[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.246922][ T27] audit: type=1800 audit(1578411961.534:25): pid=9347 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.274928][ T27] audit: type=1800 audit(1578411961.534:26): pid=9347 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.304782][ T27] audit: type=1800 audit(1578411961.534:27): pid=9347 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 '10.128.1.4' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 89.375917][ T9502] kasan: CONFIG_KASAN_INLINE enabled [ 89.381310][ T9502] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 89.389437][ T9502] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 89.396364][ T9502] CPU: 1 PID: 9502 Comm: syz-executor627 Not tainted 5.5.0-rc4-syzkaller #0 [ 89.405007][ T9502] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.415050][ T9502] RIP: 0010:hash_mac4_uadt+0x1bc/0x470 [ 89.420532][ T9502] 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 [ 89.440117][ T9502] RSP: 0018:ffffc90001fbf1b0 EFLAGS: 00010246 [ 89.446167][ T9502] RAX: dffffc0000000000 RBX: ffffc90001fbf320 RCX: 0000000008000000 [ 89.454116][ T9502] RDX: 0000000000000000 RSI: ffffffff867f8cc5 RDI: ffff8880978db904 [ 89.462070][ T9502] RBP: ffffc90001fbf2b8 R08: 0000000000000000 R09: 0000000000000000 [ 89.470018][ T9502] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a4894d00 [ 89.477967][ T9502] R13: 1ffff920003f7e3a R14: 0000000000000000 R15: ffffc90001fbf200 [ 89.485967][ T9502] FS: 0000000002661880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 89.494876][ T9502] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.501475][ T9502] CR2: 0000000020000f98 CR3: 000000009074a000 CR4: 00000000001406e0 [ 89.509430][ T9502] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.517374][ T9502] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 89.525320][ T9502] Call Trace: [ 89.528589][ T9502] ? hash_mac_create+0x860/0x860 [ 89.533500][ T9502] ? hash_mac4_kadt+0x510/0x510 [ 89.538325][ T9502] ? nla_memcpy+0xb0/0xb0 [ 89.542633][ T9502] ? lock_acquire+0x190/0x410 [ 89.547283][ T9502] ? __kasan_check_read+0x11/0x20 [ 89.552295][ T9502] ip_set_utest+0x55b/0x890 [ 89.556798][ T9502] ? ip_set_put_byindex+0x490/0x490 [ 89.561976][ T9502] ? __mutex_lock+0x458/0x13c0 [ 89.566737][ T9502] ? ip_set_put_byindex+0x490/0x490 [ 89.571914][ T9502] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 89.576828][ T9502] ? nfnetlink_bind+0x2c0/0x2c0 [ 89.581654][ T9502] ? __kasan_check_read+0x11/0x20 [ 89.586657][ T9502] ? __lock_acquire+0x8a0/0x4a00 [ 89.591577][ T9502] ? save_stack+0x5c/0x90 [ 89.595897][ T9502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.602122][ T9502] ? apparmor_capable+0x497/0x900 [ 89.607124][ T9502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.613338][ T9502] ? __kasan_check_read+0x11/0x20 [ 89.618338][ T9502] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 89.623769][ T9502] netlink_rcv_skb+0x177/0x450 [ 89.628513][ T9502] ? nfnetlink_bind+0x2c0/0x2c0 [ 89.633339][ T9502] ? netlink_ack+0xb50/0xb50 [ 89.637902][ T9502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.644118][ T9502] ? ns_capable_common+0x93/0x100 [ 89.649118][ T9502] ? ns_capable+0x20/0x30 [ 89.653423][ T9502] ? __netlink_ns_capable+0x104/0x140 [ 89.658776][ T9502] nfnetlink_rcv+0x1ba/0x460 [ 89.663341][ T9502] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 89.668779][ T9502] ? netlink_deliver_tap+0x24a/0xbe0 [ 89.674048][ T9502] ? __kasan_check_write+0x14/0x20 [ 89.679135][ T9502] netlink_unicast+0x58c/0x7d0 [ 89.683874][ T9502] ? netlink_attachskb+0x870/0x870 [ 89.688960][ T9502] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 89.694655][ T9502] ? __check_object_size+0x3d/0x437 [ 89.699837][ T9502] netlink_sendmsg+0x91c/0xea0 [ 89.704577][ T9502] ? netlink_unicast+0x7d0/0x7d0 [ 89.709496][ T9502] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 89.715016][ T9502] ? apparmor_socket_sendmsg+0x2a/0x30 [ 89.720449][ T9502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.726665][ T9502] ? security_socket_sendmsg+0x8d/0xc0 [ 89.732094][ T9502] ? netlink_unicast+0x7d0/0x7d0 [ 89.737015][ T9502] sock_sendmsg+0xd7/0x130 [ 89.741408][ T9502] ____sys_sendmsg+0x753/0x880 [ 89.746160][ T9502] ? kernel_sendmsg+0x50/0x50 [ 89.750812][ T9502] ? lockdep_init_map+0x1be/0x6d0 [ 89.755814][ T9502] ___sys_sendmsg+0x100/0x170 [ 89.760467][ T9502] ? sendmsg_copy_msghdr+0x70/0x70 [ 89.765565][ T9502] ? __kasan_check_read+0x11/0x20 [ 89.770564][ T9502] ? __lock_acquire+0x8a0/0x4a00 [ 89.775479][ T9502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.781694][ T9502] ? __this_cpu_preempt_check+0x35/0x190 [ 89.787301][ T9502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.793513][ T9502] ? percpu_counter_add_batch+0x13c/0x190 [ 89.799211][ T9502] ? __fd_install+0x1bc/0x640 [ 89.803860][ T9502] ? find_held_lock+0x35/0x130 [ 89.808602][ T9502] ? __fd_install+0x1bc/0x640 [ 89.813258][ T9502] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.819471][ T9502] ? __fget_light+0x1a9/0x230 [ 89.824131][ T9502] ? __fdget+0x1b/0x20 [ 89.828173][ T9502] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 89.834388][ T9502] __sys_sendmsg+0x105/0x1d0 [ 89.838953][ T9502] ? __sys_sendmsg_sock+0xc0/0xc0 [ 89.843957][ T9502] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 89.849390][ T9502] ? do_syscall_64+0x26/0x790 [ 89.854052][ T9502] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.860094][ T9502] ? do_syscall_64+0x26/0x790 [ 89.864746][ T9502] __x64_sys_sendmsg+0x78/0xb0 [ 89.869491][ T9502] do_syscall_64+0xfa/0x790 [ 89.873971][ T9502] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.879837][ T9502] RIP: 0033:0x440b89 [ 89.883707][ T9502] 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 [ 89.903296][ T9502] RSP: 002b:00007ffd28ae8658 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 89.911680][ T9502] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440b89 [ 89.919638][ T9502] RDX: 0000000000000800 RSI: 00000000200001c0 RDI: 0000000000000004 [ 89.927585][ T9502] RBP: 00000000006cb018 R08: 0000000000000009 R09: 00000000004002c8 [ 89.935531][ T9502] R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000402410 [ 89.943475][ T9502] R13: 00000000004024a0 R14: 0000000000000000 R15: 0000000000000000 [ 89.951421][ T9502] Modules linked in: [ 89.955342][ T9502] ---[ end trace 0178b58b9257a57d ]--- [ 89.960800][ T9502] RIP: 0010:hash_mac4_uadt+0x1bc/0x470 [ 89.966270][ T9502] 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 [ 89.985897][ T9502] RSP: 0018:ffffc90001fbf1b0 EFLAGS: 00010246 [ 89.991945][ T9502] RAX: dffffc0000000000 RBX: ffffc90001fbf320 RCX: 0000000008000000 [ 89.999946][ T9502] RDX: 0000000000000000 RSI: ffffffff867f8cc5 RDI: ffff8880978db904 [ 90.007938][ T9502] RBP: ffffc90001fbf2b8 R08: 0000000000000000 R09: 0000000000000000 [ 90.015972][ T9502] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a4894d00 [ 90.023935][ T9502] R13: 1ffff920003f7e3a R14: 0000000000000000 R15: ffffc90001fbf200 [ 90.031943][ T9502] FS: 0000000002661880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 90.040881][ T9502] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 90.047469][ T9502] CR2: 0000000020000f98 CR3: 000000009074a000 CR4: 00000000001406e0 [ 90.055447][ T9502] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 90.063396][ T9502] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 90.071376][ T9502] Kernel panic - not syncing: Fatal exception in interrupt [ 90.079916][ T9502] Kernel Offset: disabled [ 90.084235][ T9502] Rebooting in 86400 seconds..