[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.519625] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.743241] random: sshd: uninitialized urandom read (32 bytes read) [ 30.169371] random: sshd: uninitialized urandom read (32 bytes read) [ 30.778049] random: sshd: uninitialized urandom read (32 bytes read) [ 30.987402] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts. [ 36.536018] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/12 19:20:37 parsed 1 programs [ 37.908188] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/12 19:20:40 executed programs: 0 [ 39.530462] kasan: CONFIG_KASAN_INLINE enabled [ 39.535219] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.542664] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.548899] CPU: 0 PID: 5572 Comm: syz-executor2 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 39.557293] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.566658] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 39.571413] 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 [ 39.590314] RSP: 0018:ffff8801bb9df928 EFLAGS: 00010203 [ 39.595675] RAX: dffffc0000000000 RBX: ffff8801cbc17540 RCX: ffffffff8160aca1 [ 39.602936] RDX: 0eadad2f0c2dacae RSI: ffffffff833deb15 RDI: 756d6978616d6574 [ 39.610207] RBP: ffff8801bb9df948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 39.617476] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b11e80 [ 39.624741] R13: 756d6978616d656c R14: ffff8801cbc175d8 R15: ffff8801cbc175d8 [ 39.632022] FS: 0000000001c11940(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 39.640243] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.646117] CR2: 0000000000482e00 CR3: 00000001bc1b0000 CR4: 00000000001406f0 [ 39.653383] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.660647] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.667912] Call Trace: [ 39.670504] vfs_get_tree+0x1cb/0x5c0 [ 39.674308] mq_create_mount+0xe3/0x190 [ 39.678283] mq_init_ns+0x15a/0x210 [ 39.681909] copy_ipcs+0x3d2/0x580 [ 39.685446] ? ipcns_get+0xe0/0xe0 [ 39.688984] ? do_mount+0x1db0/0x1db0 [ 39.692784] ? kmem_cache_alloc+0x33a/0x730 [ 39.697112] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.702644] ? perf_event_namespaces+0x136/0x400 [ 39.707400] create_new_namespaces+0x376/0x900 [ 39.711987] ? sys_ni_syscall+0x20/0x20 [ 39.715960] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.721497] ? ns_capable_common+0x13f/0x170 [ 39.725908] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 39.730841] ksys_unshare+0x79c/0x10b0 [ 39.734727] ? walk_process_tree+0x440/0x440 [ 39.739149] ? lock_downgrade+0x900/0x900 [ 39.743300] ? kasan_check_read+0x11/0x20 [ 39.747442] ? do_raw_spin_unlock+0xa7/0x2f0 [ 39.751845] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 39.756429] ? kasan_check_write+0x14/0x20 [ 39.760662] ? do_raw_read_unlock+0x3f/0x60 [ 39.764989] ? do_syscall_64+0x9a/0x820 [ 39.768967] ? do_syscall_64+0x9a/0x820 [ 39.772941] ? lockdep_hardirqs_on+0x421/0x5c0 [ 39.777525] ? trace_hardirqs_on+0xbd/0x310 [ 39.781846] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.787213] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 39.792666] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 39.797359] __x64_sys_unshare+0x31/0x40 [ 39.801421] do_syscall_64+0x1b9/0x820 [ 39.805313] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.810673] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.815602] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.820443] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.825458] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.830473] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.835492] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.840335] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.845520] RIP: 0033:0x459d87 [ 39.848712] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 3d 8a 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 1d 8a fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 39.867608] RSP: 002b:00007ffed56a7db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 [ 39.875316] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459d87 [ 39.882577] RDX: 0000000000000000 RSI: 00007ffed56a7dc0 RDI: 0000000008000000 [ 39.889841] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000018 [ 39.897108] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000412c30 [ 39.904372] R13: 0000000000412cc0 R14: 0000000000000000 R15: 0000000000000000 [ 39.911640] Modules linked in: [ 39.914918] ---[ end trace aaa68e12acf37fe0 ]--- [ 39.919684] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 39.924461] 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 [ 39.943386] RSP: 0018:ffff8801bb9df928 EFLAGS: 00010203 [ 39.948755] RAX: dffffc0000000000 RBX: ffff8801cbc17540 RCX: ffffffff8160aca1 [ 39.956039] RDX: 0eadad2f0c2dacae RSI: ffffffff833deb15 RDI: 756d6978616d6574 [ 39.963336] RBP: ffff8801bb9df948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 39.970601] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b11e80 [ 39.977886] R13: 756d6978616d656c R14: ffff8801cbc175d8 R15: ffff8801cbc175d8 [ 39.985179] FS: 0000000001c11940(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 39.993420] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.999295] CR2: 0000000000482e00 CR3: 00000001bc1b0000 CR4: 00000000001406f0 [ 40.006594] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.013881] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.021146] Kernel panic - not syncing: Fatal exception [ 40.027363] Kernel Offset: disabled [ 40.031017] Rebooting in 86400 seconds..