[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.366517][ T25] audit: type=1800 audit(1565970041.963:25): pid=8654 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.388701][ T25] audit: type=1800 audit(1565970041.963:26): pid=8654 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.409443][ T25] audit: type=1800 audit(1565970041.963:27): pid=8654 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 '10.128.0.166' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 65.273595][ T8809] IPVS: ftp: loaded support on port[0] = 21 executing program [ 65.339106][ T8817] ------------[ cut here ]------------ [ 65.345354][ T8817] kernel BUG at include/linux/skbuff.h:2225! [ 65.352275][ T8817] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 65.358500][ T8817] CPU: 0 PID: 8817 Comm: syz-executor142 Not tainted 5.3.0-rc3+ #134 [ 65.367114][ T8817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.377463][ T8817] RIP: 0010:skb_pull+0xea/0x110 [ 65.382526][ T8817] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c e5 dd fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 e5 dd fb <0f> 0b e8 df 13 18 fc e9 44 ff ff ff e8 d5 13 18 fc eb 8a e8 ee 13 [ 65.402571][ T8817] RSP: 0018:ffff888089fe6e10 EFLAGS: 00010293 [ 65.408782][ T8817] RAX: ffff88809d396400 RBX: 0000000000000004 RCX: ffffffff8594a3a6 [ 65.417065][ T8817] RDX: 0000000000000000 RSI: ffffffff8594a3fa RDI: 0000000000000004 [ 65.425418][ T8817] RBP: ffff888089fe6e30 R08: ffff88809d396400 R09: fffffbfff14a8f4f [ 65.433393][ T8817] R10: fffffbfff14a8f4e R11: ffffffff8a547a77 R12: 00000000a65db98c [ 65.441442][ T8817] R13: ffff888089fe7478 R14: 00000000ffff8880 R15: ffff888089fe7478 [ 65.449586][ T8817] FS: 0000555556e53880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 65.458501][ T8817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.465189][ T8817] CR2: 0000000020000100 CR3: 00000000a852c000 CR4: 00000000001406f0 [ 65.473171][ T8817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.481648][ T8817] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.489905][ T8817] Call Trace: [ 65.493389][ T8817] sctp_inq_pop+0x2f1/0xd80 [ 65.497971][ T8817] sctp_endpoint_bh_rcv+0x184/0x8d0 [ 65.503291][ T8817] ? sctp_endpoint_lookup_assoc+0x290/0x290 [ 65.509175][ T8817] ? rwlock_bug.part.0+0x90/0x90 [ 65.514455][ T8817] ? lock_acquire+0x190/0x410 [ 65.519126][ T8817] sctp_inq_push+0x1e4/0x280 [ 65.524273][ T8817] sctp_rcv+0x2807/0x3590 [ 65.528943][ T8817] ? sctp_addrs_lookup_transport+0x7a0/0x7a0 [ 65.535401][ T8817] ? __kasan_check_read+0x11/0x20 [ 65.540425][ T8817] ? mark_lock+0xc0/0x11e0 [ 65.545272][ T8817] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 65.551706][ T8817] ? raw6_local_deliver+0x5f9/0xae0 [ 65.556919][ T8817] sctp6_rcv+0x17/0x30 [ 65.560991][ T8817] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 65.566629][ T8817] ip6_input_finish+0x84/0x170 [ 65.571518][ T8817] ip6_input+0xe4/0x3f0 [ 65.575670][ T8817] ? ip6_input_finish+0x170/0x170 [ 65.580874][ T8817] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 65.587025][ T8817] ip6_sublist_rcv_finish+0x98/0x1e0 [ 65.592485][ T8817] ip6_sublist_rcv+0x80c/0xcf0 [ 65.597240][ T8817] ? ip6_rcv_finish+0x2f0/0x2f0 [ 65.602207][ T8817] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 65.608095][ T8817] ? ip6_rcv_core.isra.0+0x1011/0x1bb0 [ 65.613876][ T8817] ipv6_list_rcv+0x373/0x4b0 [ 65.618460][ T8817] ? ipv6_rcv+0x420/0x420 [ 65.623646][ T8817] ? ipv6_rcv+0x420/0x420 [ 65.628232][ T8817] __netif_receive_skb_list_core+0x5fc/0x9d0 [ 65.634662][ T8817] ? ktime_get_with_offset+0x13a/0x350 [ 65.640281][ T8817] ? ktime_get_with_offset+0x13a/0x350 [ 65.645993][ T8817] ? process_backlog+0x750/0x750 [ 65.651012][ T8817] ? lock_acquire+0x190/0x410 [ 65.655687][ T8817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.662243][ T8817] ? __kasan_check_read+0x11/0x20 [ 65.667269][ T8817] netif_receive_skb_list_internal+0x7eb/0xe60 [ 65.673664][ T8817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.680009][ T8817] ? __netif_receive_skb_list_core+0x9d0/0x9d0 [ 65.686323][ T8817] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 65.692892][ T8817] ? eth_gro_receive+0x890/0x890 [ 65.697948][ T8817] gro_normal_list.part.0+0x1e/0xb0 [ 65.703241][ T8817] napi_gro_frags+0xa6a/0xea0 [ 65.707948][ T8817] tun_get_user+0x2e98/0x3fa0 [ 65.712833][ T8817] ? __kasan_check_read+0x11/0x20 [ 65.718069][ T8817] ? tun_build_skb.isra.0+0x1390/0x1390 [ 65.723709][ T8817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.730477][ T8817] ? __kasan_check_read+0x11/0x20 [ 65.735809][ T8817] tun_chr_write_iter+0xbd/0x156 [ 65.741009][ T8817] do_iter_readv_writev+0x5f8/0x8f0 [ 65.746340][ T8817] ? no_seek_end_llseek_size+0x70/0x70 [ 65.752260][ T8817] ? apparmor_file_permission+0x25/0x30 [ 65.757967][ T8817] ? rw_verify_area+0x126/0x360 [ 65.762827][ T8817] do_iter_write+0x184/0x610 [ 65.767418][ T8817] ? dup_iter+0x250/0x250 [ 65.771903][ T8817] vfs_writev+0x1b3/0x2f0 [ 65.776237][ T8817] ? vfs_iter_write+0xb0/0xb0 [ 65.781078][ T8817] ? find_held_lock+0x35/0x130 [ 65.786113][ T8817] ? __do_page_fault+0x56a/0xdd0 [ 65.791053][ T8817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.797481][ T8817] ? __fget_light+0x1a9/0x230 [ 65.802234][ T8817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.808556][ T8817] do_writev+0x15b/0x330 [ 65.812882][ T8817] ? vfs_writev+0x2f0/0x2f0 [ 65.817379][ T8817] ? do_syscall_64+0x26/0x6a0 [ 65.822286][ T8817] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.828480][ T8817] ? do_syscall_64+0x26/0x6a0 [ 65.833195][ T8817] __x64_sys_writev+0x75/0xb0 [ 65.837865][ T8817] do_syscall_64+0xfd/0x6a0 [ 65.842487][ T8817] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.848425][ T8817] RIP: 0033:0x441b10 [ 65.852314][ T8817] 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 [ 65.872622][ T8817] RSP: 002b:00007fffae8b5768 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 65.881331][ T8817] RAX: ffffffffffffffda RBX: 00007fffae8b5780 RCX: 0000000000441b10 [ 65.889569][ T8817] RDX: 0000000000000001 RSI: 00007fffae8b57b0 RDI: 00000000000000f0 [ 65.897887][ T8817] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 65.905994][ T8817] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000ff1b [ 65.914169][ T8817] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 65.922215][ T8817] Modules linked in: [ 65.926165][ T8817] ---[ end trace 81c337c54403f5fa ]--- [ 65.931845][ T8817] RIP: 0010:skb_pull+0xea/0x110 [ 65.936926][ T8817] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c e5 dd fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 e5 dd fb <0f> 0b e8 df 13 18 fc e9 44 ff ff ff e8 d5 13 18 fc eb 8a e8 ee 13 [ 65.957194][ T8817] RSP: 0018:ffff888089fe6e10 EFLAGS: 00010293 [ 65.964499][ T8817] RAX: ffff88809d396400 RBX: 0000000000000004 RCX: ffffffff8594a3a6 [ 65.972646][ T8817] RDX: 0000000000000000 RSI: ffffffff8594a3fa RDI: 0000000000000004 [ 65.980915][ T8817] RBP: ffff888089fe6e30 R08: ffff88809d396400 R09: fffffbfff14a8f4f [ 65.989171][ T8817] R10: fffffbfff14a8f4e R11: ffffffff8a547a77 R12: 00000000a65db98c [ 65.997269][ T8817] R13: ffff888089fe7478 R14: 00000000ffff8880 R15: ffff888089fe7478 [ 66.005403][ T8817] FS: 0000555556e53880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 66.014665][ T8817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.021283][ T8817] CR2: 0000000020000100 CR3: 00000000a852c000 CR4: 00000000001406f0 [ 66.029719][ T8817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.037872][ T8817] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.045947][ T8817] Kernel panic - not syncing: Fatal exception in interrupt [ 66.055411][ T8817] Kernel Offset: disabled [ 66.059751][ T8817] Rebooting in 86400 seconds..