[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.050457][ T26] audit: type=1800 audit(1566256779.480:25): pid=8414 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 52.085736][ T26] audit: type=1800 audit(1566256779.490:26): pid=8414 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 52.144617][ T26] audit: type=1800 audit(1566256779.490:27): pid=8414 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 '10.128.10.39' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 62.534893][ T8567] IPVS: ftp: loaded support on port[0] = 21 [ 62.591651][ T8575] ------------[ cut here ]------------ [ 62.597183][ T8575] kernel BUG at include/linux/skbuff.h:2225! [ 62.603269][ T8575] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 62.609328][ T8575] CPU: 1 PID: 8575 Comm: syz-executor067 Not tainted 5.3.0-rc3+ #139 [ 62.617359][ T8575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.627442][ T8575] RIP: 0010:skb_pull+0xea/0x110 [ 62.632272][ T8575] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c d5 dd fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 d5 dd fb <0f> 0b e8 df 03 18 fc e9 44 ff ff ff e8 d5 03 18 fc eb 8a e8 ee 03 [ 62.651851][ T8575] RSP: 0018:ffff88809893ee10 EFLAGS: 00010293 [ 62.657886][ T8575] RAX: ffff8880940bc180 RBX: 0000000000000004 RCX: ffffffff8594b3a6 [ 62.665832][ T8575] RDX: 0000000000000000 RSI: ffffffff8594b3fa RDI: 0000000000000004 [ 62.673779][ T8575] RBP: ffff88809893ee30 R08: ffff8880940bc180 R09: fffffbfff14a914f [ 62.681724][ T8575] R10: fffffbfff14a914e R11: ffffffff8a548a77 R12: 000000008e9ad98c [ 62.689669][ T8575] R13: ffff88809893f478 R14: 00000000ffff8880 R15: ffff88809893f478 [ 62.697614][ T8575] FS: 0000555556fe1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 62.706519][ T8575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.713080][ T8575] CR2: 0000000020000040 CR3: 00000000a056c000 CR4: 00000000001406e0 [ 62.721029][ T8575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.728973][ T8575] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.736917][ T8575] Call Trace: [ 62.740187][ T8575] sctp_inq_pop+0x2f1/0xd80 [ 62.744668][ T8575] sctp_endpoint_bh_rcv+0x184/0x8d0 [ 62.749851][ T8575] ? sctp_endpoint_lookup_assoc+0x290/0x290 [ 62.755717][ T8575] ? rwlock_bug.part.0+0x90/0x90 [ 62.760632][ T8575] ? lock_acquire+0x190/0x410 [ 62.765286][ T8575] sctp_inq_push+0x1e4/0x280 [ 62.769848][ T8575] sctp_rcv+0x2807/0x3590 [ 62.774165][ T8575] ? sctp_addrs_lookup_transport+0x7a0/0x7a0 [ 62.780121][ T8575] ? __kasan_check_read+0x11/0x20 [ 62.785134][ T8575] ? mark_lock+0xc0/0x11e0 [ 62.789528][ T8575] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 62.795738][ T8575] ? raw6_local_deliver+0x5f9/0xae0 [ 62.800914][ T8575] sctp6_rcv+0x17/0x30 [ 62.804960][ T8575] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 62.810567][ T8575] ip6_input_finish+0x84/0x170 [ 62.815302][ T8575] ip6_input+0xe4/0x3f0 [ 62.819432][ T8575] ? ip6_input_finish+0x170/0x170 [ 62.824428][ T8575] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 62.830297][ T8575] ip6_sublist_rcv_finish+0x98/0x1e0 [ 62.835553][ T8575] ip6_sublist_rcv+0x80c/0xcf0 [ 62.840293][ T8575] ? ip6_rcv_finish+0x2f0/0x2f0 [ 62.845122][ T8575] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 62.850987][ T8575] ? ip6_rcv_core.isra.0+0x1011/0x1bb0 [ 62.856418][ T8575] ipv6_list_rcv+0x373/0x4b0 [ 62.860981][ T8575] ? ipv6_rcv+0x420/0x420 [ 62.865283][ T8575] ? ipv6_rcv+0x420/0x420 [ 62.869584][ T8575] __netif_receive_skb_list_core+0x5fc/0x9d0 [ 62.875626][ T8575] ? ktime_get_with_offset+0x13a/0x350 [ 62.881182][ T8575] ? ktime_get_with_offset+0x13a/0x350 [ 62.886618][ T8575] ? process_backlog+0x750/0x750 [ 62.891541][ T8575] ? lock_acquire+0x190/0x410 [ 62.896193][ T8575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.902405][ T8575] ? __kasan_check_read+0x11/0x20 [ 62.907402][ T8575] netif_receive_skb_list_internal+0x7eb/0xe60 [ 62.913529][ T8575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.919826][ T8575] ? __netif_receive_skb_list_core+0x9d0/0x9d0 [ 62.925953][ T8575] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 62.932177][ T8575] ? eth_gro_receive+0x890/0x890 [ 62.937087][ T8575] gro_normal_list.part.0+0x1e/0xb0 [ 62.942257][ T8575] napi_gro_frags+0xa6a/0xea0 [ 62.946906][ T8575] tun_get_user+0x2e98/0x3fa0 [ 62.951556][ T8575] ? __kasan_check_read+0x11/0x20 [ 62.956555][ T8575] ? tun_build_skb.isra.0+0x1390/0x1390 [ 62.962078][ T8575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.968290][ T8575] ? __kasan_check_read+0x11/0x20 [ 62.973294][ T8575] tun_chr_write_iter+0xbd/0x156 [ 62.978202][ T8575] do_iter_readv_writev+0x5f8/0x8f0 [ 62.983373][ T8575] ? no_seek_end_llseek_size+0x70/0x70 [ 62.988808][ T8575] ? apparmor_file_permission+0x25/0x30 [ 62.994335][ T8575] ? rw_verify_area+0x126/0x360 [ 62.999161][ T8575] do_iter_write+0x184/0x610 [ 63.003723][ T8575] ? dup_iter+0x250/0x250 [ 63.008028][ T8575] vfs_writev+0x1b3/0x2f0 [ 63.012342][ T8575] ? vfs_iter_write+0xb0/0xb0 [ 63.016991][ T8575] ? find_held_lock+0x35/0x130 [ 63.021732][ T8575] ? __do_page_fault+0x56a/0xdd0 [ 63.026648][ T8575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.032868][ T8575] ? __fget_light+0x1a9/0x230 [ 63.037518][ T8575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.043740][ T8575] do_writev+0x15b/0x330 [ 63.047958][ T8575] ? vfs_writev+0x2f0/0x2f0 [ 63.052448][ T8575] ? do_syscall_64+0x26/0x6a0 [ 63.057102][ T8575] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.063150][ T8575] ? do_syscall_64+0x26/0x6a0 [ 63.067807][ T8575] __x64_sys_writev+0x75/0xb0 [ 63.072455][ T8575] do_syscall_64+0xfd/0x6a0 [ 63.076938][ T8575] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.082800][ T8575] RIP: 0033:0x441b10 [ 63.086670][ T8575] Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 01 95 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 63.106331][ T8575] RSP: 002b:00007ffd62a1d0a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 63.114711][ T8575] RAX: ffffffffffffffda RBX: 00007ffd62a1d0c0 RCX: 0000000000441b10 [ 63.122657][ T8575] RDX: 0000000000000001 RSI: 00007ffd62a1d0f0 RDI: 00000000000000f0 [ 63.130602][ T8575] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 63.138549][ T8575] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000f466 [ 63.146494][ T8575] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 63.154439][ T8575] Modules linked in: [ 63.158355][ T8575] ---[ end trace 89c934079baa0274 ]--- [ 63.163803][ T8575] RIP: 0010:skb_pull+0xea/0x110 [ 63.168665][ T8575] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c d5 dd fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 d5 dd fb <0f> 0b e8 df 03 18 fc e9 44 ff ff ff e8 d5 03 18 fc eb 8a e8 ee 03 [ 63.188278][ T8575] RSP: 0018:ffff88809893ee10 EFLAGS: 00010293 [ 63.194317][ T8575] RAX: ffff8880940bc180 RBX: 0000000000000004 RCX: ffffffff8594b3a6 [ 63.202287][ T8575] RDX: 0000000000000000 RSI: ffffffff8594b3fa RDI: 0000000000000004 [ 63.210260][ T8575] RBP: ffff88809893ee30 R08: ffff8880940bc180 R09: fffffbfff14a914f [ 63.218237][ T8575] R10: fffffbfff14a914e R11: ffffffff8a548a77 R12: 000000008e9ad98c [ 63.226210][ T8575] R13: ffff88809893f478 R14: 00000000ffff8880 R15: ffff88809893f478 [ 63.234161][ T8575] FS: 0000555556fe1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.243089][ T8575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.249668][ T8575] CR2: 0000000020000040 CR3: 00000000a056c000 CR4: 00000000001406e0 [ 63.257641][ T8575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.265641][ T8575] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.273589][ T8575] Kernel panic - not syncing: Fatal exception in interrupt [ 63.281881][ T8575] Kernel Offset: disabled [ 63.286198][ T8575] Rebooting in 86400 seconds..