[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 26.695766] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.338828] random: sshd: uninitialized urandom read (32 bytes read) [ 31.742081] random: sshd: uninitialized urandom read (32 bytes read) [ 32.384984] random: sshd: uninitialized urandom read (32 bytes read) [ 36.715982] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.62' (ECDSA) to the list of known hosts. [ 42.611743] random: sshd: uninitialized urandom read (32 bytes read) [ 42.749281] kasan: CONFIG_KASAN_INLINE enabled [ 42.754103] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.761812] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.768052] CPU: 0 PID: 5559 Comm: syz-executor289 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 42.776606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.785953] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 42.790690] 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 [ 42.809703] RSP: 0018:ffff8801bb66f928 EFLAGS: 00010203 [ 42.815053] RAX: dffffc0000000000 RBX: ffff8801cdab9e40 RCX: ffffffff8160aca1 [ 42.822306] RDX: 09ca28aa600cad8f RSI: ffffffff833deb15 RDI: 4e51455300656c7d [ 42.829562] RBP: ffff8801bb66f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 42.836814] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ad7800 [ 42.844667] R13: 4e51455300656c75 R14: ffff8801cdab9ed8 R15: ffff8801cdab9ed8 [ 42.851927] FS: 00000000009b7940(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 42.860137] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.865998] CR2: 0000000000472560 CR3: 00000001bc40b000 CR4: 00000000001406f0 [ 42.873336] Call Trace: [ 42.875932] vfs_get_tree+0x1cb/0x5c0 [ 42.879738] mq_create_mount+0xe3/0x190 [ 42.883831] mq_init_ns+0x15a/0x210 [ 42.887447] copy_ipcs+0x3d2/0x580 [ 42.890969] ? ipcns_get+0xe0/0xe0 [ 42.894495] ? do_mount+0x1db0/0x1db0 [ 42.898280] ? kmem_cache_alloc+0x33a/0x730 [ 42.902595] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.908117] ? perf_event_namespaces+0x136/0x400 [ 42.912940] create_new_namespaces+0x376/0x900 [ 42.917518] ? sys_ni_syscall+0x20/0x20 [ 42.921476] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.927000] ? ns_capable_common+0x13f/0x170 [ 42.931504] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 42.936429] ksys_unshare+0x79c/0x10b0 [ 42.940342] ? walk_process_tree+0x440/0x440 [ 42.944738] ? lock_downgrade+0x900/0x900 [ 42.948872] ? kasan_check_read+0x11/0x20 [ 42.953008] ? do_raw_spin_unlock+0xa7/0x2f0 [ 42.957401] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 42.961975] ? kasan_check_write+0x14/0x20 [ 42.966254] ? do_raw_read_unlock+0x3f/0x60 [ 42.970573] ? do_syscall_64+0x9a/0x820 [ 42.974537] ? do_syscall_64+0x9a/0x820 [ 42.978551] ? lockdep_hardirqs_on+0x421/0x5c0 [ 42.983127] ? trace_hardirqs_on+0xbd/0x310 [ 42.987437] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.992794] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 42.998320] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 43.003086] __x64_sys_unshare+0x31/0x40 [ 43.007137] do_syscall_64+0x1b9/0x820 [ 43.011010] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 43.016365] ? syscall_return_slowpath+0x5e0/0x5e0 [ 43.021280] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.026110] ? trace_hardirqs_on_caller+0x310/0x310 [ 43.031117] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 43.036120] ? prepare_exit_to_usermode+0x291/0x3b0 [ 43.041126] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.045968] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.051144] RIP: 0033:0x4495b7 [ 43.054318] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ed 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 cd dc fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 43.073204] RSP: 002b:00007fffc88ef5b8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 43.080911] RAX: ffffffffffffffda RBX: 00007fffc88ef5d0 RCX: 00000000004495b7 [ 43.088252] RDX: 0000000000000000 RSI: 00007fffc88ef5c0 RDI: 0000000008000000 [ 43.095518] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000009b7940 [ 43.102780] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000407710 [ 43.110041] R13: 00000000004077a0 R14: 0000000000000000 R15: 0000000000000000 [ 43.117299] Modules linked in: [ 43.120548] ---[ end trace 842183a9399085ca ]--- [ 43.125307] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 43.130095] 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 [ 43.149064] RSP: 0018:ffff8801bb66f928 EFLAGS: 00010203 [ 43.154423] RAX: dffffc0000000000 RBX: ffff8801cdab9e40 RCX: ffffffff8160aca1 [ 43.161738] RDX: 09ca28aa600cad8f RSI: ffffffff833deb15 RDI: 4e51455300656c7d [ 43.169036] RBP: ffff8801bb66f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 43.176347] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ad7800 [ 43.183624] R13: 4e51455300656c75 R14: ffff8801cdab9ed8 R15: ffff8801cdab9ed8 [ 43.190950] FS: 00000000009b7940(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 43.199198] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.205062] CR2: 0000000000472560 CR3: 00000001bc40b000 CR4: 00000000001406f0 [ 43.212451] Kernel panic - not syncing: Fatal exception [ 43.218756] Kernel Offset: disabled [ 43.222385] Rebooting in 86400 seconds..