246 R12: 0000000000402f50 [ 55.193700] R13: 0000000000402fe0 R14: 0000000000000000 R15: 0000000000000000 [ 55.200969] Modules linked in: [ 55.205372] ---[ end trace 5056c962617c4256 ]--- [ 55.210287] RIP: 0010:nf_ct_netns_do_get+0xd3/0x5c0 [ 55.215503] Code: 92 73 fb 45 84 ff 0f 84 6f 02 00 00 e8 e6 90 73 fb 49 8d bc 24 48 1b 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 cd 04 00 00 4d 8b bc 24 48 1b 00 00 e8 a6 a1 60 [ 55.234484] RSP: 0018:ffff88808449f808 EFLAGS: 00010206 [ 55.239908] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff85f7874a [ 55.247259] RDX: 0000000000000369 RSI: ffffffff85f784ca RDI: 0000000000001b48 [ 55.254573] RBP: ffff88808449f838 R08: ffff88808f268640 R09: ffffed1015d24733 [ 55.261834] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000000000 [ 55.269151] R13: 0000000000000003 R14: 0000000000000028 R15: 0000000000000001 [ 55.276645] FS: 0000000001ec2880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 55.284922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.290819] CR2: ffffffffff600400 CR3: 0000000097da0000 CR4: 00000000001406f0 [ 55.298153] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.305453] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.312907] Kernel panic - not syncing: Fatal exception [ 55.320070] Kernel Offset: disabled [ 55.323724] Rebooting in 86400 seconds..