[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.202804] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.813983] random: sshd: uninitialized urandom read (32 bytes read) [ 18.227352] random: sshd: uninitialized urandom read (32 bytes read) [ 18.942233] random: sshd: uninitialized urandom read (32 bytes read) [ 31.214837] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. [ 36.666659] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 36.755290] IPVS: ftp: loaded support on port[0] = 21 [ 36.788884] kasan: CONFIG_KASAN_INLINE enabled [ 36.793595] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.801004] general protection fault: 0000 [#1] SMP KASAN [ 36.806530] CPU: 0 PID: 4462 Comm: syz-executor763 Not tainted 4.18.0-rc4-next-20180713+ #7 [ 36.815877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.825256] RIP: 0010:list_lru_count_one+0x156/0x460 [ 36.830336] 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 [ 36.849471] RSP: 0018:ffff8801ac967198 EFLAGS: 00010206 [ 36.854819] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3a64 [ 36.862074] RDX: 000000000000000a RSI: ffffffff81aa3ad1 RDI: 0000000000000050 [ 36.869330] RBP: ffff8801ac967228 R08: ffff8801af1c6300 R09: 0000000000000000 [ 36.876669] R10: ffffed00359e0088 R11: ffff8801acf00447 R12: 1ffff1003592ce34 [ 36.883920] R13: ffff8801ad6aa080 R14: ffff8801ac967200 R15: 0000000000000000 [ 36.891169] FS: 000000000206b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.899375] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.905236] CR2: 00000000006ce080 CR3: 00000001ae3c1000 CR4: 00000000001406f0 [ 36.912487] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.919737] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.926994] Call Trace: [ 36.929569] ? list_lru_isolate_move+0x3c0/0x3c0 [ 36.934318] super_cache_count+0x153/0x2e0 [ 36.938533] ? __radix_tree_lookup+0x491/0x610 [ 36.943105] do_shrink_slab+0x148/0xc50 [ 36.947066] ? node_tag_get.constprop.17+0xa0/0xa0 [ 36.951984] ? snapshot_refaults+0x290/0x290 [ 36.956372] ? inactive_list_is_low+0x2f9/0x850 [ 36.961022] ? shrink_slab+0x1f3/0xa60 [ 36.964899] ? downgrade_write+0x2b0/0x2b0 [ 36.969116] ? throttle_direct_reclaim+0x9f0/0x9f0 [ 36.974059] ? radix_tree_lookup+0x21/0x30 [ 36.978276] shrink_slab+0x861/0xa60 [ 36.981986] ? unregister_memcg_shrinker.isra.39+0x50/0x50 [ 36.987685] ? try_to_wake_up+0x10a/0x12b0 [ 36.991911] ? is_bpf_text_address+0xd7/0x170 [ 36.996393] ? trace_hardirqs_on+0x10/0x10 [ 37.000614] ? __radix_tree_lookup+0x491/0x610 [ 37.005181] shrink_node+0x429/0x16a0 [ 37.008970] ? shrink_node_memcg+0x18f0/0x18f0 [ 37.013635] ? kvm_clock_read+0x25/0x30 [ 37.017593] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 37.022589] ? ktime_get_raw_ts64+0x4f0/0x4f0 [ 37.027083] ? kasan_check_read+0x11/0x20 [ 37.031207] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.035595] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.040154] ? kasan_check_write+0x14/0x20 [ 37.044366] ? do_raw_spin_lock+0xc1/0x200 [ 37.048583] do_try_to_free_pages+0x3e7/0x1290 [ 37.053164] ? shrink_node+0x16a0/0x16a0 [ 37.057221] ? lock_acquire+0x1e4/0x540 [ 37.061176] ? lock_acquire+0x1e4/0x540 [ 37.065134] ? lock_downgrade+0x8f0/0x8f0 [ 37.069271] try_to_free_mem_cgroup_pages+0x49d/0xc90 [ 37.074535] ? kasan_check_read+0x11/0x20 [ 37.078664] ? try_to_free_pages+0xb80/0xb80 [ 37.083064] ? kasan_check_read+0x11/0x20 [ 37.087205] ? trace_hardirqs_off+0xd/0x10 [ 37.091419] ? trace_hardirqs_on+0xd/0x10 [ 37.095546] ? cgroup_file_notify+0x226/0x2f0 [ 37.100026] ? cgroup_procs_write_finish+0xf0/0xf0 [ 37.104931] ? do_raw_spin_lock+0xc1/0x200 [ 37.109146] ? get_mem_cgroup_from_mm+0x209/0x440 [ 37.113965] reclaim_high.constprop.73+0x137/0x1e0 [ 37.118877] ? memcg_oom_wake_function+0x6b0/0x6b0 [ 37.123807] ? done_path_create+0xcc/0x110 [ 37.128031] mem_cgroup_handle_over_high+0x8d/0x130 [ 37.133034] exit_to_usermode_loop+0x287/0x380 [ 37.137596] ? syscall_slow_exit_work+0x500/0x500 [ 37.142431] do_syscall_64+0x6be/0x820 [ 37.146309] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.151232] ? syscall_return_slowpath+0x31d/0x5e0 [ 37.156147] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.161148] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.166148] ? perf_trace_sys_enter+0xb10/0xb10 [ 37.170798] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.175626] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.180811] RIP: 0033:0x440ec7 [ 37.183986] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6d 14 fc 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 4d 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.203128] RSP: 002b:00007ffe197f4e98 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 37.210951] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000440ec7 [ 37.218200] RDX: 00007ffe197f4eb3 RSI: 00000000000001ff RDI: 00007ffe197f4eb0 [ 37.225452] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 37.232711] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000001 [ 37.239967] R13: 0000000000008fab R14: 0000000000000000 R15: 0000000000000000 [ 37.247225] Modules linked in: [ 37.250407] Dumping ftrace buffer: [ 37.254442] (ftrace buffer empty) [ 37.258385] ---[ end trace 82052695a1b5b84c ]--- [ 37.263264] RIP: 0010:list_lru_count_one+0x156/0x460 [ 37.268377] 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 [ 37.287569] RSP: 0018:ffff8801ac967198 EFLAGS: 00010206 [ 37.292937] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3a64 [ 37.300219] RDX: 000000000000000a RSI: ffffffff81aa3ad1 RDI: 0000000000000050 [ 37.307490] RBP: ffff8801ac967228 R08: ffff8801af1c6300 R09: 0000000000000000 [ 37.314779] R10: ffffed00359e0088 R11: ffff8801acf00447 R12: 1ffff1003592ce34 [ 37.322052] R13: ffff8801ad6aa080 R14: ffff8801ac967200 R15: 0000000000000000 [ 37.329341] FS: 000000000206b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 37.337575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.343465] CR2: 00000000006ce080 CR3: 00000001ae3c1000 CR4: 00000000001406f0 [ 37.350754] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.358034] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.365315] Kernel panic - not syncing: Fatal exception [ 37.371075] Dumping ftrace buffer: [ 37.374595] (ftrace buffer empty) [ 37.378286] Kernel Offset: disabled [ 37.381897] Rebooting in 86400 seconds..