[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.273078][ T27] audit: type=1800 audit(1578454317.798:25): pid=9451 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.292837][ T27] audit: type=1800 audit(1578454317.798:26): pid=9451 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.363638][ T27] audit: type=1800 audit(1578454317.798:27): pid=9451 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.207' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.667068][ T9604] kasan: CONFIG_KASAN_INLINE enabled [ 91.672439][ T9604] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 91.680583][ T9604] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 91.687517][ T9604] CPU: 0 PID: 9604 Comm: syz-executor408 Not tainted 5.5.0-rc5-syzkaller #0 [ 91.696165][ T9604] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.706209][ T9604] RIP: 0010:hash_ipportnet4_uadt+0x20b/0x13e0 [ 91.712253][ T9604] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 71 0c 00 00 4c 89 e2 45 8b 6d 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c [ 91.731833][ T9604] RSP: 0018:ffffc90002587140 EFLAGS: 00010246 [ 91.737875][ T9604] RAX: dffffc0000000000 RBX: ffffc90002587310 RCX: 0000000000000000 [ 91.746506][ T9604] RDX: 0000000000000000 RSI: ffffffff867e1e88 RDI: ffff8880a7894470 [ 91.754476][ T9604] RBP: ffffc900025872a8 R08: 0000000000000000 R09: 0000000000000000 [ 91.762433][ T9604] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 91.770385][ T9604] R13: 0000000002000000 R14: ffffc90002587210 R15: ffff8880a6796000 [ 91.778337][ T9604] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000096e1840 [ 91.787241][ T9604] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 91.793800][ T9604] CR2: 0000000020000446 CR3: 0000000097ee7000 CR4: 00000000001406f0 [ 91.801748][ T9604] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.809703][ T9604] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.817662][ T9604] Call Trace: [ 91.820930][ T9604] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 91.826807][ T9604] ? hash_ipportnet6_test+0x10c0/0x10c0 [ 91.832335][ T9604] ? hash_ipportnet6_uadt+0xeb0/0xeb0 [ 91.837777][ T9604] ? nla_memcpy+0xb0/0xb0 [ 91.842601][ T9604] ? ip_set_utest+0x4aa/0x890 [ 91.847299][ T9604] ? __kasan_check_read+0x11/0x20 [ 91.852309][ T9604] ip_set_utest+0x55b/0x890 [ 91.856787][ T9604] ? ip_set_put_byindex+0x490/0x490 [ 91.861960][ T9604] ? __mutex_lock+0x458/0x13c0 [ 91.866708][ T9604] ? ip_set_put_byindex+0x490/0x490 [ 91.871894][ T9604] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 91.877074][ T9604] ? nfnetlink_bind+0x2c0/0x2c0 [ 91.881907][ T9604] ? __kasan_check_read+0x11/0x20 [ 91.886911][ T9604] ? __lock_acquire+0x8a0/0x4a00 [ 91.891824][ T9604] ? save_stack+0x5c/0x90 [ 91.896143][ T9604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.902359][ T9604] ? apparmor_capable+0x497/0x900 [ 91.907377][ T9604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.913602][ T9604] ? __kasan_check_read+0x11/0x20 [ 91.918605][ T9604] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 91.924051][ T9604] netlink_rcv_skb+0x177/0x450 [ 91.928791][ T9604] ? nfnetlink_bind+0x2c0/0x2c0 [ 91.933616][ T9604] ? netlink_ack+0xb50/0xb50 [ 91.938200][ T9604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.944416][ T9604] ? ns_capable_common+0x93/0x100 [ 91.949416][ T9604] ? ns_capable+0x20/0x30 [ 91.953726][ T9604] ? __netlink_ns_capable+0x104/0x140 [ 91.959076][ T9604] nfnetlink_rcv+0x1ba/0x460 [ 91.963641][ T9604] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 91.969097][ T9604] ? netlink_deliver_tap+0x24a/0xbe0 [ 91.974373][ T9604] ? __kasan_check_write+0x14/0x20 [ 91.979465][ T9604] netlink_unicast+0x58c/0x7d0 [ 91.984209][ T9604] ? netlink_attachskb+0x870/0x870 [ 91.989345][ T9604] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 91.995042][ T9604] ? __check_object_size+0x3d/0x437 [ 92.000220][ T9604] netlink_sendmsg+0x91c/0xea0 [ 92.004966][ T9604] ? netlink_unicast+0x7d0/0x7d0 [ 92.009929][ T9604] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 92.015463][ T9604] ? apparmor_socket_sendmsg+0x2a/0x30 [ 92.020896][ T9604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.027128][ T9604] ? security_socket_sendmsg+0x8d/0xc0 [ 92.032563][ T9604] ? netlink_unicast+0x7d0/0x7d0 [ 92.037477][ T9604] sock_sendmsg+0xd7/0x130 [ 92.041872][ T9604] ____sys_sendmsg+0x753/0x880 [ 92.046623][ T9604] ? kernel_sendmsg+0x50/0x50 [ 92.051275][ T9604] ? lockdep_init_map+0x1be/0x6d0 [ 92.056287][ T9604] ___sys_sendmsg+0x100/0x170 [ 92.060938][ T9604] ? sendmsg_copy_msghdr+0x70/0x70 [ 92.066038][ T9604] ? __kasan_check_read+0x11/0x20 [ 92.071037][ T9604] ? __lock_acquire+0x8a0/0x4a00 [ 92.075958][ T9604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.082171][ T9604] ? __this_cpu_preempt_check+0x35/0x190 [ 92.087777][ T9604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.093991][ T9604] ? percpu_counter_add_batch+0x13c/0x190 [ 92.099688][ T9604] ? __fd_install+0x1bc/0x640 [ 92.104357][ T9604] ? find_held_lock+0x35/0x130 [ 92.109212][ T9604] ? __fd_install+0x1bc/0x640 [ 92.113878][ T9604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.120096][ T9604] ? __fget_light+0x1a9/0x230 [ 92.124746][ T9604] ? __fdget+0x1b/0x20 [ 92.128807][ T9604] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.135030][ T9604] __sys_sendmsg+0x105/0x1d0 [ 92.140107][ T9604] ? __sys_sendmsg_sock+0xc0/0xc0 [ 92.145119][ T9604] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.150564][ T9604] ? do_fast_syscall_32+0xd1/0xe16 [ 92.155653][ T9604] ? entry_SYSENTER_compat+0x70/0x7f [ 92.160933][ T9604] ? do_fast_syscall_32+0xd1/0xe16 [ 92.166026][ T9604] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 92.171461][ T9604] do_fast_syscall_32+0x27b/0xe16 [ 92.176465][ T9604] entry_SYSENTER_compat+0x70/0x7f [ 92.181560][ T9604] RIP: 0023:0xf7fc7a39 [ 92.185606][ T9604] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 92.205187][ T9604] RSP: 002b:00000000fffc6d3c EFLAGS: 00000202 ORIG_RAX: 0000000000000172 [ 92.213595][ T9604] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000140 [ 92.221571][ T9604] RDX: 0000000000000002 RSI: 00000000080eb080 RDI: 00000000fffc6d90 [ 92.229536][ T9604] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 92.237490][ T9604] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 92.245940][ T9604] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 92.253917][ T9604] Modules linked in: [ 92.257861][ T9604] ---[ end trace 0c199c0343ef137b ]--- [ 92.263329][ T9604] RIP: 0010:hash_ipportnet4_uadt+0x20b/0x13e0 [ 92.269415][ T9604] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 71 0c 00 00 4c 89 e2 45 8b 6d 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c [ 92.289036][ T9604] RSP: 0018:ffffc90002587140 EFLAGS: 00010246 [ 92.295083][ T9604] RAX: dffffc0000000000 RBX: ffffc90002587310 RCX: 0000000000000000 [ 92.303071][ T9604] RDX: 0000000000000000 RSI: ffffffff867e1e88 RDI: ffff8880a7894470 [ 92.311071][ T9604] RBP: ffffc900025872a8 R08: 0000000000000000 R09: 0000000000000000 [ 92.319061][ T9604] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 92.327036][ T9604] R13: 0000000002000000 R14: ffffc90002587210 R15: ffff8880a6796000 [ 92.334987][ T9604] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000096e1840 [ 92.344385][ T9604] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 92.351007][ T9604] CR2: 0000000020000446 CR3: 0000000097ee7000 CR4: 00000000001406f0 [ 92.359010][ T9604] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.367032][ T9604] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.374993][ T9604] Kernel panic - not syncing: Fatal exception in interrupt [ 92.383560][ T9604] Kernel Offset: disabled [ 92.387901][ T9604] Rebooting in 86400 seconds..