[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 71.255825][ T28] audit: type=1800 audit(1577182388.340:25): pid=9129 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 71.289865][ T28] audit: type=1800 audit(1577182388.340:26): pid=9129 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 71.328963][ T28] audit: type=1800 audit(1577182388.340:27): pid=9129 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 '10.128.1.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.076935][ T9284] skbuff: skb_over_panic: text:000000008e9b1a3a len:194 put:82 head:0000000058e8063d data:0000000058e8063d tail:0xc2 end:0xc0 dev: [ 83.091640][ T9284] ------------[ cut here ]------------ [ 83.097109][ T9284] kernel BUG at net/core/skbuff.c:108! [ 83.102656][ T9284] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 83.108736][ T9284] CPU: 0 PID: 9284 Comm: syz-executor529 Not tainted 5.5.0-rc3-syzkaller #0 [ 83.117405][ T9284] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.127461][ T9284] RIP: 0010:skb_panic+0x176/0x178 [ 83.132552][ T9284] Code: 6d 9e 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 f5 d4 88 ff 75 c8 ff 75 c0 e8 a2 ff 49 fb <0f> 0b e8 a7 b4 60 fb 4c 8b 6d 08 e8 6e 64 9e fb 48 c7 c1 00 02 d5 [ 83.152228][ T9284] RSP: 0018:ffffc90001d87990 EFLAGS: 00010282 [ 83.158288][ T9284] RAX: 0000000000000086 RBX: ffff8880a8abad00 RCX: 0000000000000000 [ 83.166243][ T9284] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003b0f24 [ 83.174197][ T9284] RBP: ffffc90001d879f8 R08: 0000000000000086 R09: ffffed1015d06621 [ 83.182150][ T9284] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: ffffffff88d50240 [ 83.190115][ T9284] R13: ffffffff8734af37 R14: 0000000000000052 R15: ffffffff88d4f520 [ 83.198076][ T9284] FS: 0000000000a40880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 83.206991][ T9284] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.216070][ T9284] CR2: 00000000208c0000 CR3: 00000000a7083000 CR4: 00000000001406f0 [ 83.224035][ T9284] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.232099][ T9284] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.240061][ T9284] Call Trace: [ 83.243335][ T9284] ? sctp_addto_chunk+0xe7/0x2a0 [ 83.248251][ T9284] skb_put.cold+0x23/0x23 [ 83.252562][ T9284] sctp_addto_chunk+0xe7/0x2a0 [ 83.257306][ T9284] sctp_make_strreset_req+0x392/0x3e0 [ 83.262660][ T9284] ? sctp_make_ifwdtsn+0x150/0x150 [ 83.267752][ T9284] ? __kmalloc+0x608/0x770 [ 83.272178][ T9284] ? sctp_send_reset_streams+0x428/0xdd0 [ 83.277811][ T9284] sctp_send_reset_streams+0x7f9/0xdd0 [ 83.283262][ T9284] sctp_setsockopt+0x252f/0x7350 [ 83.288190][ T9284] ? sctp_setsockopt_bindx+0x2a0/0x2a0 [ 83.293641][ T9284] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.299895][ T9284] ? aa_label_sk_perm+0x91/0xf0 [ 83.304753][ T9284] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 83.310369][ T9284] ? aa_sk_perm+0x346/0xaf0 [ 83.314915][ T9284] ? __local_bh_enable_ip+0x15a/0x270 [ 83.320272][ T9284] ? _raw_spin_unlock_bh+0x2c/0x30 [ 83.325374][ T9284] ? __local_bh_enable_ip+0x15a/0x270 [ 83.330739][ T9284] ? aa_af_perm+0x2a0/0x2a0 [ 83.335842][ T9284] ? release_sock+0x156/0x1c0 [ 83.340500][ T9284] ? __local_bh_enable_ip+0x15a/0x270 [ 83.345860][ T9284] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 83.351388][ T9284] sock_common_setsockopt+0x94/0xd0 [ 83.356587][ T9284] __sys_setsockopt+0x261/0x4c0 [ 83.361516][ T9284] ? sock_create_kern+0x50/0x50 [ 83.366346][ T9284] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 83.372609][ T9284] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 83.378334][ T9284] ? do_syscall_64+0x26/0x790 [ 83.383007][ T9284] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.389057][ T9284] ? do_syscall_64+0x26/0x790 [ 83.393734][ T9284] __x64_sys_setsockopt+0xbe/0x150 [ 83.398845][ T9284] do_syscall_64+0xfa/0x790 [ 83.403353][ T9284] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.409239][ T9284] RIP: 0033:0x4402d9 [ 83.413128][ T9284] 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 [ 83.432725][ T9284] RSP: 002b:00007ffd26c3cab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 83.441222][ T9284] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9 [ 83.449183][ T9284] RDX: 0000000000000077 RSI: 0000000000000084 RDI: 0000000000000003 [ 83.457144][ T9284] RBP: 00000000006ca018 R08: 00000000000002de R09: 00000000004002c8 [ 83.465094][ T9284] R10: 000000002081e000 R11: 0000000000000246 R12: 0000000000401b60 [ 83.473043][ T9284] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 83.481010][ T9284] Modules linked in: [ 83.485458][ T9284] ---[ end trace 0c51972a434ba091 ]--- [ 83.491103][ T9284] RIP: 0010:skb_panic+0x176/0x178 [ 83.496119][ T9284] Code: 6d 9e 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 f5 d4 88 ff 75 c8 ff 75 c0 e8 a2 ff 49 fb <0f> 0b e8 a7 b4 60 fb 4c 8b 6d 08 e8 6e 64 9e fb 48 c7 c1 00 02 d5 [ 83.517402][ T9284] RSP: 0018:ffffc90001d87990 EFLAGS: 00010282 [ 83.523538][ T9284] RAX: 0000000000000086 RBX: ffff8880a8abad00 RCX: 0000000000000000 [ 83.531607][ T9284] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003b0f24 [ 83.539672][ T9284] RBP: ffffc90001d879f8 R08: 0000000000000086 R09: ffffed1015d06621 [ 83.547674][ T9284] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: ffffffff88d50240 [ 83.555872][ T9284] R13: ffffffff8734af37 R14: 0000000000000052 R15: ffffffff88d4f520 [ 83.563895][ T9284] FS: 0000000000a40880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 83.572857][ T9284] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.579505][ T9284] CR2: 00000000208c0000 CR3: 00000000a7083000 CR4: 00000000001406f0 [ 83.587510][ T9284] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.595504][ T9284] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.603504][ T9284] Kernel panic - not syncing: Fatal exception [ 83.611007][ T9284] Kernel Offset: disabled [ 83.615333][ T9284] Rebooting in 86400 seconds..