[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.634936] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 26.192820] random: sshd: uninitialized urandom read (32 bytes read) [ 26.525358] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.135664] random: sshd: uninitialized urandom read (32 bytes read) [ 27.346708] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.234' (ECDSA) to the list of known hosts. [ 33.013144] random: sshd: uninitialized urandom read (32 bytes read) [ 33.141080] kasan: CONFIG_KASAN_INLINE enabled [ 33.145789] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.153694] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.159931] CPU: 1 PID: 5555 Comm: syz-executor759 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 33.168485] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.177838] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 33.182579] Code: 4c 8d b3 98 00 00 00 4d 85 ed 0f 84 d1 00 00 00 e8 6b 44 3f fe 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 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 [ 33.201479] RSP: 0018:ffff8801d8487928 EFLAGS: 00010a02 [ 33.206825] RAX: dffffc0000000000 RBX: ffff8801cd7f2280 RCX: ffffffff8160aca1 [ 33.214077] RDX: 1bffff8000000001 RSI: ffffffff833deb15 RDI: dffffc0000000008 [ 33.221333] RBP: ffff8801d8487948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 33.228586] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a28700 [ 33.235838] R13: dffffc0000000000 R14: ffff8801cd7f2318 R15: ffff8801cd7f2318 [ 33.243090] FS: 0000000002094880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 33.251298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.257164] CR2: 00000000004748c0 CR3: 00000001c2a38000 CR4: 00000000001406e0 [ 33.264442] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.271694] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.278948] Call Trace: [ 33.281521] vfs_get_tree+0x1cb/0x5c0 [ 33.285308] mq_create_mount+0xe3/0x190 [ 33.289323] mq_init_ns+0x15a/0x210 [ 33.292931] copy_ipcs+0x3d2/0x580 [ 33.296459] ? ipcns_get+0xe0/0xe0 [ 33.299981] ? do_mount+0x1db0/0x1db0 [ 33.303762] ? kmem_cache_alloc+0x33a/0x730 [ 33.308065] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.313584] ? perf_event_namespaces+0x136/0x400 [ 33.318332] create_new_namespaces+0x376/0x900 [ 33.322901] ? sys_ni_syscall+0x20/0x20 [ 33.326857] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.332376] ? ns_capable_common+0x13f/0x170 [ 33.336766] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 33.341679] ksys_unshare+0x79c/0x10b0 [ 33.345550] ? walk_process_tree+0x440/0x440 [ 33.349941] ? lock_downgrade+0x900/0x900 [ 33.354072] ? kasan_check_read+0x11/0x20 [ 33.358216] ? do_raw_spin_unlock+0xa7/0x2f0 [ 33.362607] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 33.367171] ? kasan_check_write+0x14/0x20 [ 33.371386] ? do_raw_read_unlock+0x3f/0x60 [ 33.375711] ? do_syscall_64+0x9a/0x820 [ 33.379668] ? do_syscall_64+0x9a/0x820 [ 33.383641] ? lockdep_hardirqs_on+0x421/0x5c0 [ 33.388205] ? trace_hardirqs_on+0xbd/0x310 [ 33.392507] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.397856] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 33.403299] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 33.407959] __x64_sys_unshare+0x31/0x40 [ 33.412000] do_syscall_64+0x1b9/0x820 [ 33.415871] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 33.421219] ? syscall_return_slowpath+0x5e0/0x5e0 [ 33.426220] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.431051] ? trace_hardirqs_on_caller+0x310/0x310 [ 33.436053] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 33.441049] ? prepare_exit_to_usermode+0x291/0x3b0 [ 33.446046] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.450876] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.456049] RIP: 0033:0x44b857 [ 33.459225] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd d5 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 9d d5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 33.478108] RSP: 002b:00007fff8d374ad8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 33.485799] RAX: ffffffffffffffda RBX: 00007fff8d375610 RCX: 000000000044b857 [ 33.493227] RDX: 0000000000000000 RSI: 00007fff8d374af0 RDI: 0000000008000000 [ 33.500478] RBP: 00000000006de018 R08: 0000000000000000 R09: 0000000000000018 [ 33.507729] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000409280 [ 33.514982] R13: 0000000000409310 R14: 0000000000000000 R15: 0000000000000000 [ 33.522237] Modules linked in: [ 33.525985] ---[ end trace 01e2ddf568e2c8cc ]--- [ 33.530756] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 33.535561] Code: 4c 8d b3 98 00 00 00 4d 85 ed 0f 84 d1 00 00 00 e8 6b 44 3f fe 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 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 [ 33.554517] RSP: 0018:ffff8801d8487928 EFLAGS: 00010a02 [ 33.559877] RAX: dffffc0000000000 RBX: ffff8801cd7f2280 RCX: ffffffff8160aca1 [ 33.567185] RDX: 1bffff8000000001 RSI: ffffffff833deb15 RDI: dffffc0000000008 [ 33.574472] RBP: ffff8801d8487948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 33.581726] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a28700 [ 33.589047] R13: dffffc0000000000 R14: ffff8801cd7f2318 R15: ffff8801cd7f2318 [ 33.596349] FS: 0000000002094880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 33.604715] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.610594] CR2: 00000000004748c0 CR3: 00000001c2a38000 CR4: 00000000001406e0 [ 33.617895] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.625191] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.632497] Kernel panic - not syncing: Fatal exception [ 33.639038] Kernel Offset: disabled [ 33.642664] Rebooting in 86400 seconds..