[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 88.722110][ T27] audit: type=1800 audit(1577182044.787:25): pid=9124 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 88.742090][ T27] audit: type=1800 audit(1577182044.787:26): pid=9124 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 88.764835][ T27] audit: type=1800 audit(1577182044.787:27): pid=9124 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.199' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 98.860515][ T9276] skbuff: skb_over_panic: text:0000000097541be3 len:194 put:82 head:000000008d046ec2 data:000000008d046ec2 tail:0xc2 end:0xc0 dev:<NULL> [ 98.875284][ T9276] ------------[ cut here ]------------ [ 98.880740][ T9276] kernel BUG at net/core/skbuff.c:108! [ 98.886474][ T9276] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 98.892533][ T9276] CPU: 1 PID: 9276 Comm: syz-executor794 Not tainted 5.5.0-rc2-syzkaller #0 [ 98.901186][ T9276] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.911238][ T9276] RIP: 0010:skb_panic+0x176/0x178 [ 98.916420][ T9276] Code: dc 9b fb 4c 8b 4d b8 8b 4b 70 41 57 45 89 f0 4c 89 ea ff 75 d0 4c 89 e6 48 c7 c7 60 21 d5 88 ff 75 c8 ff 75 c0 e8 f2 6e 47 fb <0f> 0b e8 f7 23 5e fb 4c 8b 6d 08 e8 be d3 9b fb 48 c7 c1 00 2e d5 [ 98.936015][ T9276] RSP: 0018:ffffc90001e17990 EFLAGS: 00010282 [ 98.942076][ T9276] RAX: 0000000000000086 RBX: ffff888095c32200 RCX: 0000000000000000 [ 98.950026][ T9276] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003c2f24 [ 98.957994][ T9276] RBP: ffffc90001e179f8 R08: 0000000000000086 R09: ffffed1015d26621 [ 98.965955][ T9276] R10: ffffed1015d26620 R11: ffff8880ae933107 R12: ffffffff88d52e40 [ 98.973916][ T9276] R13: ffffffff873749e7 R14: 0000000000000052 R15: ffffffff88d52120 [ 98.981868][ T9276] FS: 0000000001afe880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 98.990773][ T9276] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.997334][ T9276] CR2: 00000000208c0000 CR3: 0000000094bad000 CR4: 00000000001406e0 [ 99.005305][ T9276] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 99.013267][ T9276] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 99.021223][ T9276] Call Trace: [ 99.024521][ T9276] ? sctp_addto_chunk+0xe7/0x2a0 [ 99.029450][ T9276] skb_put.cold+0x23/0x23 [ 99.033759][ T9276] sctp_addto_chunk+0xe7/0x2a0 [ 99.038517][ T9276] sctp_make_strreset_req+0x392/0x3e0 [ 99.043866][ T9276] ? sctp_make_ifwdtsn+0x150/0x150 [ 99.048955][ T9276] ? __kmalloc+0x608/0x770 [ 99.053351][ T9276] ? sctp_send_reset_streams+0x428/0xdd0 [ 99.058964][ T9276] sctp_send_reset_streams+0x7f9/0xdd0 [ 99.064413][ T9276] sctp_setsockopt+0x252f/0x7350 [ 99.069338][ T9276] ? sctp_setsockopt_bindx+0x2a0/0x2a0 [ 99.074786][ T9276] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 99.081041][ T9276] ? aa_label_sk_perm+0x91/0xf0 [ 99.085881][ T9276] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 99.091512][ T9276] ? aa_sk_perm+0x346/0xaf0 [ 99.096055][ T9276] ? __local_bh_enable_ip+0x15a/0x270 [ 99.101420][ T9276] ? _raw_spin_unlock_bh+0x2c/0x30 [ 99.106556][ T9276] ? __local_bh_enable_ip+0x15a/0x270 [ 99.111912][ T9276] ? aa_af_perm+0x2a0/0x2a0 [ 99.116451][ T9276] ? release_sock+0x156/0x1c0 [ 99.121114][ T9276] ? __local_bh_enable_ip+0x15a/0x270 [ 99.126465][ T9276] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 99.131992][ T9276] sock_common_setsockopt+0x94/0xd0 [ 99.137221][ T9276] __sys_setsockopt+0x261/0x4c0 [ 99.142046][ T9276] ? sock_create_kern+0x50/0x50 [ 99.146891][ T9276] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 99.153108][ T9276] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.158630][ T9276] ? do_syscall_64+0x26/0x790 [ 99.163281][ T9276] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.169334][ T9276] ? do_syscall_64+0x26/0x790 [ 99.173996][ T9276] __x64_sys_setsockopt+0xbe/0x150 [ 99.179084][ T9276] do_syscall_64+0xfa/0x790 [ 99.183562][ T9276] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.189431][ T9276] RIP: 0033:0x4402d9 [ 99.193304][ T9276] 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 [ 99.212896][ T9276] RSP: 002b:00007fff714991d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 99.221302][ T9276] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9 [ 99.229272][ T9276] RDX: 0000000000000077 RSI: 0000000000000084 RDI: 0000000000000003 [ 99.237311][ T9276] RBP: 00000000006ca018 R08: 00000000000002de R09: 00000000004002c8 [ 99.245260][ T9276] R10: 000000002081e000 R11: 0000000000000246 R12: 0000000000401b60 [ 99.253210][ T9276] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 99.261610][ T9276] Modules linked in: [ 99.265966][ T9276] ---[ end trace de84cada11e25d34 ]--- [ 99.271435][ T9276] RIP: 0010:skb_panic+0x176/0x178 [ 99.276721][ T9276] Code: dc 9b fb 4c 8b 4d b8 8b 4b 70 41 57 45 89 f0 4c 89 ea ff 75 d0 4c 89 e6 48 c7 c7 60 21 d5 88 ff 75 c8 ff 75 c0 e8 f2 6e 47 fb <0f> 0b e8 f7 23 5e fb 4c 8b 6d 08 e8 be d3 9b fb 48 c7 c1 00 2e d5 [ 99.296361][ T9276] RSP: 0018:ffffc90001e17990 EFLAGS: 00010282 [ 99.302445][ T9276] RAX: 0000000000000086 RBX: ffff888095c32200 RCX: 0000000000000000 [ 99.310442][ T9276] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003c2f24 [ 99.318540][ T9276] RBP: ffffc90001e179f8 R08: 0000000000000086 R09: ffffed1015d26621 [ 99.326669][ T9276] R10: ffffed1015d26620 R11: ffff8880ae933107 R12: ffffffff88d52e40 [ 99.334696][ T9276] R13: ffffffff873749e7 R14: 0000000000000052 R15: ffffffff88d52120 [ 99.342760][ T9276] FS: 0000000001afe880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 99.351717][ T9276] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.358378][ T9276] CR2: 00000000208c0000 CR3: 0000000094bad000 CR4: 00000000001406e0 [ 99.366386][ T9276] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 99.374353][ T9276] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 99.382376][ T9276] Kernel panic - not syncing: Fatal exception [ 99.389899][ T9276] Kernel Offset: disabled [ 99.394228][ T9276] Rebooting in 86400 seconds..