[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.820394][ T27] audit: type=1800 audit(1577852038.175:25): pid=9247 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.840083][ T27] audit: type=1800 audit(1577852038.175:26): pid=9247 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.885489][ T27] audit: type=1800 audit(1577852038.185:27): pid=9247 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 '10.128.1.47' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.679032][ T9398] skbuff: skb_over_panic: text:00000000c5187214 len:194 put:82 head:0000000030f40cee data:0000000030f40cee tail:0xc2 end:0xc0 dev: [ 77.693543][ T9398] ------------[ cut here ]------------ [ 77.699000][ T9398] kernel BUG at net/core/skbuff.c:108! [ 77.704519][ T9398] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 77.710675][ T9398] CPU: 1 PID: 9398 Comm: syz-executor138 Not tainted 5.5.0-rc2-next-20191220-syzkaller #0 [ 77.720539][ T9398] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.730613][ T9398] RIP: 0010:skb_panic+0x176/0x178 [ 77.735622][ T9398] Code: e5 98 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 a0 9d d5 88 ff 75 c8 ff 75 c0 e8 02 32 44 fb <0f> 0b e8 97 fa 5a fb 4c 8b 6d 08 e8 1e dc 98 fb 48 c7 c1 40 aa d5 [ 77.755208][ T9398] RSP: 0018:ffffc9000628f990 EFLAGS: 00010282 [ 77.761258][ T9398] RAX: 0000000000000086 RBX: ffff8880a22af3c0 RCX: 0000000000000000 [ 77.769213][ T9398] RDX: 0000000000000000 RSI: ffffffff815e9f66 RDI: fffff52000c51f24 [ 77.777177][ T9398] RBP: ffffc9000628f9f8 R08: 0000000000000086 R09: ffffed1015d26659 [ 77.785694][ T9398] R10: ffffed1015d26658 R11: ffff8880ae9332c7 R12: ffffffff88d5aa80 [ 77.793661][ T9398] R13: ffffffff873b1477 R14: 0000000000000052 R15: ffffffff88d59d60 [ 77.801717][ T9398] FS: 00000000012ac880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 77.811212][ T9398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.817973][ T9398] CR2: 00000000208c0000 CR3: 000000009313d000 CR4: 00000000001406e0 [ 77.826049][ T9398] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.834158][ T9398] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.842148][ T9398] Call Trace: [ 77.845431][ T9398] ? sctp_addto_chunk+0xe7/0x2a0 [ 77.850377][ T9398] skb_put.cold+0x23/0x23 [ 77.854706][ T9398] sctp_addto_chunk+0xe7/0x2a0 [ 77.859545][ T9398] sctp_make_strreset_req+0x392/0x3e0 [ 77.864948][ T9398] ? sctp_make_ifwdtsn+0x150/0x150 [ 77.870046][ T9398] ? __kmalloc+0x608/0x770 [ 77.874502][ T9398] ? sctp_send_reset_streams+0x428/0xdd0 [ 77.880121][ T9398] sctp_send_reset_streams+0x7f9/0xdd0 [ 77.885568][ T9398] sctp_setsockopt+0x252f/0x7350 [ 77.890704][ T9398] ? sctp_setsockopt_bindx+0x2a0/0x2a0 [ 77.896166][ T9398] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.902484][ T9398] ? aa_label_sk_perm+0x91/0xf0 [ 77.907359][ T9398] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 77.913061][ T9398] ? aa_sk_perm+0x346/0xb00 [ 77.917576][ T9398] ? __local_bh_enable_ip+0x15a/0x270 [ 77.922941][ T9398] ? _raw_spin_unlock_bh+0x2c/0x30 [ 77.928041][ T9398] ? __local_bh_enable_ip+0x15a/0x270 [ 77.933400][ T9398] ? aa_af_perm+0x2a0/0x2a0 [ 77.937926][ T9398] ? release_sock+0x156/0x1c0 [ 77.942590][ T9398] ? __local_bh_enable_ip+0x15a/0x270 [ 77.947959][ T9398] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 77.953501][ T9398] sock_common_setsockopt+0x94/0xd0 [ 77.958685][ T9398] __sys_setsockopt+0x261/0x4c0 [ 77.963521][ T9398] ? sock_create_kern+0x50/0x50 [ 77.968358][ T9398] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.974602][ T9398] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.980260][ T9398] ? do_syscall_64+0x26/0x790 [ 77.985058][ T9398] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.991200][ T9398] ? do_syscall_64+0x26/0x790 [ 77.995884][ T9398] __x64_sys_setsockopt+0xbe/0x150 [ 78.000993][ T9398] do_syscall_64+0xfa/0x790 [ 78.005487][ T9398] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.011363][ T9398] RIP: 0033:0x4402d9 [ 78.015245][ T9398] 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 [ 78.034883][ T9398] RSP: 002b:00007ffe71eb08d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 78.043301][ T9398] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9 [ 78.051293][ T9398] RDX: 0000000000000077 RSI: 0000000000000084 RDI: 0000000000000003 [ 78.059250][ T9398] RBP: 00000000006ca018 R08: 00000000000002de R09: 00000000004002c8 [ 78.067216][ T9398] R10: 000000002081e000 R11: 0000000000000246 R12: 0000000000401b60 [ 78.075179][ T9398] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 78.083290][ T9398] Modules linked in: [ 78.088679][ T9398] ---[ end trace d0c8e4582023cb55 ]--- [ 78.094154][ T9398] RIP: 0010:skb_panic+0x176/0x178 [ 78.099543][ T9398] Code: e5 98 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 a0 9d d5 88 ff 75 c8 ff 75 c0 e8 02 32 44 fb <0f> 0b e8 97 fa 5a fb 4c 8b 6d 08 e8 1e dc 98 fb 48 c7 c1 40 aa d5 [ 78.119520][ T9398] RSP: 0018:ffffc9000628f990 EFLAGS: 00010282 [ 78.125599][ T9398] RAX: 0000000000000086 RBX: ffff8880a22af3c0 RCX: 0000000000000000 [ 78.133603][ T9398] RDX: 0000000000000000 RSI: ffffffff815e9f66 RDI: fffff52000c51f24 [ 78.141620][ T9398] RBP: ffffc9000628f9f8 R08: 0000000000000086 R09: ffffed1015d26659 [ 78.149612][ T9398] R10: ffffed1015d26658 R11: ffff8880ae9332c7 R12: ffffffff88d5aa80 [ 78.157605][ T9398] R13: ffffffff873b1477 R14: 0000000000000052 R15: ffffffff88d59d60 [ 78.165643][ T9398] FS: 00000000012ac880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 78.174604][ T9398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.181242][ T9398] CR2: ffffffffff600400 CR3: 000000009313d000 CR4: 00000000001406e0 [ 78.189238][ T9398] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.197197][ T9398] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.205196][ T9398] Kernel panic - not syncing: Fatal exception [ 78.212664][ T9398] Kernel Offset: disabled [ 78.216996][ T9398] Rebooting in 86400 seconds..