[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.850477][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 61.850487][ T26] audit: type=1800 audit(1566931459.644:29): pid=9686 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 61.883999][ T26] audit: type=1800 audit(1566931459.644:30): pid=9686 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 84.687404][ T9844] ------------[ cut here ]------------ [ 84.693752][ T9844] WARNING: CPU: 0 PID: 9844 at include/net/sock.h:666 smc_unhash_sk.cold+0x11/0x18 [ 84.703386][ T9844] Kernel panic - not syncing: panic_on_warn set ... [ 84.710178][ T9844] CPU: 0 PID: 9844 Comm: syz-executor715 Not tainted 5.3.0-rc6 #146 [ 84.718644][ T9844] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.728958][ T9844] Call Trace: [ 84.732258][ T9844] dump_stack+0x172/0x1f0 [ 84.736582][ T9844] ? smc_listen_work+0x1580/0x15a3 [ 84.741697][ T9844] panic+0x2dc/0x755 [ 84.746188][ T9844] ? add_taint.cold+0x16/0x16 [ 84.750854][ T9844] ? __kasan_check_write+0x14/0x20 [ 84.755959][ T9844] ? __warn.cold+0x5/0x4c [ 84.760473][ T9844] ? __warn+0xe7/0x1e0 [ 84.764605][ T9844] ? smc_unhash_sk.cold+0x11/0x18 [ 84.771958][ T9844] __warn.cold+0x20/0x4c [ 84.776214][ T9844] ? smc_unhash_sk.cold+0x11/0x18 [ 84.781224][ T9844] report_bug+0x263/0x2b0 [ 84.785721][ T9844] do_error_trap+0x11b/0x200 [ 84.790406][ T9844] do_invalid_op+0x37/0x50 [ 84.794903][ T9844] ? smc_unhash_sk.cold+0x11/0x18 [ 84.799916][ T9844] invalid_op+0x23/0x30 [ 84.804102][ T9844] RIP: 0010:smc_unhash_sk.cold+0x11/0x18 [ 84.809718][ T9844] Code: 89 ff e8 3f 4b a6 fa e9 d7 f8 ff ff 4c 89 ff e8 32 4b a6 fa e9 57 fa ff ff e8 b8 3b 6c fa 48 c7 c7 a0 3b 42 88 e8 f0 da 55 fa <0f> 0b e9 ad 43 ff ff e8 a0 3b 6c fa 48 c7 c7 a0 3b 42 88 e8 d8 da [ 84.830179][ T9844] RSP: 0018:ffff888089cefba8 EFLAGS: 00010286 [ 84.836233][ T9844] RAX: 0000000000000024 RBX: ffff888092e33240 RCX: 0000000000000000 [ 84.844189][ T9844] RDX: 0000000000000000 RSI: ffffffff815c2576 RDI: ffffed101139df67 [ 84.852169][ T9844] RBP: ffff888089cefbd8 R08: 0000000000000024 R09: ffffed1015d060d1 [ 84.860127][ T9844] R10: ffffed1015d060d0 R11: ffff8880ae830687 R12: ffff888092e332c0 [ 84.868087][ T9844] R13: ffffffff8999e200 R14: ffff888092e33268 R15: 0000000000000001 [ 84.876164][ T9844] ? vprintk_func+0x86/0x189 [ 84.880746][ T9844] ? smc_unhash_sk.cold+0x11/0x18 [ 84.885759][ T9844] __smc_release+0x202/0x450 [ 84.890338][ T9844] smc_release+0x10c/0x380 [ 84.894740][ T9844] __sock_release+0xce/0x280 [ 84.899320][ T9844] sock_close+0x1e/0x30 [ 84.903480][ T9844] __fput+0x2ff/0x890 [ 84.907470][ T9844] ? __sock_release+0x280/0x280 [ 84.912329][ T9844] ____fput+0x16/0x20 [ 84.916306][ T9844] task_work_run+0x145/0x1c0 [ 84.920883][ T9844] do_exit+0x92f/0x2e50 [ 84.925046][ T9844] ? mm_update_next_owner+0x640/0x640 [ 84.930406][ T9844] ? down_read_non_owner+0x450/0x450 [ 84.935680][ T9844] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 84.941915][ T9844] ? handle_mm_fault+0x1d3/0x6b0 [ 84.946846][ T9844] do_group_exit+0x135/0x360 [ 84.951424][ T9844] __x64_sys_exit_group+0x44/0x50 [ 84.956440][ T9844] do_syscall_64+0xfd/0x6a0 [ 84.960932][ T9844] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.966810][ T9844] RIP: 0033:0x43ff28 [ 84.970694][ T9844] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 84.990607][ T9844] RSP: 002b:00007ffd8a6fd1a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 84.999003][ T9844] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ff28 [ 85.006974][ T9844] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 85.014943][ T9844] RBP: 00000000004bf750 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 85.022904][ T9844] R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000001 [ 85.030863][ T9844] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 85.040118][ T9844] Kernel Offset: disabled [ 85.044457][ T9844] Rebooting in 86400 seconds..