[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 26.002720] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.215361] random: sshd: uninitialized urandom read (32 bytes read) [ 31.632002] random: sshd: uninitialized urandom read (32 bytes read) [ 32.184800] random: sshd: uninitialized urandom read (32 bytes read) [ 32.394532] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. [ 38.103192] random: sshd: uninitialized urandom read (32 bytes read) [ 38.226027] kasan: CONFIG_KASAN_INLINE enabled [ 38.230913] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.238300] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.244539] CPU: 1 PID: 5580 Comm: syz-executor541 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 38.253114] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.262481] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 38.267240] 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 [ 38.286170] RSP: 0018:ffff8801c78cf928 EFLAGS: 00010a03 [ 38.291719] RAX: dffffc0000000000 RBX: ffff8801cd3e27c0 RCX: ffffffff8160aca1 [ 38.298996] RDX: 12240045400001b0 RSI: ffffffff833deb15 RDI: 9120022a00000d84 [ 38.306273] RBP: ffff8801c78cf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 38.313552] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a8bb80 [ 38.320821] R13: 9120022a00000d7c R14: ffff8801cd3e2858 R15: ffff8801cd3e2858 [ 38.328100] FS: 0000000000f80940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 38.336331] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.342252] CR2: 00000000004709b0 CR3: 00000001d955a000 CR4: 00000000001406e0 [ 38.349616] Call Trace: [ 38.352212] vfs_get_tree+0x1cb/0x5c0 [ 38.356022] mq_create_mount+0xe3/0x190 [ 38.360013] mq_init_ns+0x15a/0x210 [ 38.363642] copy_ipcs+0x3d2/0x580 [ 38.367275] ? ipcns_get+0xe0/0xe0 [ 38.370825] ? do_mount+0x1db0/0x1db0 [ 38.374643] ? kmem_cache_alloc+0x33a/0x730 [ 38.378978] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.384529] ? perf_event_namespaces+0x136/0x400 [ 38.389305] create_new_namespaces+0x376/0x900 [ 38.393896] ? sys_ni_syscall+0x20/0x20 [ 38.397885] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.403540] ? ns_capable_common+0x13f/0x170 [ 38.407962] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 38.412923] ksys_unshare+0x79c/0x10b0 [ 38.416906] ? walk_process_tree+0x440/0x440 [ 38.421324] ? lock_downgrade+0x900/0x900 [ 38.425491] ? kasan_check_read+0x11/0x20 [ 38.429640] ? do_raw_spin_unlock+0xa7/0x2f0 [ 38.434064] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.438657] ? kasan_check_write+0x14/0x20 [ 38.443164] ? do_raw_read_unlock+0x3f/0x60 [ 38.447498] ? do_syscall_64+0x9a/0x820 [ 38.451478] ? do_syscall_64+0x9a/0x820 [ 38.455470] ? lockdep_hardirqs_on+0x421/0x5c0 [ 38.460235] ? trace_hardirqs_on+0xbd/0x310 [ 38.464572] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.469955] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 38.475419] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 38.480099] __x64_sys_unshare+0x31/0x40 [ 38.484174] do_syscall_64+0x1b9/0x820 [ 38.488077] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.493453] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.498403] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.503364] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.508400] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.513435] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.518470] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.523327] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.528520] RIP: 0033:0x4487d7 [ 38.531719] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 9c 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 bd 9c fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 38.550627] RSP: 002b:00007ffde9f56488 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 38.558431] RAX: ffffffffffffffda RBX: 00007ffde9f564a0 RCX: 00000000004487d7 [ 38.565737] RDX: 0000000000000000 RSI: 00007ffde9f56490 RDI: 0000000008000000 [ 38.573006] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000f80940 [ 38.580274] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000402920 [ 38.587547] R13: 00000000004029b0 R14: 0000000000000000 R15: 0000000000000000 [ 38.594837] Modules linked in: [ 38.598118] ---[ end trace 2eddadf56e63aeae ]--- [ 38.602918] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 38.607679] 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 [ 38.626622] RSP: 0018:ffff8801c78cf928 EFLAGS: 00010a03 [ 38.632030] RAX: dffffc0000000000 RBX: ffff8801cd3e27c0 RCX: ffffffff8160aca1 [ 38.639303] RDX: 12240045400001b0 RSI: ffffffff833deb15 RDI: 9120022a00000d84 [ 38.646610] RBP: ffff8801c78cf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 38.653910] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a8bb80 [ 38.661210] R13: 9120022a00000d7c R14: ffff8801cd3e2858 R15: ffff8801cd3e2858 [ 38.668502] FS: 0000000000f80940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 38.676756] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.682668] CR2: 00000000004709b0 CR3: 00000001d955a000 CR4: 00000000001406e0 [ 38.689944] Kernel panic - not syncing: Fatal exception [ 38.696182] Kernel Offset: disabled [ 38.699806] Rebooting in 86400 seconds..