[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.901968][ T27] audit: type=1800 audit(1578421237.973:25): pid=9446 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.921834][ T27] audit: type=1800 audit(1578421237.973:26): pid=9446 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.951360][ T27] audit: type=1800 audit(1578421237.973:27): pid=9446 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 '10.128.10.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.996595][ T9598] kasan: CONFIG_KASAN_INLINE enabled [ 78.002129][ T9598] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 78.010219][ T9598] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 78.017134][ T9598] CPU: 0 PID: 9598 Comm: syz-executor083 Not tainted 5.5.0-rc4-syzkaller #0 [ 78.025781][ T9598] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.035833][ T9598] RIP: 0010:hash_mac4_uadt+0x1bc/0x470 [ 78.041293][ T9598] 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 [ 78.060897][ T9598] RSP: 0018:ffffc90001e571b0 EFLAGS: 00010246 [ 78.066943][ T9598] RAX: dffffc0000000000 RBX: ffffc90001e57320 RCX: 0000000008000000 [ 78.074911][ T9598] RDX: 0000000000000000 RSI: ffffffff868355d5 RDI: ffff888095941104 [ 78.082868][ T9598] RBP: ffffc90001e572b8 R08: 0000000000000000 R09: 0000000000000000 [ 78.090963][ T9598] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a8296c00 [ 78.098922][ T9598] R13: 1ffff920003cae3a R14: 0000000000000000 R15: ffffc90001e57200 [ 78.106876][ T9598] FS: 0000000002689880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 78.115806][ T9598] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.122369][ T9598] CR2: 0000000020000f98 CR3: 0000000095988000 CR4: 00000000001406f0 [ 78.130318][ T9598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.138277][ T9598] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.146234][ T9598] Call Trace: [ 78.149531][ T9598] ? hash_mac_create+0x860/0x860 [ 78.154472][ T9598] ? hash_mac4_kadt+0x510/0x510 [ 78.159320][ T9598] ? nla_memcpy+0xb0/0xb0 [ 78.163659][ T9598] ? lock_acquire+0x190/0x410 [ 78.168316][ T9598] ? __kasan_check_read+0x11/0x20 [ 78.173329][ T9598] ip_set_utest+0x55b/0x890 [ 78.177875][ T9598] ? ip_set_put_byindex+0x490/0x490 [ 78.183059][ T9598] ? __mutex_lock+0x458/0x13c0 [ 78.187906][ T9598] ? ip_set_put_byindex+0x490/0x490 [ 78.193081][ T9598] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 78.197998][ T9598] ? nfnetlink_bind+0x2c0/0x2c0 [ 78.202829][ T9598] ? __kasan_check_read+0x11/0x20 [ 78.207831][ T9598] ? __lock_acquire+0x8a0/0x4a00 [ 78.212746][ T9598] ? save_stack+0x5c/0x90 [ 78.217053][ T9598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.223281][ T9598] ? apparmor_capable+0x497/0x900 [ 78.228288][ T9598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.234518][ T9598] ? __kasan_check_read+0x11/0x20 [ 78.239549][ T9598] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 78.244989][ T9598] netlink_rcv_skb+0x177/0x450 [ 78.249728][ T9598] ? nfnetlink_bind+0x2c0/0x2c0 [ 78.254572][ T9598] ? netlink_ack+0xb50/0xb50 [ 78.259146][ T9598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.265370][ T9598] ? ns_capable_common+0x93/0x100 [ 78.270378][ T9598] ? ns_capable+0x20/0x30 [ 78.274716][ T9598] ? __netlink_ns_capable+0x104/0x140 [ 78.280176][ T9598] nfnetlink_rcv+0x1ba/0x460 [ 78.284752][ T9598] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 78.290193][ T9598] ? netlink_deliver_tap+0x24a/0xbe0 [ 78.295458][ T9598] ? __kasan_check_write+0x14/0x20 [ 78.300549][ T9598] netlink_unicast+0x58c/0x7d0 [ 78.305342][ T9598] ? netlink_attachskb+0x870/0x870 [ 78.310436][ T9598] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 78.316139][ T9598] ? __check_object_size+0x3d/0x437 [ 78.321330][ T9598] netlink_sendmsg+0x91c/0xea0 [ 78.326093][ T9598] ? netlink_unicast+0x7d0/0x7d0 [ 78.331195][ T9598] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 78.336750][ T9598] ? apparmor_socket_sendmsg+0x2a/0x30 [ 78.342195][ T9598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.348420][ T9598] ? security_socket_sendmsg+0x8d/0xc0 [ 78.353860][ T9598] ? netlink_unicast+0x7d0/0x7d0 [ 78.358866][ T9598] sock_sendmsg+0xd7/0x130 [ 78.363267][ T9598] ____sys_sendmsg+0x753/0x880 [ 78.368009][ T9598] ? kernel_sendmsg+0x50/0x50 [ 78.372669][ T9598] ? lockdep_init_map+0x1be/0x6d0 [ 78.377676][ T9598] ___sys_sendmsg+0x100/0x170 [ 78.382348][ T9598] ? sendmsg_copy_msghdr+0x70/0x70 [ 78.387436][ T9598] ? __kasan_check_read+0x11/0x20 [ 78.392445][ T9598] ? __lock_acquire+0x8a0/0x4a00 [ 78.397368][ T9598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.403586][ T9598] ? __this_cpu_preempt_check+0x35/0x190 [ 78.409201][ T9598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.415428][ T9598] ? percpu_counter_add_batch+0x13c/0x190 [ 78.421133][ T9598] ? __fd_install+0x1bc/0x640 [ 78.425790][ T9598] ? find_held_lock+0x35/0x130 [ 78.430613][ T9598] ? __fd_install+0x1bc/0x640 [ 78.435271][ T9598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.441487][ T9598] ? __fget_light+0x1a9/0x230 [ 78.446149][ T9598] ? __fdget+0x1b/0x20 [ 78.450194][ T9598] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 78.456410][ T9598] __sys_sendmsg+0x105/0x1d0 [ 78.461003][ T9598] ? __sys_sendmsg_sock+0xc0/0xc0 [ 78.466036][ T9598] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 78.471474][ T9598] ? do_syscall_64+0x26/0x790 [ 78.476126][ T9598] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.482170][ T9598] ? do_syscall_64+0x26/0x790 [ 78.486830][ T9598] __x64_sys_sendmsg+0x78/0xb0 [ 78.491608][ T9598] do_syscall_64+0xfa/0x790 [ 78.496091][ T9598] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.502090][ T9598] RIP: 0033:0x440b89 [ 78.505975][ T9598] 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 [ 78.525557][ T9598] RSP: 002b:00007ffdbe108cf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 78.533946][ T9598] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440b89 [ 78.541900][ T9598] RDX: 0000000000000800 RSI: 00000000200001c0 RDI: 0000000000000004 [ 78.550036][ T9598] RBP: 00000000006cb018 R08: 0000000000000009 R09: 00000000004002c8 [ 78.558089][ T9598] R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000402410 [ 78.566047][ T9598] R13: 00000000004024a0 R14: 0000000000000000 R15: 0000000000000000 [ 78.574001][ T9598] Modules linked in: [ 78.577930][ T9598] ---[ end trace 6b7e81492f73be60 ]--- [ 78.583408][ T9598] RIP: 0010:hash_mac4_uadt+0x1bc/0x470 [ 78.588933][ T9598] 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 [ 78.608552][ T9598] RSP: 0018:ffffc90001e571b0 EFLAGS: 00010246 [ 78.614638][ T9598] RAX: dffffc0000000000 RBX: ffffc90001e57320 RCX: 0000000008000000 [ 78.622615][ T9598] RDX: 0000000000000000 RSI: ffffffff868355d5 RDI: ffff888095941104 [ 78.630574][ T9598] RBP: ffffc90001e572b8 R08: 0000000000000000 R09: 0000000000000000 [ 78.638556][ T9598] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a8296c00 [ 78.646533][ T9598] R13: 1ffff920003cae3a R14: 0000000000000000 R15: ffffc90001e57200 [ 78.654540][ T9598] FS: 0000000002689880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 78.663496][ T9598] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.670061][ T9598] CR2: 0000000020000f98 CR3: 0000000095988000 CR4: 00000000001406f0 [ 78.678169][ T9598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.686179][ T9598] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.694181][ T9598] Kernel panic - not syncing: Fatal exception in interrupt [ 78.702852][ T9598] Kernel Offset: disabled [ 78.707180][ T9598] Rebooting in 86400 seconds..