[ 37.314289][ T27] audit: type=1800 audit(1552729284.029:28): pid=7630 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 38.081984][ T27] audit: type=1800 audit(1552729284.869:29): pid=7630 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 [ 38.102510][ T27] audit: type=1800 audit(1552729284.869:30): pid=7630 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.811118][ T7804] IPVS: ftp: loaded support on port[0] = 21 [ 63.848315][ T7804] [ 63.850640][ T7804] ================================================ [ 63.857112][ T7804] WARNING: lock held when returning to user space! [ 63.863591][ T7804] 5.0.0+ #124 Not tainted [ 63.867897][ T7804] ------------------------------------------------ [ 63.874381][ T7804] syz-executor528/7804 is leaving the kernel with locks still held! [ 63.882353][ T7804] 1 lock held by syz-executor528/7804: [ 63.887778][ T7804] #0: 0000000080d6340f (rcu_read_lock){....}, at: tun_get_user+0x12d1/0x3f10 [ 63.896811][ T7804] WARNING: CPU: 1 PID: 7804 at kernel/rcu/tree_plugin.h:314 rcu_note_context_switch+0x32c/0x1750 [ 63.907308][ T7804] Kernel panic - not syncing: panic_on_warn set ... [ 63.913867][ T7804] CPU: 1 PID: 7804 Comm: syz-executor528 Not tainted 5.0.0+ #124 [ 63.921567][ T7804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.931591][ T7804] Call Trace: [ 63.934863][ T7804] dump_stack+0x172/0x1f0 [ 63.939361][ T7804] ? rcu_note_context_switch+0x280/0x1750 [ 63.945058][ T7804] panic+0x2cb/0x65c [ 63.948933][ T7804] ? __warn_printk+0xf3/0xf3 [ 63.953509][ T7804] ? rcu_note_context_switch+0x32c/0x1750 [ 63.959321][ T7804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.965570][ T7804] ? __warn.cold+0x5/0x45 [ 63.969882][ T7804] ? __warn+0xe8/0x1d0 [ 63.973946][ T7804] ? rcu_note_context_switch+0x32c/0x1750 [ 63.979643][ T7804] __warn.cold+0x20/0x45 [ 63.983862][ T7804] ? rcu_note_context_switch+0x32c/0x1750 [ 63.989565][ T7804] report_bug+0x263/0x2b0 [ 63.993871][ T7804] do_error_trap+0x11b/0x200 [ 63.998442][ T7804] do_invalid_op+0x37/0x50 [ 64.002828][ T7804] ? rcu_note_context_switch+0x32c/0x1750 [ 64.008516][ T7804] invalid_op+0x14/0x20 [ 64.012671][ T7804] RIP: 0010:rcu_note_context_switch+0x32c/0x1750 [ 64.018971][ T7804] Code: 8b 13 48 85 d2 75 c0 48 8b 5d c8 65 ff 0d fc 58 a3 7e 0f 85 41 fd ff ff e8 22 d2 a1 ff e9 37 fd ff ff 85 d2 0f 8e e3 00 00 00 <0f> 0b e9 50 fe ff ff 65 8b 05 76 ec a2 7e 83 f8 3f 0f 87 41 0a 00 [ 64.038550][ T7804] RSP: 0000:ffff8880a5a47d60 EFLAGS: 00010002 [ 64.044593][ T7804] RAX: ffffffff895e3e18 RBX: ffff8880ae92dd80 RCX: 1ffff11014989946 [ 64.052558][ T7804] RDX: 0000000000000001 RSI: ffffffff8330d1fc RDI: ffff8880a4c4ca30 [ 64.060507][ T7804] RBP: ffff8880a5a47dd8 R08: 0000000000000000 R09: ffffed1015d25bc8 [ 64.068452][ T7804] R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 0000000000000000 [ 64.076395][ T7804] R13: 000000000002cf80 R14: ffff8880a4c4c6c0 R15: ffff8880a4c4c6c0 [ 64.084360][ T7804] ? debug_smp_processor_id+0x3c/0x280 [ 64.089796][ T7804] ? schedule+0x92/0x180 [ 64.094011][ T7804] ? trace_hardirqs_off+0x62/0x220 [ 64.099096][ T7804] __schedule+0x1f4/0x1cc0 [ 64.103487][ T7804] ? printk+0xba/0xed [ 64.107444][ T7804] ? __sched_text_start+0x8/0x8 [ 64.112266][ T7804] ? add_lock_to_list.isra.0.cold+0x18/0x18 [ 64.118139][ T7804] ? tun_get_user+0x12d1/0x3f10 [ 64.122966][ T7804] schedule+0x92/0x180 [ 64.127012][ T7804] exit_to_usermode_loop+0x195/0x2c0 [ 64.132285][ T7804] prepare_exit_to_usermode+0x279/0x2e0 [ 64.137811][ T7804] retint_user+0x8/0x18 [ 64.141985][ T7804] RIP: 0033:0x4413a0 [ 64.145869][ T7804] Code: 05 48 3d 01 f0 ff ff 0f 83 3d 0f fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 71 8c 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 14 0f fc ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 64.165473][ T7804] RSP: 002b:00007ffff9f61888 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 64.173863][ T7804] RAX: fffffffffffffffb RBX: 00007ffff9f618a0 RCX: 00000000004413a0 [ 64.181826][ T7804] RDX: 0000000000000001 RSI: 00007ffff9f618c0 RDI: 00000000000000f0 [ 64.189900][ T7804] RBP: 0000000000000003 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 64.197851][ T7804] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a89d0 [ 64.205902][ T7804] R13: 00000000004027d0 R14: 0000000000000000 R15: 0000000000000000 [ 64.214530][ T7804] Kernel Offset: disabled [ 64.218843][ T7804] Rebooting in 86400 seconds..