[....] Starting OpenBSD Secure Shell server: sshd[ 26.548651] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.132678] random: sshd: uninitialized urandom read (32 bytes read) [ 30.665380] random: sshd: uninitialized urandom read (32 bytes read) [ 31.316056] random: sshd: uninitialized urandom read (32 bytes read) [ 31.547510] random: sshd: uninitialized urandom read (32 bytes read) [ 31.724097] sshd (5569) used greatest stack depth: 16600 bytes left Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts. [ 37.185132] random: sshd: uninitialized urandom read (32 bytes read) [ 37.315211] IPVS: ftp: loaded support on port[0] = 21 [ 37.316194] IPVS: ftp: loaded support on port[0] = 21 [ 37.323556] kasan: CONFIG_KASAN_INLINE enabled [ 37.330728] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.338103] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.344335] CPU: 1 PID: 5587 Comm: syz-executor119 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 37.352905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.362270] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.367028] 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 [ 37.385929] RSP: 0018:ffff8801bf507928 EFLAGS: 00010203 [ 37.391294] RAX: dffffc0000000000 RBX: ffff8801cd170280 RCX: ffffffff8160aca1 [ 37.398560] RDX: 0eac8deda7a9a8ab RSI: ffffffff833deb15 RDI: 75646f6d3d4d455c [ 37.405830] RBP: ffff8801bf507948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.413100] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ae8880 [ 37.420369] R13: 75646f6d3d4d4554 R14: ffff8801cd170318 R15: ffff8801cd170318 [ 37.427643] FS: 0000000001600880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 37.435866] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.441743] CR2: 000000000046e0e0 CR3: 00000001d9550000 CR4: 00000000001406e0 [ 37.449012] Call Trace: [ 37.451608] vfs_get_tree+0x1cb/0x5c0 [ 37.455418] mq_create_mount+0xe3/0x190 [ 37.459401] mq_init_ns+0x15a/0x210 [ 37.463229] copy_ipcs+0x3d2/0x580 [ 37.466771] ? ipcns_get+0xe0/0xe0 [ 37.470319] ? do_mount+0x1db0/0x1db0 [ 37.474121] ? kmem_cache_alloc+0x33a/0x730 [ 37.478464] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.484001] ? perf_event_namespaces+0x136/0x400 [ 37.488779] create_new_namespaces+0x376/0x900 [ 37.493371] ? sys_ni_syscall+0x20/0x20 [ 37.497349] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.502908] ? ns_capable_common+0x13f/0x170 [ 37.507337] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 37.512275] ksys_unshare+0x79c/0x10b0 [ 37.516166] ? walk_process_tree+0x440/0x440 [ 37.520582] ? lock_downgrade+0x900/0x900 [ 37.524738] ? kasan_check_read+0x11/0x20 [ 37.528884] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.533298] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.537907] ? kasan_check_write+0x14/0x20 [ 37.542142] ? do_raw_read_unlock+0x3f/0x60 [ 37.546466] ? do_syscall_64+0x9a/0x820 [ 37.550440] ? do_syscall_64+0x9a/0x820 [ 37.554419] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.559005] ? trace_hardirqs_on+0xbd/0x310 [ 37.563329] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.568706] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 37.574161] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 37.578843] __x64_sys_unshare+0x31/0x40 [ 37.582935] do_syscall_64+0x1b9/0x820 [ 37.586843] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.592216] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.597147] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.601997] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.607015] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.612052] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.617071] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.621923] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.627116] RIP: 0033:0x445737 [ 37.630313] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d 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 6d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.649219] RSP: 002b:00007fff5a6c18e8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 37.656932] RAX: ffffffffffffffda RBX: 00007fff5a6c1950 RCX: 0000000000445737 [ 37.664203] RDX: 0000000000000000 RSI: 00007fff5a6c18f0 RDI: 0000000008000000 [ 37.671472] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000001600880 [ 37.678740] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 37.686005] R13: 00000000004033c0 R14: 0000000000000000 R15: 0000000000000000 [ 37.693279] Modules linked in: [ 37.696533] ---[ end trace e568639574808b99 ]--- [ 37.701328] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.706089] 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 [ 37.725020] RSP: 0018:ffff8801bf507928 EFLAGS: 00010203 [ 37.730412] RAX: dffffc0000000000 RBX: ffff8801cd170280 RCX: ffffffff8160aca1 [ 37.737680] RDX: 0eac8deda7a9a8ab RSI: ffffffff833deb15 RDI: 75646f6d3d4d455c [ 37.744973] RBP: ffff8801bf507948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.752270] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ae8880 [ 37.759590] R13: 75646f6d3d4d4554 R14: ffff8801cd170318 R15: ffff8801cd170318 [ 37.766865] FS: 0000000001600880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 37.775117] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.781023] CR2: 000000000046e0e0 CR3: 00000001d9550000 CR4: 00000000001406e0 [ 37.788295] Kernel panic - not syncing: Fatal exception [ 37.794490] Kernel Offset: disabled [ 37.798115] Rebooting in 86400 seconds..