[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 26.228397] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.486090] random: sshd: uninitialized urandom read (32 bytes read) [ 30.786903] random: sshd: uninitialized urandom read (32 bytes read) [ 31.421613] random: sshd: uninitialized urandom read (32 bytes read) [ 31.639067] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 37.263580] random: sshd: uninitialized urandom read (32 bytes read) [ 37.404896] kasan: CONFIG_KASAN_INLINE enabled [ 37.409407] IPVS: ftp: loaded support on port[0] = 21 [ 37.409605] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.422374] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.428611] CPU: 0 PID: 5578 Comm: syz-executor599 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 37.437175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.446539] RIP: 0010:mqueue_get_tree+0xdd/0x2e0 [ 37.451294] 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 [ 37.470189] RSP: 0018:ffff8801d8e07928 EFLAGS: 00010a02 [ 37.475547] RAX: dffffc0000000000 RBX: ffff8801cc857cc0 RCX: ffffffff8160aca1 [ 37.482813] RDX: 1bd5a9d5a000000d RSI: ffffffff833deb15 RDI: dead4ead00000068 [ 37.490076] RBP: ffff8801d8e07948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.497340] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a2dbc0 [ 37.504603] R13: dead4ead00000000 R14: ffff8801cc857d58 R15: ffff8801cc857d58 [ 37.511960] FS: 00000000021ab880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 37.521394] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.527271] CR2: 00000000004724c0 CR3: 00000001beea0000 CR4: 00000000001406f0 [ 37.534540] Call Trace: [ 37.537139] vfs_get_tree+0x1cb/0x5c0 [ 37.540947] mq_create_mount+0xe3/0x190 [ 37.544927] mq_init_ns+0x15a/0x210 [ 37.549210] copy_ipcs+0x3d2/0x580 [ 37.552751] ? ipcns_get+0xe0/0xe0 [ 37.556299] ? do_mount+0x1db0/0x1db0 [ 37.560095] ? kmem_cache_alloc+0x33a/0x730 [ 37.564420] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.569960] ? perf_event_namespaces+0x136/0x400 [ 37.574722] create_new_namespaces+0x376/0x900 [ 37.579310] ? sys_ni_syscall+0x20/0x20 [ 37.583286] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.589231] ? ns_capable_common+0x13f/0x170 [ 37.593646] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 37.598590] ksys_unshare+0x79c/0x10b0 [ 37.602481] ? walk_process_tree+0x440/0x440 [ 37.606896] ? lock_downgrade+0x900/0x900 [ 37.611049] ? kasan_check_read+0x11/0x20 [ 37.615203] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.619634] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.624223] ? kasan_check_write+0x14/0x20 [ 37.628457] ? do_raw_read_unlock+0x3f/0x60 [ 37.632786] ? do_syscall_64+0x9a/0x820 [ 37.636760] ? do_syscall_64+0x9a/0x820 [ 37.640746] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.645334] ? trace_hardirqs_on+0xbd/0x310 [ 37.649657] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.655031] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 37.660480] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 37.665154] __x64_sys_unshare+0x31/0x40 [ 37.669218] do_syscall_64+0x1b9/0x820 [ 37.673105] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.678473] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.683403] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.688249] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.693261] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.698283] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.703302] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.708155] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.713342] RIP: 0033:0x449517 [ 37.716541] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d dc 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 5d dc fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.735445] RSP: 002b:00007ffc1d15e748 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 37.743154] RAX: ffffffffffffffda RBX: 00007ffc1d15e7c0 RCX: 0000000000449517 [ 37.750419] RDX: 0000000000000000 RSI: 00007ffc1d15e750 RDI: 0000000008000000 [ 37.757691] RBP: 585858582e72656c R08: 0000000000000000 R09: 00000000021ab880 [ 37.764963] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 37.772228] R13: 0000000000407690 R14: 0000000000000000 R15: 0000000000000000 [ 37.779501] Modules linked in: [ 37.782782] ---[ end trace 7d49074aa7a90992 ]--- [ 37.787575] RIP: 0010:mqueue_get_tree+0xdd/0x2e0 [ 37.792336] 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 [ 37.811285] RSP: 0018:ffff8801d8e07928 EFLAGS: 00010a02 [ 37.816692] RAX: dffffc0000000000 RBX: ffff8801cc857cc0 RCX: ffffffff8160aca1 [ 37.823997] RDX: 1bd5a9d5a000000d RSI: ffffffff833deb15 RDI: dead4ead00000068 [ 37.831273] RBP: ffff8801d8e07948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.838575] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a2dbc0 [ 37.845873] R13: dead4ead00000000 R14: ffff8801cc857d58 R15: ffff8801cc857d58 [ 37.853148] FS: 00000000021ab880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 37.861407] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.867311] CR2: 00000000004724c0 CR3: 00000001beea0000 CR4: 00000000001406f0 [ 37.874612] Kernel panic - not syncing: Fatal exception [ 37.880872] Kernel Offset: disabled [ 37.884497] Rebooting in 86400 seconds..