[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.755812][ T26] audit: type=1800 audit(1578437536.402:25): pid=9606 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.775728][ T26] audit: type=1800 audit(1578437536.402:26): pid=9606 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.831535][ T26] audit: type=1800 audit(1578437536.412:27): pid=9606 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 '10.128.0.115' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 79.449536][ T9761] kasan: CONFIG_KASAN_INLINE enabled [ 79.454993][ T9761] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 79.463039][ T9761] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 79.469953][ T9761] CPU: 1 PID: 9761 Comm: syz-executor783 Not tainted 5.5.0-rc5-syzkaller #0 [ 79.478602][ T9761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.488811][ T9761] RIP: 0010:hash_mac4_uadt+0x1bc/0x470 [ 79.494336][ T9761] Code: 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 5c 02 00 00 4c 89 f2 8b 48 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1a [ 79.513926][ T9761] RSP: 0018:ffffc90001d271a0 EFLAGS: 00010246 [ 79.519967][ T9761] RAX: dffffc0000000000 RBX: ffffc90001d27310 RCX: 0000000008000000 [ 79.527930][ T9761] RDX: 0000000000000000 RSI: ffffffff867f8cd5 RDI: ffff8880a48e1104 [ 79.535893][ T9761] RBP: ffffc90001d272a8 R08: 0000000000000000 R09: 0000000000000000 [ 79.543845][ T9761] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a65dc200 [ 79.551820][ T9761] R13: 1ffff920003a4e38 R14: 0000000000000000 R15: ffffc90001d271f0 [ 79.559905][ T9761] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:0000000008b6d840 [ 79.568813][ T9761] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 79.575373][ T9761] CR2: 0000000020000f86 CR3: 00000000a84de000 CR4: 00000000001406e0 [ 79.583327][ T9761] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.591279][ T9761] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.599225][ T9761] Call Trace: [ 79.602497][ T9761] ? hash_mac_create+0x860/0x860 [ 79.607411][ T9761] ? hash_mac4_kadt+0x510/0x510 [ 79.612236][ T9761] ? nla_memcpy+0xb0/0xb0 [ 79.616546][ T9761] ? lock_acquire+0x190/0x410 [ 79.621200][ T9761] ? __kasan_check_read+0x11/0x20 [ 79.626201][ T9761] ip_set_utest+0x55b/0x890 [ 79.630688][ T9761] ? ip_set_put_byindex+0x490/0x490 [ 79.635886][ T9761] ? __mutex_lock+0x458/0x13c0 [ 79.640635][ T9761] ? ip_set_put_byindex+0x490/0x490 [ 79.645822][ T9761] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 79.650755][ T9761] ? nfnetlink_bind+0x2c0/0x2c0 [ 79.655598][ T9761] ? __kasan_check_read+0x11/0x20 [ 79.660606][ T9761] ? __lock_acquire+0x8a0/0x4a00 [ 79.665534][ T9761] ? save_stack+0x5c/0x90 [ 79.669880][ T9761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.676100][ T9761] ? apparmor_capable+0x497/0x900 [ 79.681103][ T9761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.687320][ T9761] ? __kasan_check_read+0x11/0x20 [ 79.692318][ T9761] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 79.697771][ T9761] netlink_rcv_skb+0x177/0x450 [ 79.702513][ T9761] ? nfnetlink_bind+0x2c0/0x2c0 [ 79.707341][ T9761] ? netlink_ack+0xb50/0xb50 [ 79.711921][ T9761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.718155][ T9761] ? ns_capable_common+0x93/0x100 [ 79.723176][ T9761] ? ns_capable+0x20/0x30 [ 79.727484][ T9761] ? __netlink_ns_capable+0x104/0x140 [ 79.732835][ T9761] nfnetlink_rcv+0x1ba/0x460 [ 79.737402][ T9761] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 79.742947][ T9761] ? netlink_deliver_tap+0x24a/0xbe0 [ 79.748207][ T9761] ? __kasan_check_write+0x14/0x20 [ 79.753294][ T9761] netlink_unicast+0x58c/0x7d0 [ 79.758035][ T9761] ? netlink_attachskb+0x870/0x870 [ 79.763126][ T9761] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 79.768836][ T9761] ? __check_object_size+0x3d/0x437 [ 79.774017][ T9761] netlink_sendmsg+0x91c/0xea0 [ 79.778758][ T9761] ? netlink_unicast+0x7d0/0x7d0 [ 79.783671][ T9761] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 79.789191][ T9761] ? apparmor_socket_sendmsg+0x2a/0x30 [ 79.794627][ T9761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.800842][ T9761] ? security_socket_sendmsg+0x8d/0xc0 [ 79.806275][ T9761] ? netlink_unicast+0x7d0/0x7d0 [ 79.811186][ T9761] sock_sendmsg+0xd7/0x130 [ 79.815581][ T9761] ____sys_sendmsg+0x753/0x880 [ 79.820324][ T9761] ? kernel_sendmsg+0x50/0x50 [ 79.824987][ T9761] ? lockdep_init_map+0x1be/0x6d0 [ 79.830003][ T9761] ___sys_sendmsg+0x100/0x170 [ 79.834659][ T9761] ? sendmsg_copy_msghdr+0x70/0x70 [ 79.839746][ T9761] ? __kasan_check_read+0x11/0x20 [ 79.844758][ T9761] ? __lock_acquire+0x8a0/0x4a00 [ 79.849685][ T9761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.855903][ T9761] ? __this_cpu_preempt_check+0x35/0x190 [ 79.861511][ T9761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.867725][ T9761] ? percpu_counter_add_batch+0x13c/0x190 [ 79.873419][ T9761] ? __fd_install+0x1bc/0x640 [ 79.878070][ T9761] ? find_held_lock+0x35/0x130 [ 79.882811][ T9761] ? __fd_install+0x1bc/0x640 [ 79.887464][ T9761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.893680][ T9761] ? __fget_light+0x1a9/0x230 [ 79.898343][ T9761] ? __fdget+0x1b/0x20 [ 79.902390][ T9761] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 79.908610][ T9761] __sys_sendmsg+0x105/0x1d0 [ 79.913187][ T9761] ? __sys_sendmsg_sock+0xc0/0xc0 [ 79.918191][ T9761] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 79.923630][ T9761] ? do_fast_syscall_32+0xd1/0xe16 [ 79.928716][ T9761] ? entry_SYSENTER_compat+0x70/0x7f [ 79.933978][ T9761] ? do_fast_syscall_32+0xd1/0xe16 [ 79.939070][ T9761] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 79.944503][ T9761] do_fast_syscall_32+0x27b/0xe16 [ 79.949502][ T9761] entry_SYSENTER_compat+0x70/0x7f [ 79.954585][ T9761] RIP: 0023:0xf7f7ca39 [ 79.958630][ T9761] 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 [ 79.978210][ T9761] RSP: 002b:00000000fff59e8c EFLAGS: 00000202 ORIG_RAX: 0000000000000172 [ 79.986610][ T9761] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200001c0 [ 79.994561][ T9761] RDX: 0000000000000800 RSI: 00000000080eb080 RDI: 00000000fff59ee0 [ 80.002598][ T9761] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 80.010559][ T9761] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 80.018538][ T9761] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 80.026492][ T9761] Modules linked in: [ 80.030423][ T9761] ---[ end trace 4c6bcecbeae77c85 ]--- [ 80.035896][ T9761] RIP: 0010:hash_mac4_uadt+0x1bc/0x470 [ 80.041414][ T9761] Code: 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 5c 02 00 00 4c 89 f2 8b 48 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 1a [ 80.061058][ T9761] RSP: 0018:ffffc90001d271a0 EFLAGS: 00010246 [ 80.067136][ T9761] RAX: dffffc0000000000 RBX: ffffc90001d27310 RCX: 0000000008000000 [ 80.075117][ T9761] RDX: 0000000000000000 RSI: ffffffff867f8cd5 RDI: ffff8880a48e1104 [ 80.083080][ T9761] RBP: ffffc90001d272a8 R08: 0000000000000000 R09: 0000000000000000 [ 80.091063][ T9761] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a65dc200 [ 80.099038][ T9761] R13: 1ffff920003a4e38 R14: 0000000000000000 R15: ffffc90001d271f0 [ 80.107027][ T9761] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:0000000008b6d840 [ 80.118217][ T9761] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 80.124803][ T9761] CR2: 0000000020000f86 CR3: 00000000a84de000 CR4: 00000000001406e0 [ 80.132763][ T9761] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.140777][ T9761] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.148756][ T9761] Kernel panic - not syncing: Fatal exception in interrupt [ 80.157520][ T9761] Kernel Offset: disabled [ 80.161841][ T9761] Rebooting in 86400 seconds..