[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.093588][ T27] audit: type=1800 audit(1577182067.644:25): pid=8962 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 80.114404][ T27] audit: type=1800 audit(1577182067.644:26): pid=8962 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 80.159199][ T27] audit: type=1800 audit(1577182067.654:27): pid=8962 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 '10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.967014][ T9116] skbuff: skb_over_panic: text:0000000055d11944 len:194 put:82 head:00000000a1f4d735 data:00000000a1f4d735 tail:0xc2 end:0xc0 dev: [ 91.981619][ T9116] ------------[ cut here ]------------ [ 91.987069][ T9116] kernel BUG at net/core/skbuff.c:108! [ 91.992620][ T9116] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 91.998689][ T9116] CPU: 1 PID: 9116 Comm: syz-executor119 Not tainted 5.5.0-rc2-syzkaller #0 [ 92.007346][ T9116] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.017395][ T9116] RIP: 0010:skb_panic+0x176/0x178 [ 92.022400][ T9116] 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 [ 92.041984][ T9116] RSP: 0018:ffffc90001d97990 EFLAGS: 00010282 [ 92.048030][ T9116] RAX: 0000000000000086 RBX: ffff88808da720c0 RCX: 0000000000000000 [ 92.055987][ T9116] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003b2f24 [ 92.063945][ T9116] RBP: ffffc90001d979f8 R08: 0000000000000086 R09: ffffed1015d26621 [ 92.071898][ T9116] R10: ffffed1015d26620 R11: ffff8880ae933107 R12: ffffffff88d50240 [ 92.079847][ T9116] R13: ffffffff8734af37 R14: 0000000000000052 R15: ffffffff88d4f520 [ 92.087803][ T9116] FS: 0000000002041880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 92.096712][ T9116] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.103285][ T9116] CR2: 00000000208c0000 CR3: 00000000a863c000 CR4: 00000000001406e0 [ 92.111294][ T9116] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.119246][ T9116] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.127194][ T9116] Call Trace: [ 92.130472][ T9116] ? sctp_addto_chunk+0xe7/0x2a0 [ 92.135386][ T9116] skb_put.cold+0x23/0x23 [ 92.139693][ T9116] sctp_addto_chunk+0xe7/0x2a0 [ 92.144445][ T9116] sctp_make_strreset_req+0x392/0x3e0 [ 92.149806][ T9116] ? sctp_make_ifwdtsn+0x150/0x150 [ 92.154895][ T9116] ? __kmalloc+0x608/0x770 [ 92.159300][ T9116] ? sctp_send_reset_streams+0x428/0xdd0 [ 92.164929][ T9116] sctp_send_reset_streams+0x7f9/0xdd0 [ 92.170455][ T9116] sctp_setsockopt+0x252f/0x7350 [ 92.175370][ T9116] ? sctp_setsockopt_bindx+0x2a0/0x2a0 [ 92.180806][ T9116] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.187022][ T9116] ? aa_label_sk_perm+0x91/0xf0 [ 92.191851][ T9116] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 92.197468][ T9116] ? aa_sk_perm+0x346/0xaf0 [ 92.201946][ T9116] ? __local_bh_enable_ip+0x15a/0x270 [ 92.207293][ T9116] ? _raw_spin_unlock_bh+0x2c/0x30 [ 92.212386][ T9116] ? __local_bh_enable_ip+0x15a/0x270 [ 92.217745][ T9116] ? aa_af_perm+0x2a0/0x2a0 [ 92.222223][ T9116] ? release_sock+0x156/0x1c0 [ 92.226878][ T9116] ? __local_bh_enable_ip+0x15a/0x270 [ 92.232230][ T9116] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 92.237751][ T9116] sock_common_setsockopt+0x94/0xd0 [ 92.242926][ T9116] __sys_setsockopt+0x261/0x4c0 [ 92.247752][ T9116] ? sock_create_kern+0x50/0x50 [ 92.252582][ T9116] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 92.258808][ T9116] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.264243][ T9116] ? do_syscall_64+0x26/0x790 [ 92.268898][ T9116] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.274944][ T9116] ? do_syscall_64+0x26/0x790 [ 92.279601][ T9116] __x64_sys_setsockopt+0xbe/0x150 [ 92.284691][ T9116] do_syscall_64+0xfa/0x790 [ 92.289188][ T9116] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.295065][ T9116] RIP: 0033:0x4402d9 [ 92.298949][ T9116] 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 [ 92.318540][ T9116] RSP: 002b:00007ffef823f0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 92.326926][ T9116] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9 [ 92.334874][ T9116] RDX: 0000000000000077 RSI: 0000000000000084 RDI: 0000000000000003 [ 92.342824][ T9116] RBP: 00000000006ca018 R08: 00000000000002de R09: 00000000004002c8 [ 92.350772][ T9116] R10: 000000002081e000 R11: 0000000000000246 R12: 0000000000401b60 [ 92.358719][ T9116] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 92.366668][ T9116] Modules linked in: [ 92.370966][ T9116] ---[ end trace caa990a0306c1a5e ]--- [ 92.376428][ T9116] RIP: 0010:skb_panic+0x176/0x178 [ 92.381696][ T9116] 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 [ 92.401329][ T9116] RSP: 0018:ffffc90001d97990 EFLAGS: 00010282 [ 92.407396][ T9116] RAX: 0000000000000086 RBX: ffff88808da720c0 RCX: 0000000000000000 [ 92.415377][ T9116] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003b2f24 [ 92.423363][ T9116] RBP: ffffc90001d979f8 R08: 0000000000000086 R09: ffffed1015d26621 [ 92.431344][ T9116] R10: ffffed1015d26620 R11: ffff8880ae933107 R12: ffffffff88d50240 [ 92.439328][ T9116] R13: ffffffff8734af37 R14: 0000000000000052 R15: ffffffff88d4f520 [ 92.447279][ T9116] FS: 0000000002041880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 92.456215][ T9116] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.462806][ T9116] CR2: 00000000208c0000 CR3: 00000000a863c000 CR4: 00000000001406e0 [ 92.470790][ T9116] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.478797][ T9116] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.486793][ T9116] Kernel panic - not syncing: Fatal exception [ 92.494229][ T9116] Kernel Offset: disabled [ 92.498570][ T9116] Rebooting in 86400 seconds..