[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.422587] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.126150] random: sshd: uninitialized urandom read (32 bytes read) [ 22.545373] random: sshd: uninitialized urandom read (32 bytes read) [ 23.261515] random: sshd: uninitialized urandom read (32 bytes read) [ 23.398174] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. [ 28.837500] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.921859] IPVS: ftp: loaded support on port[0] = 21 [ 28.957291] kasan: CONFIG_KASAN_INLINE enabled [ 28.961997] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.969435] general protection fault: 0000 [#1] SMP KASAN [ 28.974994] CPU: 1 PID: 4463 Comm: syz-executor262 Not tainted 4.18.0-rc4-next-20180713+ #7 [ 28.983485] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.992862] RIP: 0010:list_lru_count_one+0x156/0x460 [ 28.997965] Code: 08 3c 03 0f 8e b5 02 00 00 4d 63 bd d8 0a 00 00 e8 7f 35 d2 ff 48 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d8 02 00 00 49 8d 46 c0 4c 8b 6b 50 48 ba 00 00 [ 29.017188] RSP: 0018:ffff8801ac1c7198 EFLAGS: 00010206 [ 29.022535] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3a64 [ 29.029784] RDX: 000000000000000a RSI: ffffffff81aa3ad1 RDI: 0000000000000050 [ 29.037035] RBP: ffff8801ac1c7228 R08: ffff8801abc0e300 R09: 0000000000000000 [ 29.044283] R10: ffffed003ae3e630 R11: ffff8801d71f3187 R12: 1ffff10035838e34 [ 29.051542] R13: ffff8801ad206a80 R14: ffff8801ac1c7200 R15: 0000000000000000 [ 29.058795] FS: 0000000000b1f880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 29.067000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.072867] CR2: 00000000006d2080 CR3: 00000001bbf42000 CR4: 00000000001406e0 [ 29.080119] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.087379] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.094625] Call Trace: [ 29.097200] ? list_lru_isolate_move+0x3c0/0x3c0 [ 29.101941] super_cache_count+0x153/0x2e0 [ 29.106157] ? __radix_tree_lookup+0x491/0x610 [ 29.110718] do_shrink_slab+0x148/0xc50 [ 29.114675] ? node_tag_get.constprop.17+0xa0/0xa0 [ 29.119584] ? snapshot_refaults+0x290/0x290 [ 29.123969] ? inactive_list_is_low+0x2f9/0x850 [ 29.128616] ? shrink_slab+0x1f3/0xa60 [ 29.132513] ? downgrade_write+0x2b0/0x2b0 [ 29.136768] ? throttle_direct_reclaim+0x9f0/0x9f0 [ 29.141678] ? radix_tree_lookup+0x21/0x30 [ 29.145889] shrink_slab+0x861/0xa60 [ 29.149586] ? unregister_memcg_shrinker.isra.39+0x50/0x50 [ 29.155190] ? try_to_wake_up+0x10a/0x12b0 [ 29.159405] ? is_bpf_text_address+0xd7/0x170 [ 29.164412] ? trace_hardirqs_on+0x10/0x10 [ 29.168628] ? __radix_tree_lookup+0x491/0x610 [ 29.173189] shrink_node+0x429/0x16a0 [ 29.176977] ? shrink_node_memcg+0x18f0/0x18f0 [ 29.181539] ? kvm_clock_read+0x25/0x30 [ 29.185494] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 29.190489] ? ktime_get_raw_ts64+0x4f0/0x4f0 [ 29.194962] ? kasan_check_read+0x11/0x20 [ 29.199088] ? do_raw_spin_unlock+0xa7/0x2f0 [ 29.203476] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 29.208038] ? kasan_check_write+0x14/0x20 [ 29.212259] ? do_raw_spin_lock+0xc1/0x200 [ 29.216474] do_try_to_free_pages+0x3e7/0x1290 [ 29.221038] ? shrink_node+0x16a0/0x16a0 [ 29.225078] ? lock_acquire+0x1e4/0x540 [ 29.229031] ? lock_acquire+0x1e4/0x540 [ 29.232985] ? lock_downgrade+0x8f0/0x8f0 [ 29.237114] try_to_free_mem_cgroup_pages+0x49d/0xc90 [ 29.242285] ? kasan_check_read+0x11/0x20 [ 29.246410] ? try_to_free_pages+0xb80/0xb80 [ 29.250798] ? kasan_check_read+0x11/0x20 [ 29.254925] ? trace_hardirqs_off+0xd/0x10 [ 29.259139] ? trace_hardirqs_on+0xd/0x10 [ 29.263267] ? cgroup_file_notify+0x226/0x2f0 [ 29.267741] ? cgroup_procs_write_finish+0xf0/0xf0 [ 29.272649] ? do_raw_spin_lock+0xc1/0x200 [ 29.276868] ? get_mem_cgroup_from_mm+0x209/0x440 [ 29.281694] reclaim_high.constprop.73+0x137/0x1e0 [ 29.286601] ? memcg_oom_wake_function+0x6b0/0x6b0 [ 29.291511] ? done_path_create+0xcc/0x110 [ 29.295733] mem_cgroup_handle_over_high+0x8d/0x130 [ 29.300728] exit_to_usermode_loop+0x287/0x380 [ 29.305288] ? syscall_slow_exit_work+0x500/0x500 [ 29.310113] do_syscall_64+0x6be/0x820 [ 29.313980] ? syscall_return_slowpath+0x5e0/0x5e0 [ 29.318888] ? syscall_return_slowpath+0x31d/0x5e0 [ 29.323796] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 29.328790] ? prepare_exit_to_usermode+0x291/0x3b0 [ 29.333796] ? perf_trace_sys_enter+0xb10/0xb10 [ 29.338446] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.343269] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.348435] RIP: 0033:0x444d67 [ 29.351611] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 6d d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 29.370861] RSP: 002b:00007ffe2fca70c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 29.378548] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000444d67 [ 29.385794] RDX: 00007ffe2fca70e3 RSI: 00000000000001ff RDI: 00007ffe2fca70e0 [ 29.393041] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 29.400299] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000001 [ 29.407550] R13: 0000000000007113 R14: 0000000000000000 R15: 0000000000000000 [ 29.414810] Modules linked in: [ 29.417985] Dumping ftrace buffer: [ 29.421500] (ftrace buffer empty) [ 29.425432] ---[ end trace 3f97d7c74237f806 ]--- [ 29.430225] RIP: 0010:list_lru_count_one+0x156/0x460 [ 29.435382] Code: 08 3c 03 0f 8e b5 02 00 00 4d 63 bd d8 0a 00 00 e8 7f 35 d2 ff 48 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d8 02 00 00 49 8d 46 c0 4c 8b 6b 50 48 ba 00 00 [ 29.454690] RSP: 0018:ffff8801ac1c7198 EFLAGS: 00010206 [ 29.460066] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3a64 [ 29.467352] RDX: 000000000000000a RSI: ffffffff81aa3ad1 RDI: 0000000000000050 [ 29.474632] RBP: ffff8801ac1c7228 R08: ffff8801abc0e300 R09: 0000000000000000 [ 29.482276] R10: ffffed003ae3e630 R11: ffff8801d71f3187 R12: 1ffff10035838e34 [ 29.489553] R13: ffff8801ad206a80 R14: ffff8801ac1c7200 R15: 0000000000000000 [ 29.496846] FS: 0000000000b1f880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 29.505080] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.510977] CR2: 00000000006d2080 CR3: 00000001bbf42000 CR4: 00000000001406e0 [ 29.518265] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.525536] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.532826] Kernel panic - not syncing: Fatal exception [ 29.538641] Dumping ftrace buffer: [ 29.542162] (ftrace buffer empty) [ 29.545857] Kernel Offset: disabled [ 29.549465] Rebooting in 86400 seconds..