[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 88.182151][ T26] audit: type=1800 audit(1580076664.320:25): pid=9483 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 88.207559][ T26] audit: type=1800 audit(1580076664.330:26): pid=9483 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 88.256237][ T26] audit: type=1800 audit(1580076664.330:27): pid=9483 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 '10.128.0.147' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 99.200750][ T9638] kasan: CONFIG_KASAN_INLINE enabled [ 99.206435][ T9638] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 99.215697][ T9638] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 99.223049][ T9638] CPU: 0 PID: 9638 Comm: syz-executor849 Not tainted 5.5.0-rc7-syzkaller #0 [ 99.232194][ T9638] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.243000][ T9638] RIP: 0010:strlen+0x1f/0xa0 [ 99.247676][ T9638] Code: 00 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24 [ 99.268568][ T9638] RSP: 0018:ffffc90007536e90 EFLAGS: 00010286 [ 99.274633][ T9638] RAX: dffffc0000000000 RBX: ffff8880955c6818 RCX: 1ffffffff14f9896 [ 99.283177][ T9638] RDX: 00000000000000c3 RSI: ffffffff86793821 RDI: 0000000000000618 [ 99.291406][ T9638] RBP: ffffc90007536ea8 R08: ffff88808bc76600 R09: ffffed1012ab8d03 [ 99.299716][ T9638] R10: ffffed1012ab8d02 R11: ffff8880955c6817 R12: 0000000000000618 [ 99.307775][ T9638] R13: 0000000000000608 R14: ffff8880a48e2600 R15: ffff8880955c6800 [ 99.316072][ T9638] FS: 00000000010f3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 99.325501][ T9638] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.332996][ T9638] CR2: 000055b1af9850f0 CR3: 000000009392d000 CR4: 00000000001406f0 [ 99.341144][ T9638] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 99.349568][ T9638] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 99.357627][ T9638] Call Trace: [ 99.361100][ T9638] ip_set_comment_free+0x69/0xe0 [ 99.366221][ T9638] hash_net4_add+0x1b9a/0x2200 [ 99.371144][ T9638] ? swapgs_restore_regs_and_return_to_usermode+0x3c/0x40 [ 99.378664][ T9638] hash_net4_uadt+0x596/0x940 [ 99.384067][ T9638] ? hash_net4_head+0x730/0x730 [ 99.389010][ T9638] ? hash_net6_uadt+0x880/0x880 [ 99.394112][ T9638] call_ad+0x1a0/0x5a0 [ 99.398173][ T9638] ? start_msg+0x220/0x220 [ 99.402871][ T9638] ? nla_memcpy+0xb0/0xb0 [ 99.407199][ T9638] ? __nla_parse+0x43/0x60 [ 99.412169][ T9638] ip_set_ad.isra.0+0x572/0xb20 [ 99.417119][ T9638] ? ip_set_nfnl_get_byindex+0x460/0x460 [ 99.423154][ T9638] ? nla_memcpy+0xb0/0xb0 [ 99.427782][ T9638] ? lock_downgrade+0x920/0x920 [ 99.432802][ T9638] ip_set_uadd+0x37/0x50 [ 99.437123][ T9638] ? ip_set_udel+0x50/0x50 [ 99.441714][ T9638] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 99.447554][ T9638] ? nfnetlink_bind+0x2c0/0x2c0 [ 99.452498][ T9638] ? __kasan_check_read+0x11/0x20 [ 99.457791][ T9638] ? __lock_acquire+0x8a0/0x4a00 [ 99.462901][ T9638] ? save_stack+0x5c/0x90 [ 99.467254][ T9638] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.473686][ T9638] ? apparmor_capable+0x497/0x900 [ 99.478812][ T9638] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.485209][ T9638] ? __kasan_check_read+0x11/0x20 [ 99.490499][ T9638] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 99.496044][ T9638] netlink_rcv_skb+0x177/0x450 [ 99.500814][ T9638] ? nfnetlink_bind+0x2c0/0x2c0 [ 99.505670][ T9638] ? netlink_ack+0xb50/0xb50 [ 99.510258][ T9638] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.516550][ T9638] ? ns_capable_common+0x93/0x100 [ 99.522112][ T9638] ? ns_capable+0x20/0x30 [ 99.526682][ T9638] ? __netlink_ns_capable+0x104/0x140 [ 99.532604][ T9638] nfnetlink_rcv+0x1ba/0x460 [ 99.537796][ T9638] ? nfnetlink_rcv_batch+0x17b0/0x17b0 [ 99.543605][ T9638] ? netlink_deliver_tap+0x24a/0xbf0 [ 99.549050][ T9638] ? __kasan_check_write+0x14/0x20 [ 99.554660][ T9638] netlink_unicast+0x59e/0x7e0 [ 99.559599][ T9638] ? netlink_attachskb+0x870/0x870 [ 99.564892][ T9638] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 99.570717][ T9638] ? __check_object_size+0x3d/0x437 [ 99.576242][ T9638] netlink_sendmsg+0x91c/0xea0 [ 99.581281][ T9638] ? netlink_unicast+0x7e0/0x7e0 [ 99.586439][ T9638] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 99.592560][ T9638] ? apparmor_socket_sendmsg+0x2a/0x30 [ 99.598252][ T9638] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.605071][ T9638] ? security_socket_sendmsg+0x8d/0xc0 [ 99.611149][ T9638] ? netlink_unicast+0x7e0/0x7e0 [ 99.616498][ T9638] sock_sendmsg+0xd7/0x130 [ 99.621815][ T9638] ____sys_sendmsg+0x753/0x880 [ 99.626770][ T9638] ? kernel_sendmsg+0x50/0x50 [ 99.631842][ T9638] ? lockdep_init_map+0x1be/0x6d0 [ 99.636864][ T9638] ___sys_sendmsg+0x100/0x170 [ 99.642089][ T9638] ? sendmsg_copy_msghdr+0x70/0x70 [ 99.647196][ T9638] ? __kasan_check_read+0x11/0x20 [ 99.652670][ T9638] ? __lock_acquire+0x8a0/0x4a00 [ 99.658049][ T9638] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.664902][ T9638] ? __this_cpu_preempt_check+0x35/0x190 [ 99.670710][ T9638] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.677610][ T9638] ? percpu_counter_add_batch+0x13c/0x190 [ 99.683634][ T9638] ? __fd_install+0x1bc/0x640 [ 99.688868][ T9638] ? find_held_lock+0x35/0x130 [ 99.694410][ T9638] ? __fd_install+0x1bc/0x640 [ 99.699601][ T9638] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.706374][ T9638] ? __fget_light+0x1a9/0x230 [ 99.711755][ T9638] ? __fdget+0x1b/0x20 [ 99.716910][ T9638] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 99.723678][ T9638] __sys_sendmsg+0x105/0x1d0 [ 99.728776][ T9638] ? __sys_sendmsg_sock+0xc0/0xc0 [ 99.734524][ T9638] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.739991][ T9638] ? do_syscall_64+0x26/0x790 [ 99.744991][ T9638] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.751197][ T9638] ? do_syscall_64+0x26/0x790 [ 99.756217][ T9638] __x64_sys_sendmsg+0x78/0xb0 [ 99.762248][ T9638] do_syscall_64+0xfa/0x790 [ 99.766889][ T9638] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.773064][ T9638] RIP: 0033:0x4406b9 [ 99.777207][ T9638] Code: 23 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 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 9b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 99.798077][ T9638] RSP: 002b:00007ffd70454b68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 99.806818][ T9638] RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00000000004406b9 [ 99.815735][ T9638] RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000004 [ 99.824458][ T9638] RBP: 00000000006cb018 R08: 0000000000000008 R09: 6c616b7a79732f2e [ 99.832673][ T9638] R10: 000000000000000c R11: 0000000000000246 R12: 0000000000401ee0 [ 99.840982][ T9638] R13: 0000000000401f70 R14: 0000000000000000 R15: 0000000000000000 [ 99.849179][ T9638] Modules linked in: [ 99.853162][ T9638] ---[ end trace 8f4d815c25aed79d ]--- [ 99.859019][ T9638] RIP: 0010:strlen+0x1f/0xa0 [ 99.863977][ T9638] Code: 00 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c 24 [ 99.884273][ T9638] RSP: 0018:ffffc90007536e90 EFLAGS: 00010286 [ 99.890589][ T9638] RAX: dffffc0000000000 RBX: ffff8880955c6818 RCX: 1ffffffff14f9896 [ 99.899117][ T9638] RDX: 00000000000000c3 RSI: ffffffff86793821 RDI: 0000000000000618 [ 99.907437][ T9638] RBP: ffffc90007536ea8 R08: ffff88808bc76600 R09: ffffed1012ab8d03 [ 99.915588][ T9638] R10: ffffed1012ab8d02 R11: ffff8880955c6817 R12: 0000000000000618 [ 99.925597][ T9638] R13: 0000000000000608 R14: ffff8880a48e2600 R15: ffff8880955c6800 [ 99.937118][ T9638] FS: 00000000010f3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 99.951259][ T9638] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.958721][ T9638] CR2: 000055b1af9850f0 CR3: 000000009392d000 CR4: 00000000001406f0 [ 99.969442][ T9638] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 99.980255][ T9638] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 99.993636][ T9638] Kernel panic - not syncing: Fatal exception in interrupt [ 100.005205][ T9638] Kernel Offset: disabled [ 100.012302][ T9638] Rebooting in 86400 seconds..