[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.775155] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.752427] random: sshd: uninitialized urandom read (32 bytes read) [ 28.104253] random: sshd: uninitialized urandom read (32 bytes read) [ 28.693102] random: sshd: uninitialized urandom read (32 bytes read) [ 28.904709] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. [ 34.455547] random: sshd: uninitialized urandom read (32 bytes read) [ 34.583287] kasan: CONFIG_KASAN_INLINE enabled [ 34.588325] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.595924] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.602155] CPU: 0 PID: 5559 Comm: syz-executor789 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 34.610725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.620114] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 34.624861] 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 [ 34.643763] RSP: 0018:ffff8801c3527928 EFLAGS: 00010a02 [ 34.649113] RAX: dffffc0000000000 RBX: ffff8801cd6e6bc0 RCX: ffffffff8160aca1 [ 34.656366] RDX: 1bffff8000000001 RSI: ffffffff833deb15 RDI: dffffc0000000008 [ 34.663631] RBP: ffff8801c3527948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 34.670979] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a993c0 [ 34.678231] R13: dffffc0000000000 R14: ffff8801cd6e6c58 R15: ffff8801cd6e6c58 [ 34.685484] FS: 0000000000b40940(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 34.693697] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.699560] CR2: 0000000000473330 CR3: 00000001d8973000 CR4: 00000000001406f0 [ 34.706817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.714074] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.721328] Call Trace: [ 34.723904] vfs_get_tree+0x1cb/0x5c0 [ 34.727718] mq_create_mount+0xe3/0x190 [ 34.731675] mq_init_ns+0x15a/0x210 [ 34.735281] copy_ipcs+0x3d2/0x580 [ 34.738802] ? ipcns_get+0xe0/0xe0 [ 34.742328] ? do_mount+0x1db0/0x1db0 [ 34.746109] ? kmem_cache_alloc+0x33a/0x730 [ 34.750418] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.755946] ? perf_event_namespaces+0x136/0x400 [ 34.760688] create_new_namespaces+0x376/0x900 [ 34.765255] ? sys_ni_syscall+0x20/0x20 [ 34.769212] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.774737] ? ns_capable_common+0x13f/0x170 [ 34.779128] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 34.784042] ksys_unshare+0x79c/0x10b0 [ 34.787918] ? walk_process_tree+0x440/0x440 [ 34.792315] ? lock_downgrade+0x900/0x900 [ 34.796624] ? kasan_check_read+0x11/0x20 [ 34.800772] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.805169] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 34.809740] ? kasan_check_write+0x14/0x20 [ 34.813975] ? do_raw_read_unlock+0x3f/0x60 [ 34.818280] ? do_syscall_64+0x9a/0x820 [ 34.822236] ? do_syscall_64+0x9a/0x820 [ 34.826197] ? lockdep_hardirqs_on+0x421/0x5c0 [ 34.830765] ? trace_hardirqs_on+0xbd/0x310 [ 34.835071] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.840418] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 34.845851] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 34.850527] __x64_sys_unshare+0x31/0x40 [ 34.854578] do_syscall_64+0x1b9/0x820 [ 34.858453] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.863804] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.868714] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.873543] ? trace_hardirqs_on_caller+0x310/0x310 [ 34.878556] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 34.883560] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.888561] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.893401] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.898587] RIP: 0033:0x449e17 [ 34.901784] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 3d 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 1d de fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 34.920676] RSP: 002b:00007fff4659fc38 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 34.928374] RAX: ffffffffffffffda RBX: 00007fff4659fcf0 RCX: 0000000000449e17 [ 34.935628] RDX: 0000000000000000 RSI: 00007fff4659fc40 RDI: 0000000008000000 [ 34.942895] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000b40940 [ 34.950149] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004080c0 [ 34.957403] R13: 0000000000408150 R14: 0000000000000000 R15: 0000000000000000 [ 34.964660] Modules linked in: [ 34.967930] ---[ end trace 1f678eaacd59c16e ]--- [ 34.972718] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 34.977458] 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 [ 34.996416] RSP: 0018:ffff8801c3527928 EFLAGS: 00010a02 [ 35.001819] RAX: dffffc0000000000 RBX: ffff8801cd6e6bc0 RCX: ffffffff8160aca1 [ 35.009088] RDX: 1bffff8000000001 RSI: ffffffff833deb15 RDI: dffffc0000000008 [ 35.016408] RBP: ffff8801c3527948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 35.023697] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7a993c0 [ 35.030995] R13: dffffc0000000000 R14: ffff8801cd6e6c58 R15: ffff8801cd6e6c58 [ 35.038266] FS: 0000000000b40940(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 35.046547] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.052454] CR2: 0000000000473330 CR3: 00000001d8973000 CR4: 00000000001406f0 [ 35.059714] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.067007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.074314] Kernel panic - not syncing: Fatal exception [ 35.080595] Kernel Offset: disabled [ 35.084229] Rebooting in 86400 seconds..