[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.397524] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 24.977571] random: sshd: uninitialized urandom read (32 bytes read) [ 25.300997] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.913824] random: sshd: uninitialized urandom read (32 bytes read) [ 26.126167] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.49' (ECDSA) to the list of known hosts. [ 31.705221] random: sshd: uninitialized urandom read (32 bytes read) [ 31.843681] kasan: CONFIG_KASAN_INLINE enabled [ 31.848413] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.856057] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 31.862296] CPU: 1 PID: 5570 Comm: syz-executor558 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 31.870866] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.880242] RIP: 0010:mqueue_get_tree+0xdd/0x2e0 [ 31.884998] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 08 49 8d 7d 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b6 01 00 00 4d 8b 6d 68 4d 85 ed 74 11 e8 1b 44 [ 31.903927] RSP: 0018:ffff8801c7b4f928 EFLAGS: 00010202 [ 31.909299] RAX: dffffc0000000000 RBX: ffff8801cd34d280 RCX: ffffffff8160aca1 [ 31.916595] RDX: 000000200000000d RSI: ffffffff833deb15 RDI: 0000010000000068 [ 31.923860] RBP: ffff8801c7b4f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 31.931126] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a85380 [ 31.938392] R13: 0000010000000000 R14: ffff8801cd34d318 R15: ffff8801cd34d318 [ 31.945684] FS: 0000000001d9c880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 31.953927] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.959816] CR2: 000000000046eb60 CR3: 00000001d8b34000 CR4: 00000000001406e0 [ 31.967081] Call Trace: [ 31.969694] vfs_get_tree+0x1cb/0x5c0 [ 31.973520] mq_create_mount+0xe3/0x190 [ 31.977519] mq_init_ns+0x15a/0x210 [ 31.981145] copy_ipcs+0x3d2/0x580 [ 31.984724] ? ipcns_get+0xe0/0xe0 [ 31.988267] ? do_mount+0x1db0/0x1db0 [ 31.992086] ? kmem_cache_alloc+0x33a/0x730 [ 31.996409] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.001964] ? perf_event_namespaces+0x136/0x400 [ 32.006769] create_new_namespaces+0x376/0x900 [ 32.011368] ? sys_ni_syscall+0x20/0x20 [ 32.015366] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.020917] ? ns_capable_common+0x13f/0x170 [ 32.025361] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 32.030298] ksys_unshare+0x79c/0x10b0 [ 32.034190] ? walk_process_tree+0x440/0x440 [ 32.038618] ? lock_downgrade+0x900/0x900 [ 32.042789] ? kasan_check_read+0x11/0x20 [ 32.046934] ? do_raw_spin_unlock+0xa7/0x2f0 [ 32.051366] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 32.055954] ? kasan_check_write+0x14/0x20 [ 32.060194] ? do_raw_read_unlock+0x3f/0x60 [ 32.064536] ? do_syscall_64+0x9a/0x820 [ 32.068526] ? do_syscall_64+0x9a/0x820 [ 32.072519] ? lockdep_hardirqs_on+0x421/0x5c0 [ 32.077107] ? trace_hardirqs_on+0xbd/0x310 [ 32.081457] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.086828] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 32.092278] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 32.096963] __x64_sys_unshare+0x31/0x40 [ 32.101036] do_syscall_64+0x1b9/0x820 [ 32.104952] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 32.110371] ? syscall_return_slowpath+0x5e0/0x5e0 [ 32.115326] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.120219] ? trace_hardirqs_on_caller+0x310/0x310 [ 32.125253] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 32.130285] ? prepare_exit_to_usermode+0x291/0x3b0 [ 32.135306] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.140152] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.145358] RIP: 0033:0x4461f7 [ 32.148580] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 2d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 32.167509] RSP: 002b:00007ffdf1df5a58 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 32.175449] RAX: ffffffffffffffda RBX: 00007ffdf1df6150 RCX: 00000000004461f7 [ 32.182824] RDX: 0000000000000000 RSI: 00007ffdf1df5a60 RDI: 0000000008000000 [ 32.190093] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000000000018 [ 32.197440] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 32.205020] R13: 0000000000403e20 R14: 0000000000000000 R15: 0000000000000000 [ 32.212318] Modules linked in: [ 32.215690] ---[ end trace b94fa73c17910699 ]--- [ 32.220497] RIP: 0010:mqueue_get_tree+0xdd/0x2e0 [ 32.225286] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 08 49 8d 7d 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b6 01 00 00 4d 8b 6d 68 4d 85 ed 74 11 e8 1b 44 [ 32.244229] RSP: 0018:ffff8801c7b4f928 EFLAGS: 00010202 [ 32.249647] RAX: dffffc0000000000 RBX: ffff8801cd34d280 RCX: ffffffff8160aca1 [ 32.256940] RDX: 000000200000000d RSI: ffffffff833deb15 RDI: 0000010000000068 [ 32.264241] RBP: ffff8801c7b4f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 32.271548] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a85380 [ 32.278834] R13: 0000010000000000 R14: ffff8801cd34d318 R15: ffff8801cd34d318 [ 32.286185] FS: 0000000001d9c880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 32.294462] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.300356] CR2: 000000000046eb60 CR3: 00000001d8b34000 CR4: 00000000001406e0 [ 32.307654] Kernel panic - not syncing: Fatal exception [ 32.313842] Kernel Offset: disabled [ 32.317466] Rebooting in 86400 seconds..