[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.383119] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.692471] random: sshd: uninitialized urandom read (32 bytes read) [ 27.117093] random: sshd: uninitialized urandom read (32 bytes read) [ 27.763107] random: sshd: uninitialized urandom read (32 bytes read) [ 27.991847] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts. [ 33.695570] random: sshd: uninitialized urandom read (32 bytes read) [ 33.840760] kasan: CONFIG_KASAN_INLINE enabled [ 33.845573] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.852944] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.859173] CPU: 1 PID: 5559 Comm: syz-executor976 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 33.867745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.877108] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 33.881860] 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 [ 33.900766] RSP: 0018:ffff8801bbaf7928 EFLAGS: 00010206 [ 33.906132] RAX: dffffc0000000000 RBX: ffff8801cc909b40 RCX: ffffffff8160aca1 [ 33.913396] RDX: 0000000000018006 RSI: ffffffff833deb15 RDI: 00000000000c0032 [ 33.920660] RBP: ffff8801bbaf7948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 33.927922] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ac00c0 [ 33.935204] R13: 00000000000c002a R14: ffff8801cc909bd8 R15: ffff8801cc909bd8 [ 33.942501] FS: 0000000001816880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 33.950727] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.956605] CR2: 00000000004776a0 CR3: 00000001d8e4b000 CR4: 00000000001406e0 [ 33.963871] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.971141] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.978406] Call Trace: [ 33.980997] vfs_get_tree+0x1cb/0x5c0 [ 33.984801] mq_create_mount+0xe3/0x190 [ 33.988774] mq_init_ns+0x15a/0x210 [ 33.992400] copy_ipcs+0x3d2/0x580 [ 33.995938] ? ipcns_get+0xe0/0xe0 [ 33.999482] ? do_mount+0x1db0/0x1db0 [ 34.003282] ? kmem_cache_alloc+0x33a/0x730 [ 34.007603] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.013138] ? perf_event_namespaces+0x136/0x400 [ 34.017894] create_new_namespaces+0x376/0x900 [ 34.022481] ? sys_ni_syscall+0x20/0x20 [ 34.026454] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.031994] ? ns_capable_common+0x13f/0x170 [ 34.036408] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 34.041339] ksys_unshare+0x79c/0x10b0 [ 34.045243] ? walk_process_tree+0x440/0x440 [ 34.049683] ? lock_downgrade+0x900/0x900 [ 34.053831] ? kasan_check_read+0x11/0x20 [ 34.057974] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.062378] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 34.066964] ? kasan_check_write+0x14/0x20 [ 34.071243] ? do_raw_read_unlock+0x3f/0x60 [ 34.075573] ? do_syscall_64+0x9a/0x820 [ 34.079557] ? do_syscall_64+0x9a/0x820 [ 34.083530] ? lockdep_hardirqs_on+0x421/0x5c0 [ 34.088111] ? trace_hardirqs_on+0xbd/0x310 [ 34.092434] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.097814] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 34.103263] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 34.107936] __x64_sys_unshare+0x31/0x40 [ 34.111998] do_syscall_64+0x1b9/0x820 [ 34.115886] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.121250] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.126179] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.131057] ? trace_hardirqs_on_caller+0x310/0x310 [ 34.136071] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 34.141085] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.146101] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.150948] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.156134] RIP: 0033:0x44e717 [ 34.159334] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd 9a 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 9d 9a fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 34.178232] RSP: 002b:00007ffdc5a0a4e8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 34.185957] RAX: ffffffffffffffda RBX: 00007ffdc5a0a660 RCX: 000000000044e717 [ 34.193222] RDX: 0000000000000000 RSI: 00007ffdc5a0a500 RDI: 0000000008000000 [ 34.200503] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000000000018 [ 34.207767] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 34.215043] R13: 00000000004086d0 R14: 0000000000000000 R15: 0000000000000000 [ 34.222314] Modules linked in: [ 34.225618] ---[ end trace 45e54bf7dc140f15 ]--- [ 34.230387] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 34.235145] 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 [ 34.254068] RSP: 0018:ffff8801bbaf7928 EFLAGS: 00010206 [ 34.259457] RAX: dffffc0000000000 RBX: ffff8801cc909b40 RCX: ffffffff8160aca1 [ 34.266776] RDX: 0000000000018006 RSI: ffffffff833deb15 RDI: 00000000000c0032 [ 34.274049] RBP: ffff8801bbaf7948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 34.281339] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ac00c0 [ 34.288631] R13: 00000000000c002a R14: ffff8801cc909bd8 R15: ffff8801cc909bd8 [ 34.295946] FS: 0000000001816880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 34.304178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.310095] CR2: 00000000004776a0 CR3: 00000001d8e4b000 CR4: 00000000001406e0 [ 34.317400] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.324668] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.331960] Kernel panic - not syncing: Fatal exception [ 34.338293] Kernel Offset: disabled [ 34.341915] Rebooting in 86400 seconds..