[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.233348] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.760824] random: sshd: uninitialized urandom read (32 bytes read) [ 29.091998] random: sshd: uninitialized urandom read (32 bytes read) [ 29.711741] random: sshd: uninitialized urandom read (32 bytes read) [ 29.930400] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.230' (ECDSA) to the list of known hosts. [ 46.613664] random: sshd: uninitialized urandom read (32 bytes read) [ 46.742258] kasan: CONFIG_KASAN_INLINE enabled [ 46.746966] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.754703] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.760928] CPU: 1 PID: 5569 Comm: syz-executor063 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 46.769493] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.778838] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 46.783575] 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 [ 46.802464] RSP: 0018:ffff8801d8fdf928 EFLAGS: 00010206 [ 46.807823] RAX: dffffc0000000000 RBX: ffff8801ccdc7340 RCX: ffffffff8160aca1 [ 46.815083] RDX: 0e0f2e8becaead8d RSI: ffffffff833deb15 RDI: 7079745f65756c69 [ 46.822379] RBP: ffff8801d8fdf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 46.829639] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b3e340 [ 46.836892] R13: 7079745f65756c61 R14: ffff8801ccdc73d8 R15: ffff8801ccdc73d8 [ 46.844143] FS: 0000000002272940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 46.852349] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.858213] CR2: 000000000046f720 CR3: 00000001d8c7a000 CR4: 00000000001406e0 [ 46.865466] Call Trace: [ 46.868047] vfs_get_tree+0x1cb/0x5c0 [ 46.871836] mq_create_mount+0xe3/0x190 [ 46.875792] mq_init_ns+0x15a/0x210 [ 46.879405] copy_ipcs+0x3d2/0x580 [ 46.882930] ? ipcns_get+0xe0/0xe0 [ 46.886459] ? do_mount+0x1db0/0x1db0 [ 46.890254] ? kmem_cache_alloc+0x33a/0x730 [ 46.894570] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.900122] ? perf_event_namespaces+0x136/0x400 [ 46.904876] create_new_namespaces+0x376/0x900 [ 46.909460] ? sys_ni_syscall+0x20/0x20 [ 46.913443] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.919032] ? ns_capable_common+0x13f/0x170 [ 46.923445] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 46.928387] ksys_unshare+0x79c/0x10b0 [ 46.932263] ? walk_process_tree+0x440/0x440 [ 46.936679] ? lock_downgrade+0x900/0x900 [ 46.940814] ? kasan_check_read+0x11/0x20 [ 46.945001] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.949405] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.953974] ? kasan_check_write+0x14/0x20 [ 46.958190] ? do_raw_read_unlock+0x3f/0x60 [ 46.962500] ? do_syscall_64+0x9a/0x820 [ 46.966452] ? do_syscall_64+0x9a/0x820 [ 46.970414] ? lockdep_hardirqs_on+0x421/0x5c0 [ 46.974978] ? trace_hardirqs_on+0xbd/0x310 [ 46.979288] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.984646] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 46.990083] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 46.994737] __x64_sys_unshare+0x31/0x40 [ 46.998789] do_syscall_64+0x1b9/0x820 [ 47.002663] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.008009] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.012928] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.017763] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.022761] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.027758] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.032759] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.037585] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.042754] RIP: 0033:0x446ee7 [ 47.045930] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6d d9 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 4d d9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 47.064812] RSP: 002b:00007ffeb9c0b648 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 47.072506] RAX: ffffffffffffffda RBX: 00007ffeb9c0bf30 RCX: 0000000000446ee7 [ 47.079822] RDX: 0000000000000000 RSI: 00007ffeb9c0b650 RDI: 0000000008000000 [ 47.087092] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000018 [ 47.094356] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000404cc0 [ 47.101604] R13: 0000000000404d50 R14: 0000000000000000 R15: 0000000000000000 [ 47.108905] Modules linked in: [ 47.112574] ---[ end trace 39f9061875c424e3 ]--- [ 47.117445] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 47.122195] 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 [ 47.141146] RSP: 0018:ffff8801d8fdf928 EFLAGS: 00010206 [ 47.146528] RAX: dffffc0000000000 RBX: ffff8801ccdc7340 RCX: ffffffff8160aca1 [ 47.153940] RDX: 0e0f2e8becaead8d RSI: ffffffff833deb15 RDI: 7079745f65756c69 [ 47.161198] RBP: ffff8801d8fdf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 47.168503] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b3e340 [ 47.175775] R13: 7079745f65756c61 R14: ffff8801ccdc73d8 R15: ffff8801ccdc73d8 [ 47.183063] FS: 0000000002272940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 47.191342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.197273] CR2: 000000000046f720 CR3: 00000001d8c7a000 CR4: 00000000001406e0 [ 47.204584] Kernel panic - not syncing: Fatal exception [ 47.210780] Kernel Offset: disabled [ 47.214402] Rebooting in 86400 seconds..