[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.819960] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.090503] random: sshd: uninitialized urandom read (32 bytes read) [ 32.429454] random: sshd: uninitialized urandom read (32 bytes read) [ 33.017510] random: sshd: uninitialized urandom read (32 bytes read) [ 33.239343] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. [ 38.817169] random: sshd: uninitialized urandom read (32 bytes read) [ 38.962252] kasan: CONFIG_KASAN_INLINE enabled [ 38.966957] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.974442] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.980682] CPU: 0 PID: 5574 Comm: syz-executor735 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 38.989252] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.998625] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 39.003385] 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 [ 39.023064] RSP: 0018:ffff8801d8907928 EFLAGS: 00010203 [ 39.028425] RAX: dffffc0000000000 RBX: ffff8801cd213e40 RCX: ffffffff8160aca1 [ 39.035693] RDX: 000000000000071f RSI: ffffffff833deb15 RDI: 00000000000038fd [ 39.042958] RBP: ffff8801d8907948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 39.050220] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a40e80 [ 39.057823] R13: 00000000000038f5 R14: ffff8801cd213ed8 R15: ffff8801cd213ed8 [ 39.065105] FS: 00000000014c0880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 39.073327] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.079203] CR2: 000000000046daf0 CR3: 00000001bb7e3000 CR4: 00000000001406f0 [ 39.086471] Call Trace: [ 39.089070] vfs_get_tree+0x1cb/0x5c0 [ 39.093050] mq_create_mount+0xe3/0x190 [ 39.097029] mq_init_ns+0x15a/0x210 [ 39.100652] copy_ipcs+0x3d2/0x580 [ 39.104191] ? ipcns_get+0xe0/0xe0 [ 39.107730] ? do_mount+0x1db0/0x1db0 [ 39.111536] ? kmem_cache_alloc+0x33a/0x730 [ 39.115860] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.121409] ? perf_event_namespaces+0x136/0x400 [ 39.126165] create_new_namespaces+0x376/0x900 [ 39.130752] ? sys_ni_syscall+0x20/0x20 [ 39.134730] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.140267] ? ns_capable_common+0x13f/0x170 [ 39.144679] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 39.149613] ksys_unshare+0x79c/0x10b0 [ 39.153513] ? walk_process_tree+0x440/0x440 [ 39.157931] ? lock_downgrade+0x900/0x900 [ 39.162082] ? kasan_check_read+0x11/0x20 [ 39.166232] ? do_raw_spin_unlock+0xa7/0x2f0 [ 39.170638] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 39.175223] ? kasan_check_write+0x14/0x20 [ 39.179454] ? do_raw_read_unlock+0x3f/0x60 [ 39.183774] ? do_syscall_64+0x9a/0x820 [ 39.187756] ? do_syscall_64+0x9a/0x820 [ 39.191733] ? lockdep_hardirqs_on+0x421/0x5c0 [ 39.196319] ? trace_hardirqs_on+0xbd/0x310 [ 39.200649] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.206013] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 39.211464] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 39.216148] __x64_sys_unshare+0x31/0x40 [ 39.220211] do_syscall_64+0x1b9/0x820 [ 39.224101] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.229463] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.234398] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.239248] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.244266] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.249286] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.254312] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.259163] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.264349] RIP: 0033:0x445227 [ 39.267547] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 2d d7 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 0d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 39.286454] RSP: 002b:00007ffdfd87d8b8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 39.294175] RAX: ffffffffffffffda RBX: 00007ffdfd87d940 RCX: 0000000000445227 [ 39.301445] RDX: 0000000000000000 RSI: 00007ffdfd87d8c0 RDI: 0000000008000000 [ 39.308709] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000000000018 [ 39.315975] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 39.323240] R13: 0000000000402e50 R14: 0000000000000000 R15: 0000000000000000 [ 39.330522] Modules linked in: [ 39.333815] ---[ end trace b4e0ff95899ca2f0 ]--- [ 39.338584] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 39.343365] 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 [ 39.362302] RSP: 0018:ffff8801d8907928 EFLAGS: 00010203 [ 39.367669] RAX: dffffc0000000000 RBX: ffff8801cd213e40 RCX: ffffffff8160aca1 [ 39.374963] RDX: 000000000000071f RSI: ffffffff833deb15 RDI: 00000000000038fd [ 39.382252] RBP: ffff8801d8907948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 39.389524] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a40e80 [ 39.396812] R13: 00000000000038f5 R14: ffff8801cd213ed8 R15: ffff8801cd213ed8 [ 39.404123] FS: 00000000014c0880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 39.412377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.418258] CR2: 000000000046daf0 CR3: 00000001bb7e3000 CR4: 00000000001406f0 [ 39.425558] Kernel panic - not syncing: Fatal exception [ 39.431904] Kernel Offset: disabled [ 39.435528] Rebooting in 86400 seconds..