[ 34.476836][ T26] audit: type=1800 audit(1553057745.551:27): pid=7388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 34.581468][ T26] audit: type=1800 audit(1553057745.681:28): pid=7388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 35.414742][ T26] audit: type=1800 audit(1553057746.511:29): pid=7388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 35.438170][ T26] audit: type=1800 audit(1553057746.511:30): pid=7388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.168' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.670341][ T7542] kasan: CONFIG_KASAN_INLINE enabled [ 45.675770][ T7542] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.683873][ T7542] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.690942][ T7542] CPU: 0 PID: 7542 Comm: syz-executor027 Not tainted 5.0.0+ #61 [ 45.698547][ T7542] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.708595][ T7542] RIP: 0010:tipc_mcast_filter_msg+0x21b/0x13d0 [ 45.714727][ T7542] Code: 45 c0 0f 84 39 06 00 00 48 89 5d 98 e8 ce ab a5 fa 49 8d bc 24 c8 00 00 00 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 9a 0e 00 00 49 8b 9c 24 c8 00 00 00 48 be 00 00 [ 45.734314][ T7542] RSP: 0018:ffff888091a5efc8 EFLAGS: 00010202 [ 45.740449][ T7542] RAX: 0000000000000019 RBX: ffff888093d9f308 RCX: dffffc0000000000 [ 45.748744][ T7542] RDX: 0000000000000000 RSI: ffffffff86cab862 RDI: 00000000000000c8 [ 45.756693][ T7542] RBP: ffff888091a5f030 R08: ffff888095ca60c0 R09: ffffed1015d05bc8 [ 45.764641][ T7542] R10: ffffed1015d05bc7 R11: ffff8880ae82de3b R12: 0000000000000000 [ 45.772597][ T7542] R13: 000000000000002c R14: 0000000000000000 R15: ffff888093d9f308 [ 45.780564][ T7542] FS: 00000000023a8880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 45.790144][ T7542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.796724][ T7542] CR2: 0000000020000000 CR3: 00000000a48ee000 CR4: 00000000001406f0 [ 45.804849][ T7542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.812826][ T7542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.820777][ T7542] Call Trace: [ 45.824064][ T7542] tipc_sk_filter_rcv+0x182d/0x34f0 [ 45.829275][ T7542] ? tipc_sk_overlimit2+0xa0/0xa0 [ 45.834304][ T7542] ? __local_bh_enable_ip+0x15a/0x270 [ 45.839657][ T7542] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 45.844917][ T7542] ? tipc_sk_rcv+0x562/0x25a0 [ 45.849571][ T7542] ? __local_bh_enable_ip+0x15a/0x270 [ 45.854918][ T7542] tipc_sk_rcv+0xc45/0x25a0 [ 45.859396][ T7542] ? lock_downgrade+0x880/0x880 [ 45.864238][ T7542] ? tipc_sk_filter_rcv+0x34f0/0x34f0 [ 45.869593][ T7542] ? find_held_lock+0x35/0x130 [ 45.874333][ T7542] ? __local_bh_enable_ip+0x15a/0x270 [ 45.879679][ T7542] ? lockdep_hardirqs_on+0x418/0x5d0 [ 45.884939][ T7542] ? tipc_sk_mcast_rcv+0x70c/0x1020 [ 45.890115][ T7542] ? trace_hardirqs_on+0x67/0x230 [ 45.895131][ T7542] ? tipc_sk_mcast_rcv+0x70c/0x1020 [ 45.900329][ T7542] ? __local_bh_enable_ip+0x15a/0x270 [ 45.905681][ T7542] tipc_sk_mcast_rcv+0x724/0x1020 [ 45.910682][ T7542] ? tipc_sk_rcv+0x25a0/0x25a0 [ 45.915441][ T7542] ? tipc_msg_reassemble+0x29d/0x570 [ 45.920705][ T7542] ? tipc_msg_build+0x1250/0x1250 [ 45.925709][ T7542] ? lockdep_init_map+0x1be/0x6d0 [ 45.930717][ T7542] tipc_mcast_xmit+0x7fe/0x1200 [ 45.935551][ T7542] ? tipc_bcast_dec_bearer_dst_cnt+0x850/0x850 [ 45.941778][ T7542] tipc_sendmcast+0xb36/0xfc0 [ 45.946442][ T7542] ? tipc_poll+0x7a0/0x7a0 [ 45.950843][ T7542] ? lock_downgrade+0x880/0x880 [ 45.955669][ T7542] ? do_wait_intr_irq+0x2b0/0x2b0 [ 45.960680][ T7542] ? __bfs+0x28/0x590 [ 45.964650][ T7542] ? check_usage_backwards+0x127/0x360 [ 45.970094][ T7542] ? __kernel_text_address+0xd/0x40 [ 45.975270][ T7542] ? print_shortest_lock_dependencies+0x90/0x90 [ 45.981492][ T7542] __tipc_sendmsg+0x10df/0x18d0 [ 45.986334][ T7542] ? __tipc_sendmsg+0x10df/0x18d0 [ 45.991365][ T7542] ? tipc_sendmcast+0xfc0/0xfc0 [ 45.996284][ T7542] ? kasan_check_read+0x11/0x20 [ 46.001113][ T7542] ? mark_lock+0x542/0x1380 [ 46.005594][ T7542] ? print_shortest_lock_dependencies+0x90/0x90 [ 46.011809][ T7542] ? mark_held_locks+0xa4/0xf0 [ 46.016557][ T7542] ? __local_bh_enable_ip+0x15a/0x270 [ 46.021905][ T7542] ? lock_sock_nested+0xe2/0x120 [ 46.026818][ T7542] ? __local_bh_enable_ip+0x15a/0x270 [ 46.032166][ T7542] ? lockdep_hardirqs_on+0x418/0x5d0 [ 46.037452][ T7542] ? lock_sock_nested+0x9a/0x120 [ 46.042369][ T7542] ? trace_hardirqs_on+0x67/0x230 [ 46.047389][ T7542] ? lock_sock_nested+0x9a/0x120 [ 46.052464][ T7542] ? __local_bh_enable_ip+0x15a/0x270 [ 46.057818][ T7542] tipc_sendmsg+0x53/0x80 [ 46.062128][ T7542] ? __tipc_sendmsg+0x18d0/0x18d0 [ 46.067127][ T7542] sock_sendmsg+0xdd/0x130 [ 46.071520][ T7542] ___sys_sendmsg+0x806/0x930 [ 46.076174][ T7542] ? copy_msghdr_from_user+0x430/0x430 [ 46.081610][ T7542] ? __lock_acquire+0x548/0x3fb0 [ 46.086544][ T7542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.092880][ T7542] ? __this_cpu_preempt_check+0x3a/0x270 [ 46.098492][ T7542] ? __fd_install+0x1bc/0x640 [ 46.103173][ T7542] ? find_held_lock+0x35/0x130 [ 46.107942][ T7542] ? __fd_install+0x1bc/0x640 [ 46.112611][ T7542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.118831][ T7542] ? __fget_light+0x1a9/0x230 [ 46.123503][ T7542] ? __fdget+0x1b/0x20 [ 46.127557][ T7542] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.133791][ T7542] __sys_sendmsg+0x105/0x1d0 [ 46.138383][ T7542] ? __ia32_sys_shutdown+0x80/0x80 [ 46.143484][ T7542] ? __sys_socketpair+0x43f/0x5e0 [ 46.148488][ T7542] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 46.153937][ T7542] ? do_syscall_64+0x26/0x610 [ 46.158597][ T7542] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.164658][ T7542] ? do_syscall_64+0x26/0x610 [ 46.169410][ T7542] __x64_sys_sendmsg+0x78/0xb0 [ 46.174165][ T7542] do_syscall_64+0x103/0x610 [ 46.178737][ T7542] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.184605][ T7542] RIP: 0033:0x4401c9 [ 46.188491][ T7542] 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 [ 46.208073][ T7542] RSP: 002b:00007ffebe312aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.216462][ T7542] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401c9 [ 46.224530][ T7542] RDX: 0000000000000000 RSI: 0000000020001900 RDI: 0000000000000004 [ 46.232485][ T7542] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 46.240435][ T7542] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a50 [ 46.248387][ T7542] R13: 0000000000401ae0 R14: 0000000000000000 R15: 0000000000000000 [ 46.256355][ T7542] Modules linked in: [ 46.260292][ T7542] ---[ end trace 2085b556f844c8c3 ]--- [ 46.265772][ T7542] RIP: 0010:tipc_mcast_filter_msg+0x21b/0x13d0 [ 46.271964][ T7542] Code: 45 c0 0f 84 39 06 00 00 48 89 5d 98 e8 ce ab a5 fa 49 8d bc 24 c8 00 00 00 48 b9 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 9a 0e 00 00 49 8b 9c 24 c8 00 00 00 48 be 00 00 [ 46.291585][ T7542] RSP: 0018:ffff888091a5efc8 EFLAGS: 00010202 [ 46.297669][ T7542] RAX: 0000000000000019 RBX: ffff888093d9f308 RCX: dffffc0000000000 [ 46.305632][ T7542] RDX: 0000000000000000 RSI: ffffffff86cab862 RDI: 00000000000000c8 [ 46.313754][ T7542] RBP: ffff888091a5f030 R08: ffff888095ca60c0 R09: ffffed1015d05bc8 [ 46.323561][ T7542] R10: ffffed1015d05bc7 R11: ffff8880ae82de3b R12: 0000000000000000 [ 46.331681][ T7542] R13: 000000000000002c R14: 0000000000000000 R15: ffff888093d9f308 [ 46.339771][ T7542] FS: 00000000023a8880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 46.349668][ T7542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.356243][ T7542] CR2: 0000000020000000 CR3: 00000000a48ee000 CR4: 00000000001406f0 [ 46.364234][ T7542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.372332][ T7542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.380325][ T7542] Kernel panic - not syncing: Fatal exception in interrupt [ 46.388735][ T7542] Kernel Offset: disabled [ 46.393055][ T7542] Rebooting in 86400 seconds..