[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 88.036990][ T27] audit: type=1800 audit(1577201258.346:25): pid=9100 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 88.063217][ T27] audit: type=1800 audit(1577201258.346:26): pid=9100 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 88.108481][ T27] audit: type=1800 audit(1577201258.346:27): pid=9100 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 '10.128.10.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 98.766023][ T9252] skbuff: skb_over_panic: text:0000000049f02b2b len:194 put:82 head:00000000474f14c2 data:00000000474f14c2 tail:0xc2 end:0xc0 dev:<NULL> [ 98.780478][ T9252] ------------[ cut here ]------------ [ 98.785937][ T9252] kernel BUG at net/core/skbuff.c:108! [ 98.791952][ T9252] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 98.798022][ T9252] CPU: 0 PID: 9252 Comm: syz-executor005 Not tainted 5.5.0-rc3-syzkaller #0 [ 98.806760][ T9252] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.816895][ T9252] RIP: 0010:skb_panic+0x176/0x178 [ 98.821919][ T9252] 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 [ 98.843345][ T9252] RSP: 0018:ffffc90001ed7990 EFLAGS: 00010282 [ 98.849657][ T9252] RAX: 0000000000000086 RBX: ffff8880a00dc7c0 RCX: 0000000000000000 [ 98.857618][ T9252] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003daf24 [ 98.865584][ T9252] RBP: ffffc90001ed79f8 R08: 0000000000000086 R09: ffffed1015d06621 [ 98.873533][ T9252] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: ffffffff88d50240 [ 98.881491][ T9252] R13: ffffffff8734af37 R14: 0000000000000052 R15: ffffffff88d4f520 [ 98.889496][ T9252] FS: 0000000002023880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 98.898407][ T9252] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.904978][ T9252] CR2: 00000000208c0000 CR3: 000000009ddd2000 CR4: 00000000001406f0 [ 98.912934][ T9252] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.920886][ T9252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.929007][ T9252] Call Trace: [ 98.932302][ T9252] ? sctp_addto_chunk+0xe7/0x2a0 [ 98.937247][ T9252] skb_put.cold+0x23/0x23 [ 98.941585][ T9252] sctp_addto_chunk+0xe7/0x2a0 [ 98.946349][ T9252] sctp_make_strreset_req+0x392/0x3e0 [ 98.951764][ T9252] ? sctp_make_ifwdtsn+0x150/0x150 [ 98.956895][ T9252] ? __kmalloc+0x608/0x770 [ 98.961848][ T9252] ? sctp_send_reset_streams+0x428/0xdd0 [ 98.967459][ T9252] sctp_send_reset_streams+0x7f9/0xdd0 [ 98.972915][ T9252] sctp_setsockopt+0x252f/0x7350 [ 98.977830][ T9252] ? sctp_setsockopt_bindx+0x2a0/0x2a0 [ 98.983266][ T9252] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 98.989481][ T9252] ? aa_label_sk_perm+0x91/0xf0 [ 98.994334][ T9252] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 98.999944][ T9252] ? aa_sk_perm+0x346/0xaf0 [ 99.004423][ T9252] ? __local_bh_enable_ip+0x15a/0x270 [ 99.011417][ T9252] ? _raw_spin_unlock_bh+0x2c/0x30 [ 99.016944][ T9252] ? __local_bh_enable_ip+0x15a/0x270 [ 99.022293][ T9252] ? aa_af_perm+0x2a0/0x2a0 [ 99.026773][ T9252] ? release_sock+0x156/0x1c0 [ 99.031511][ T9252] ? __local_bh_enable_ip+0x15a/0x270 [ 99.036947][ T9252] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 99.042539][ T9252] sock_common_setsockopt+0x94/0xd0 [ 99.047731][ T9252] __sys_setsockopt+0x261/0x4c0 [ 99.052568][ T9252] ? sock_create_kern+0x50/0x50 [ 99.057412][ T9252] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 99.065120][ T9252] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.070559][ T9252] ? do_syscall_64+0x26/0x790 [ 99.075228][ T9252] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.081282][ T9252] ? do_syscall_64+0x26/0x790 [ 99.085963][ T9252] __x64_sys_setsockopt+0xbe/0x150 [ 99.091069][ T9252] do_syscall_64+0xfa/0x790 [ 99.095567][ T9252] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.101627][ T9252] RIP: 0033:0x4402d9 [ 99.105601][ T9252] 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 [ 99.125195][ T9252] RSP: 002b:00007ffc3fa83ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 99.133763][ T9252] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9 [ 99.141717][ T9252] RDX: 0000000000000077 RSI: 0000000000000084 RDI: 0000000000000003 [ 99.149687][ T9252] RBP: 00000000006ca018 R08: 00000000000002de R09: 00000000004002c8 [ 99.157697][ T9252] R10: 000000002081e000 R11: 0000000000000246 R12: 0000000000401b60 [ 99.165648][ T9252] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 99.173618][ T9252] Modules linked in: [ 99.177657][ T9252] ---[ end trace 335ef2b075ddf5c5 ]--- [ 99.183165][ T9252] RIP: 0010:skb_panic+0x176/0x178 [ 99.188189][ T9252] 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 [ 99.207848][ T9252] RSP: 0018:ffffc90001ed7990 EFLAGS: 00010282 [ 99.213940][ T9252] RAX: 0000000000000086 RBX: ffff8880a00dc7c0 RCX: 0000000000000000 [ 99.221938][ T9252] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003daf24 [ 99.229910][ T9252] RBP: ffffc90001ed79f8 R08: 0000000000000086 R09: ffffed1015d06621 [ 99.237903][ T9252] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: ffffffff88d50240 [ 99.245895][ T9252] R13: ffffffff8734af37 R14: 0000000000000052 R15: ffffffff88d4f520 [ 99.253887][ T9252] FS: 0000000002023880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 99.262834][ T9252] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.269407][ T9252] CR2: 00000000208c0000 CR3: 000000009ddd2000 CR4: 00000000001406f0 [ 99.278094][ T9252] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 99.286097][ T9252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 99.294081][ T9252] Kernel panic - not syncing: Fatal exception [ 99.301531][ T9252] Kernel Offset: disabled [ 99.305870][ T9252] Rebooting in 86400 seconds..