[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.907238][ T26] audit: type=1800 audit(1557895766.405:25): pid=8841 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.938195][ T26] audit: type=1800 audit(1557895766.405:26): pid=8841 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.958954][ T26] audit: type=1800 audit(1557895766.415:27): pid=8841 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 '10.128.10.25' (ECDSA) to the list of known hosts. 2019/05/15 04:49:35 fuzzer started 2019/05/15 04:49:38 connecting to host at 10.128.0.26:45499 2019/05/15 04:49:38 checking machine... 2019/05/15 04:49:38 checking revisions... 2019/05/15 04:49:38 testing simple program... syzkaller login: [ 74.963513][ T9007] IPVS: ftp: loaded support on port[0] = 21 2019/05/15 04:49:38 building call list... [ 76.265609][ T9012] can: request_module (can-proto-0) failed. [ 76.617320][ T2495] ------------[ cut here ]------------ [ 76.622935][ T2495] remove_proc_entry: removing non-empty directory 'net/rpc', leaking at least 'use-gss-proxy' [ 76.633468][ T2495] WARNING: CPU: 0 PID: 2495 at fs/proc/generic.c:681 remove_proc_entry+0x367/0x410 [ 76.642763][ T2495] Kernel panic - not syncing: panic_on_warn set ... [ 76.649373][ T2495] CPU: 0 PID: 2495 Comm: kworker/u4:3 Not tainted 5.1.0-next-20190515 #12 [ 76.657862][ T2495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.667939][ T2495] Workqueue: netns cleanup_net [ 76.672956][ T2495] Call Trace: [ 76.676266][ T2495] dump_stack+0x172/0x1f0 [ 76.680631][ T2495] ? remove_proc_entry+0x340/0x410 [ 76.685748][ T2495] panic+0x2cb/0x75a [ 76.689648][ T2495] ? __warn_printk+0xf3/0xf3 [ 76.694242][ T2495] ? remove_proc_entry+0x367/0x410 [ 76.699378][ T2495] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.705644][ T2495] ? __warn.cold+0x5/0x47 [ 76.709969][ T2495] ? __warn+0xe8/0x1d0 [ 76.714027][ T2495] ? remove_proc_entry+0x367/0x410 [ 76.719126][ T2495] __warn.cold+0x20/0x47 [ 76.723375][ T2495] ? vprintk_emit+0x1ea/0x700 [ 76.728054][ T2495] ? remove_proc_entry+0x367/0x410 [ 76.733156][ T2495] report_bug+0x263/0x2b0 [ 76.737483][ T2495] do_error_trap+0x11b/0x200 [ 76.742064][ T2495] do_invalid_op+0x37/0x50 [ 76.746465][ T2495] ? remove_proc_entry+0x367/0x410 [ 76.751578][ T2495] invalid_op+0x14/0x20 [ 76.755729][ T2495] RIP: 0010:remove_proc_entry+0x367/0x410 [ 76.761428][ T2495] Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4c 49 8b 95 d0 00 00 00 48 c7 c6 40 8d 97 87 48 c7 c7 c0 8c 97 87 e8 87 c9 6d ff <0f> 0b e9 4b fe ff ff e8 cd 56 d4 ff e9 b5 fd ff ff e8 83 57 d4 ff [ 76.781025][ T2495] RSP: 0018:ffff8880a37f7b10 EFLAGS: 00010286 [ 76.787168][ T2495] RAX: 0000000000000000 RBX: 1ffff110146fef64 RCX: 0000000000000000 [ 76.795155][ T2495] RDX: 0000000000000000 RSI: ffffffff815b2446 RDI: ffffed10146fef54 [ 76.803110][ T2495] RBP: ffff8880a37f7bc0 R08: ffff8880a37ea080 R09: ffff8880a37ea970 [ 76.811087][ T2495] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a78ebb80 [ 76.819074][ T2495] R13: ffff8880a55cc580 R14: ffff8880a78ebc30 R15: dffffc0000000000 [ 76.827050][ T2495] ? vprintk_func+0x86/0x189 [ 76.831626][ T2495] ? proc_readdir+0x80/0x80 [ 76.838900][ T2495] ? cache_destroy_net+0x3c/0x50 [ 76.843849][ T2495] rpc_proc_exit+0x3e/0x50 [ 76.848253][ T2495] sunrpc_exit_net+0x187/0x2d0 [ 76.853000][ T2495] ? xdr_free_bvec+0x70/0x70 [ 76.857581][ T2495] ops_exit_list.isra.0+0xb0/0x160 [ 76.862689][ T2495] cleanup_net+0x3fb/0x960 [ 76.867099][ T2495] ? netns_install+0x1d0/0x1d0 [ 76.871861][ T2495] process_one_work+0x98e/0x1790 [ 76.876788][ T2495] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.882163][ T2495] ? lock_acquire+0x16f/0x3f0 [ 76.886841][ T2495] worker_thread+0x98/0xe40 [ 76.891337][ T2495] ? trace_hardirqs_on+0x67/0x230 [ 76.896349][ T2495] kthread+0x357/0x430 [ 76.900404][ T2495] ? process_one_work+0x1790/0x1790 [ 76.905584][ T2495] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 76.911813][ T2495] ret_from_fork+0x3a/0x50 [ 76.917594][ T2495] Kernel Offset: disabled [ 76.922020][ T2495] Rebooting in 86400 seconds..