[ 47.187689] audit: type=1800 audit(1583239984.194:29): pid=8029 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 47.225225] audit: type=1800 audit(1583239984.194:30): pid=8029 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.201' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.714621] kauditd_printk_skb: 5 callbacks suppressed [ 55.714636] audit: type=1400 audit(1583239992.724:36): avc: denied { map } for pid=8217 comm="syz-executor572" path="/root/syz-executor572207474" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 55.718770] netlink: 20 bytes leftover after parsing attributes in process `syz-executor572'. [ 55.720131] audit: type=1400 audit(1583239992.724:37): avc: denied { create } for pid=8217 comm="syz-executor572" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 55.747277] kasan: CONFIG_KASAN_INLINE enabled [ 55.755822] audit: type=1400 audit(1583239992.724:38): avc: denied { write } for pid=8217 comm="syz-executor572" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 55.780384] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 55.817335] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 55.823684] CPU: 1 PID: 8217 Comm: syz-executor572 Not tainted 4.19.107-syzkaller #0 [ 55.831559] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.840935] RIP: 0010:nfnetlink_parse_nat_setup+0x21a/0x410 [ 55.846650] Code: c3 89 c6 e8 f8 7f 95 fb 85 db 0f 88 72 01 00 00 e8 7b 7e 95 fb 49 8d 7e 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d2 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38 [ 55.865869] RSP: 0018:ffff88808ffe71e0 EFLAGS: 00010203 [ 55.871381] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d21a38 [ 55.878749] RDX: 0000000000000007 RSI: ffffffff85d21a45 RDI: 000000000000003c [ 55.886028] RBP: ffff8880a07ed040 R08: ffff888091d8c280 R09: ffff88808ffe7260 [ 55.893308] R10: ffffed1011ffce51 R11: ffff88808ffe728f R12: 0000000000000000 [ 55.900721] R13: 0000000000000001 R14: 0000000000000004 R15: ffff88808ffe7210 [ 55.908276] FS: 0000000000c0a880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 55.916514] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.922392] CR2: 0000000020000280 CR3: 0000000089508000 CR4: 00000000001406e0 [ 55.929810] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.937078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.944345] Call Trace: [ 55.946926] ? nf_nat_inet_fn+0x8c0/0x8c0 [ 55.951180] ? __lock_is_held+0xad/0x140 [ 55.955256] ctnetlink_parse_nat_setup+0xb6/0x640 [ 55.960093] ctnetlink_create_conntrack+0x4b7/0x1280 [ 55.965326] ? ctnetlink_dump_table+0x11e0/0x11e0 [ 55.970168] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 55.975442] ? hash_conntrack_raw+0x2d3/0x450 [ 55.979943] ? nf_ct_unconfirmed_destroy+0xa0/0xa0 [ 55.984876] ? __nf_conntrack_confirm+0x2fc0/0x2fc0 [ 55.989911] ctnetlink_new_conntrack+0x4f5/0xde0 [ 55.994673] ? ctnetlink_create_conntrack+0x1280/0x1280 [ 56.000254] ? mutex_trylock+0x1a0/0x1a0 [ 56.004484] ? __lock_is_held+0xad/0x140 [ 56.008546] ? check_preemption_disabled+0x41/0x280 [ 56.013769] ? ctnetlink_create_conntrack+0x1280/0x1280 [ 56.019260] nfnetlink_rcv_msg+0xc9e/0xf4b [ 56.023600] ? nfnetlink_bind+0x2b0/0x2b0 [ 56.027861] ? __lock_acquire+0x6ee/0x49c0 [ 56.032094] ? __alloc_skb+0xef/0x5b0 [ 56.035891] ? cred_has_capability+0x162/0x2e0 [ 56.040472] ? cred_has_capability+0x16d/0x2e0 [ 56.045061] ? selinux_ipv4_output+0x50/0x50 [ 56.049471] ? selinux_ipv4_output+0x50/0x50 [ 56.053935] netlink_rcv_skb+0x160/0x410 [ 56.058078] ? nfnetlink_bind+0x2b0/0x2b0 [ 56.062240] ? netlink_ack+0xa60/0xa60 [ 56.066226] ? ns_capable_common+0xe2/0x100 [ 56.070548] nfnetlink_rcv+0x1b2/0x420 [ 56.074428] ? nfnetlink_rcv_batch+0x15e0/0x15e0 [ 56.079195] netlink_unicast+0x4d7/0x6a0 [ 56.083258] ? netlink_attachskb+0x710/0x710 [ 56.087777] netlink_sendmsg+0x80b/0xcd0 [ 56.091827] ? netlink_unicast+0x6a0/0x6a0 [ 56.096141] ? move_addr_to_kernel.part.0+0x110/0x110 [ 56.101344] ? netlink_unicast+0x6a0/0x6a0 [ 56.105578] sock_sendmsg+0xcf/0x120 [ 56.109298] ___sys_sendmsg+0x803/0x920 [ 56.113261] ? copy_msghdr_from_user+0x410/0x410 [ 56.118020] ? prep_transhuge_page+0xa0/0xa0 [ 56.122434] ? pud_val+0x7c/0xf0 [ 56.125795] ? __pmd+0x60/0x60 [ 56.129048] ? __handle_mm_fault+0x754/0x3b60 [ 56.133637] ? copy_page_range+0x1e70/0x1e70 [ 56.138095] ? count_memcg_event_mm+0x279/0x4c0 [ 56.142858] ? find_held_lock+0x2d/0x110 [ 56.147474] ? __do_page_fault+0x631/0xdd0 [ 56.151699] ? __fget_light+0x1a2/0x230 [ 56.155854] __sys_sendmsg+0xec/0x1b0 [ 56.159727] ? __ia32_sys_shutdown+0x70/0x70 [ 56.164150] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 56.169048] ? trace_hardirqs_off_caller+0x55/0x210 [ 56.174614] ? do_syscall_64+0x21/0x620 [ 56.178592] do_syscall_64+0xf9/0x620 [ 56.182386] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.187580] RIP: 0033:0x4401a9 [ 56.190776] 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 [ 56.209674] RSP: 002b:00007ffd0414c948 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 56.217394] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401a9 [ 56.224667] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 56.232000] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 56.239280] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a30 [ 56.246715] R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000 [ 56.253986] Modules linked in: [ 56.257342] ---[ end trace e6b2f385ce13ad47 ]--- [ 56.262202] RIP: 0010:nfnetlink_parse_nat_setup+0x21a/0x410 [ 56.267961] Code: c3 89 c6 e8 f8 7f 95 fb 85 db 0f 88 72 01 00 00 e8 7b 7e 95 fb 49 8d 7e 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d2 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38 [ 56.287156] RSP: 0018:ffff88808ffe71e0 EFLAGS: 00010203 [ 56.292518] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d21a38 [ 56.299847] RDX: 0000000000000007 RSI: ffffffff85d21a45 RDI: 000000000000003c [ 56.307987] RBP: ffff8880a07ed040 R08: ffff888091d8c280 R09: ffff88808ffe7260 [ 56.315710] R10: ffffed1011ffce51 R11: ffff88808ffe728f R12: 0000000000000000 [ 56.323017] R13: 0000000000000001 R14: 0000000000000004 R15: ffff88808ffe7210 [ 56.330368] FS: 0000000000c0a880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 56.338640] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.344559] CR2: 0000000020000280 CR3: 0000000089508000 CR4: 00000000001406e0 [ 56.353011] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.360904] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.368328] Kernel panic - not syncing: Fatal exception [ 56.375712] Kernel Offset: disabled [ 56.379356] Rebooting in 86400 seconds..