[....] Starting OpenBSD Secure Shell server: sshd[ 26.438554] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.003650] random: sshd: uninitialized urandom read (32 bytes read) [ 29.467099] random: sshd: uninitialized urandom read (32 bytes read) [ 30.052100] sshd (5586) used greatest stack depth: 16408 bytes left [ 30.076084] random: sshd: uninitialized urandom read (32 bytes read) [ 33.414560] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.44' (ECDSA) to the list of known hosts. [ 39.068786] random: sshd: uninitialized urandom read (32 bytes read) [ 39.197456] kasan: CONFIG_KASAN_INLINE enabled [ 39.202382] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.209834] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.216078] CPU: 1 PID: 5606 Comm: syz-executor713 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 39.224649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.234021] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 39.238785] 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 [ 39.257694] RSP: 0018:ffff8801d8067928 EFLAGS: 00010203 [ 39.263064] RAX: dffffc0000000000 RBX: ffff8801cc3095c0 RCX: ffffffff8160aca1 [ 39.270335] RDX: 0000000000018016 RSI: ffffffff833deb15 RDI: 00000000000c00b6 [ 39.277613] RBP: ffff8801d8067948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 39.284884] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b10580 [ 39.292155] R13: 00000000000c00ae R14: ffff8801cc309658 R15: ffff8801cc309658 [ 39.299437] FS: 0000000000e1d880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 39.307664] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.313543] CR2: 000000000046c800 CR3: 00000001d89c0000 CR4: 00000000001406e0 [ 39.320813] Call Trace: [ 39.323412] vfs_get_tree+0x1cb/0x5c0 [ 39.327227] mq_create_mount+0xe3/0x190 [ 39.331293] mq_init_ns+0x15a/0x210 [ 39.334919] copy_ipcs+0x3d2/0x580 [ 39.338456] ? ipcns_get+0xe0/0xe0 [ 39.342001] ? do_mount+0x1db0/0x1db0 [ 39.345802] ? kmem_cache_alloc+0x33a/0x730 [ 39.350131] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.355671] ? perf_event_namespaces+0x136/0x400 [ 39.360443] create_new_namespaces+0x376/0x900 [ 39.365033] ? sys_ni_syscall+0x20/0x20 [ 39.369011] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.374547] ? ns_capable_common+0x13f/0x170 [ 39.378957] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 39.383901] ksys_unshare+0x79c/0x10b0 [ 39.387792] ? walk_process_tree+0x440/0x440 [ 39.392203] ? lock_downgrade+0x900/0x900 [ 39.396357] ? kasan_check_read+0x11/0x20 [ 39.400507] ? do_raw_spin_unlock+0xa7/0x2f0 [ 39.404918] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 39.409506] ? kasan_check_write+0x14/0x20 [ 39.413743] ? do_raw_read_unlock+0x3f/0x60 [ 39.418065] ? do_syscall_64+0x9a/0x820 [ 39.422037] ? do_syscall_64+0x9a/0x820 [ 39.426016] ? lockdep_hardirqs_on+0x421/0x5c0 [ 39.430608] ? trace_hardirqs_on+0xbd/0x310 [ 39.434933] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.440386] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 39.445846] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 39.450522] __x64_sys_unshare+0x31/0x40 [ 39.454587] do_syscall_64+0x1b9/0x820 [ 39.458483] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.463849] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.468779] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.473629] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.478658] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.483694] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.488755] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.493634] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.498830] RIP: 0033:0x443ef7 [ 39.502033] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 9d de 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 7d de fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 39.520940] RSP: 002b:00007ffe0f79a608 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 39.528663] RAX: ffffffffffffffda RBX: 00007ffe0f79a640 RCX: 0000000000443ef7 [ 39.535944] RDX: 0000000000000000 RSI: 00007ffe0f79a610 RDI: 0000000008000000 [ 39.543225] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000000e1d880 [ 39.550531] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 39.557811] R13: 0000000000402290 R14: 0000000000000000 R15: 0000000000000000 [ 39.565091] Modules linked in: [ 39.568367] ---[ end trace 4ce9ba54cdeb061b ]--- [ 39.573170] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 39.577935] 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 [ 39.596890] RSP: 0018:ffff8801d8067928 EFLAGS: 00010203 [ 39.602352] RAX: dffffc0000000000 RBX: ffff8801cc3095c0 RCX: ffffffff8160aca1 [ 39.609667] RDX: 0000000000018016 RSI: ffffffff833deb15 RDI: 00000000000c00b6 [ 39.616951] RBP: ffff8801d8067948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 39.624273] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b10580 [ 39.631590] R13: 00000000000c00ae R14: ffff8801cc309658 R15: ffff8801cc309658 [ 39.638903] FS: 0000000000e1d880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 39.647137] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.653064] CR2: 000000000046c800 CR3: 00000001d89c0000 CR4: 00000000001406e0 [ 39.660401] Kernel panic - not syncing: Fatal exception [ 39.666584] Kernel Offset: disabled [ 39.670230] Rebooting in 86400 seconds..