[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 27.016664] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.208995] random: sshd: uninitialized urandom read (32 bytes read) [ 30.617047] random: sshd: uninitialized urandom read (32 bytes read) [ 31.215638] random: sshd: uninitialized urandom read (32 bytes read) [ 31.430827] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.209' (ECDSA) to the list of known hosts. [ 37.188913] random: sshd: uninitialized urandom read (32 bytes read) [ 37.319192] kasan: CONFIG_KASAN_INLINE enabled [ 37.323844] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.331286] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.337525] CPU: 1 PID: 5572 Comm: syz-executor092 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 37.346105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.355477] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.360235] 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 [ 37.379123] RSP: 0018:ffff8801bada7928 EFLAGS: 00010202 [ 37.384472] RAX: dffffc0000000000 RBX: ffff8801cccc2080 RCX: ffffffff8160aca1 [ 37.391722] RDX: 000000000836b157 RSI: ffffffff833deb15 RDI: 0000000041b58abb [ 37.398972] RBP: ffff8801bada7948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.406661] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7aab7c0 [ 37.413921] R13: 0000000041b58ab3 R14: ffff8801cccc2118 R15: ffff8801cccc2118 [ 37.421185] FS: 000000000146d940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 37.429393] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.435279] CR2: 000000000046cdf0 CR3: 00000001d8cb7000 CR4: 00000000001406e0 [ 37.442554] Call Trace: [ 37.445133] vfs_get_tree+0x1cb/0x5c0 [ 37.448920] mq_create_mount+0xe3/0x190 [ 37.452878] mq_init_ns+0x15a/0x210 [ 37.456492] copy_ipcs+0x3d2/0x580 [ 37.460014] ? ipcns_get+0xe0/0xe0 [ 37.463539] ? do_mount+0x1db0/0x1db0 [ 37.467324] ? kmem_cache_alloc+0x33a/0x730 [ 37.471649] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.477171] ? perf_event_namespaces+0x136/0x400 [ 37.481910] create_new_namespaces+0x376/0x900 [ 37.486477] ? sys_ni_syscall+0x20/0x20 [ 37.490436] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.495957] ? ns_capable_common+0x13f/0x170 [ 37.500352] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 37.505285] ksys_unshare+0x79c/0x10b0 [ 37.509161] ? walk_process_tree+0x440/0x440 [ 37.513575] ? lock_downgrade+0x900/0x900 [ 37.517709] ? kasan_check_read+0x11/0x20 [ 37.521840] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.526232] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.530797] ? kasan_check_write+0x14/0x20 [ 37.535030] ? do_raw_read_unlock+0x3f/0x60 [ 37.539339] ? do_syscall_64+0x9a/0x820 [ 37.543299] ? do_syscall_64+0x9a/0x820 [ 37.547260] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.551849] ? trace_hardirqs_on+0xbd/0x310 [ 37.556157] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.561504] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 37.566940] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 37.571593] __x64_sys_unshare+0x31/0x40 [ 37.575637] do_syscall_64+0x1b9/0x820 [ 37.579508] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.584856] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.589768] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.594597] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.599597] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.604600] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.609606] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.614434] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.619606] RIP: 0033:0x444287 [ 37.622786] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ed 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 cd de fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.641690] RSP: 002b:00007ffc468e42c8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 37.649380] RAX: ffffffffffffffda RBX: 00007ffc468e4380 RCX: 0000000000444287 [ 37.656634] RDX: 0000000000000000 RSI: 00007ffc468e42d0 RDI: 0000000008000000 [ 37.663907] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000146d940 [ 37.671270] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004025e0 [ 37.678714] R13: 0000000000402670 R14: 0000000000000000 R15: 0000000000000000 [ 37.685971] Modules linked in: [ 37.689348] ---[ end trace 65d39bd7b7da636d ]--- [ 37.694138] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.698880] 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 [ 37.717804] RSP: 0018:ffff8801bada7928 EFLAGS: 00010202 [ 37.723192] RAX: dffffc0000000000 RBX: ffff8801cccc2080 RCX: ffffffff8160aca1 [ 37.730477] RDX: 000000000836b157 RSI: ffffffff833deb15 RDI: 0000000041b58abb [ 37.737761] RBP: ffff8801bada7948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.745050] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7aab7c0 [ 37.752333] R13: 0000000041b58ab3 R14: ffff8801cccc2118 R15: ffff8801cccc2118 [ 37.759622] FS: 000000000146d940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 37.767908] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.773777] CR2: 000000000046cdf0 CR3: 00000001d8cb7000 CR4: 00000000001406e0 [ 37.781073] Kernel panic - not syncing: Fatal exception [ 37.787257] Kernel Offset: disabled [ 37.790882] Rebooting in 86400 seconds..