[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.590043][ T27] audit: type=1800 audit(1578471041.535:25): pid=9420 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.611404][ T27] audit: type=1800 audit(1578471041.535:26): pid=9420 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.664671][ T27] audit: type=1800 audit(1578471041.535:27): pid=9420 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 '10.128.0.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 92.476568][ T9573] kasan: CONFIG_KASAN_INLINE enabled [ 92.482101][ T9573] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 92.490219][ T9573] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 92.497809][ T9573] CPU: 0 PID: 9573 Comm: syz-executor402 Not tainted 5.5.0-rc5-syzkaller #0 [ 92.506711][ T9573] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.516888][ T9573] RIP: 0010:hash_ipportnet4_uadt+0x20b/0x13e0 [ 92.522954][ T9573] 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 [ 92.542548][ T9573] RSP: 0018:ffffc90001d47150 EFLAGS: 00010246 [ 92.548606][ T9573] RAX: dffffc0000000000 RBX: ffffc90001d47320 RCX: 0000000000000000 [ 92.556554][ T9573] RDX: 0000000000000000 RSI: ffffffff867e1e88 RDI: ffff8880a7999ca0 [ 92.564514][ T9573] RBP: ffffc90001d472b8 R08: 0000000000000000 R09: 0000000000000000 [ 92.572470][ T9573] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 92.580429][ T9573] R13: 0000000004000000 R14: ffffc90001d47220 R15: ffff8880a8ff3000 [ 92.588391][ T9573] FS: 00000000018b4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.597299][ T9573] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.603876][ T9573] CR2: 0000000020000086 CR3: 00000000a8e9c000 CR4: 00000000001406f0 [ 92.611827][ T9573] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.619779][ T9573] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.627728][ T9573] Call Trace: [ 92.630998][ T9573] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 92.636872][ T9573] ? hash_ipportnet6_test+0x10c0/0x10c0 [ 92.642409][ T9573] ? hash_ipportnet6_uadt+0xeb0/0xeb0 [ 92.647758][ T9573] ? nla_memcpy+0xb0/0xb0 [ 92.652069][ T9573] ? ip_set_utest+0x4aa/0x890 [ 92.656722][ T9573] ? __kasan_check_read+0x11/0x20 [ 92.662094][ T9573] ip_set_utest+0x55b/0x890 [ 92.666584][ T9573] ? ip_set_put_byindex+0x490/0x490 [ 92.671759][ T9573] ? __mutex_lock+0x458/0x13c0 [ 92.676505][ T9573] ? ip_set_put_byindex+0x490/0x490 [ 92.681684][ T9573] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 92.686608][ T9573] ? nfnetlink_bind+0x2c0/0x2c0 [ 92.691438][ T9573] ? __kasan_check_read+0x11/0x20 [ 92.696439][ T9573] ? __lock_acquire+0x8a0/0x4a00 [ 92.701364][ T9573] ? save_stack+0x5c/0x90 [ 92.705679][ T9573] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.711896][ T9573] ? apparmor_capable+0x497/0x900 [ 92.716898][ T9573] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.723124][ T9573] ? __kasan_check_read+0x11/0x20 [ 92.728138][ T9573] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 92.733593][ T9573] netlink_rcv_skb+0x177/0x450 [ 92.738334][ T9573] ? nfnetlink_bind+0x2c0/0x2c0 [ 92.743172][ T9573] ? netlink_ack+0xb50/0xb50 [ 92.747747][ T9573] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.754006][ T9573] ? ns_capable_common+0x93/0x100 [ 92.759023][ T9573] ? ns_capable+0x20/0x30 [ 92.763338][ T9573] ? __netlink_ns_capable+0x104/0x140 [ 92.768703][ T9573] nfnetlink_rcv+0x1ba/0x460 [ 92.773331][ T9573] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 92.778798][ T9573] ? netlink_deliver_tap+0x24a/0xbe0 [ 92.784592][ T9573] ? __kasan_check_write+0x14/0x20 [ 92.789687][ T9573] netlink_unicast+0x58c/0x7d0 [ 92.794444][ T9573] ? netlink_attachskb+0x870/0x870 [ 92.799535][ T9573] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 92.805238][ T9573] ? __check_object_size+0x3d/0x437 [ 92.810504][ T9573] netlink_sendmsg+0x91c/0xea0 [ 92.815255][ T9573] ? netlink_unicast+0x7d0/0x7d0 [ 92.820180][ T9573] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 92.825702][ T9573] ? apparmor_socket_sendmsg+0x2a/0x30 [ 92.831145][ T9573] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.837369][ T9573] ? security_socket_sendmsg+0x8d/0xc0 [ 92.842809][ T9573] ? netlink_unicast+0x7d0/0x7d0 [ 92.847726][ T9573] sock_sendmsg+0xd7/0x130 [ 92.852828][ T9573] ____sys_sendmsg+0x753/0x880 [ 92.857585][ T9573] ? kernel_sendmsg+0x50/0x50 [ 92.862241][ T9573] ? lockdep_init_map+0x1be/0x6d0 [ 92.867431][ T9573] ___sys_sendmsg+0x100/0x170 [ 92.872089][ T9573] ? sendmsg_copy_msghdr+0x70/0x70 [ 92.877175][ T9573] ? __kasan_check_read+0x11/0x20 [ 92.882173][ T9573] ? __lock_acquire+0x8a0/0x4a00 [ 92.887099][ T9573] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.893319][ T9573] ? __this_cpu_preempt_check+0x35/0x190 [ 92.898930][ T9573] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.905172][ T9573] ? percpu_counter_add_batch+0x13c/0x190 [ 92.910888][ T9573] ? __fd_install+0x1bc/0x640 [ 92.915560][ T9573] ? find_held_lock+0x35/0x130 [ 92.920311][ T9573] ? __fd_install+0x1bc/0x640 [ 92.924977][ T9573] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.931203][ T9573] ? __fget_light+0x1a9/0x230 [ 92.935863][ T9573] ? __fdget+0x1b/0x20 [ 92.939935][ T9573] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.946163][ T9573] __sys_sendmsg+0x105/0x1d0 [ 92.950741][ T9573] ? __sys_sendmsg_sock+0xc0/0xc0 [ 92.955758][ T9573] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.961382][ T9573] ? do_syscall_64+0x26/0x790 [ 92.966038][ T9573] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.972200][ T9573] ? do_syscall_64+0x26/0x790 [ 92.976868][ T9573] __x64_sys_sendmsg+0x78/0xb0 [ 92.981623][ T9573] do_syscall_64+0xfa/0x790 [ 92.986105][ T9573] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.991982][ T9573] RIP: 0033:0x440899 [ 92.995859][ T9573] 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 [ 93.015537][ T9573] RSP: 002b:00007ffc356f7138 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 93.023946][ T9573] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440899 [ 93.031906][ T9573] RDX: 000000000c0000c4 RSI: 0000000020000280 RDI: 0000000000000004 [ 93.040240][ T9573] RBP: 00000000006ca018 R08: 0000000000000015 R09: 00000000004002c8 [ 93.048193][ T9573] R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000402120 [ 93.056144][ T9573] R13: 00000000004021b0 R14: 0000000000000000 R15: 0000000000000000 [ 93.064186][ T9573] Modules linked in: [ 93.068110][ T9573] ---[ end trace 9b7238bdaff35744 ]--- [ 93.073667][ T9573] RIP: 0010:hash_ipportnet4_uadt+0x20b/0x13e0 [ 93.079819][ T9573] 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 [ 93.099504][ T9573] RSP: 0018:ffffc90001d47150 EFLAGS: 00010246 [ 93.105593][ T9573] RAX: dffffc0000000000 RBX: ffffc90001d47320 RCX: 0000000000000000 [ 93.113581][ T9573] RDX: 0000000000000000 RSI: ffffffff867e1e88 RDI: ffff8880a7999ca0 [ 93.121575][ T9573] RBP: ffffc90001d472b8 R08: 0000000000000000 R09: 0000000000000000 [ 93.129541][ T9573] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 93.137539][ T9573] R13: 0000000004000000 R14: ffffc90001d47220 R15: ffff8880a8ff3000 [ 93.145613][ T9573] FS: 00000000018b4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 93.154550][ T9573] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.161151][ T9573] CR2: 0000000020000086 CR3: 00000000a8e9c000 CR4: 00000000001406f0 [ 93.169105][ T9573] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.177088][ T9573] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.185090][ T9573] Kernel panic - not syncing: Fatal exception in interrupt [ 93.193697][ T9573] Kernel Offset: disabled [ 93.198019][ T9573] Rebooting in 86400 seconds..