[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.338942] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 25.535050] random: sshd: uninitialized urandom read (32 bytes read) [ 25.980425] random: sshd: uninitialized urandom read (32 bytes read) [ 26.615322] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.838663] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.206' (ECDSA) to the list of known hosts. [ 32.438823] random: sshd: uninitialized urandom read (32 bytes read) [ 32.595844] kasan: CONFIG_KASAN_INLINE enabled [ 32.600573] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.608030] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.614266] CPU: 0 PID: 5570 Comm: syz-executor908 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 32.622830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.632387] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 32.637143] 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 [ 32.656065] RSP: 0018:ffff8801baea7928 EFLAGS: 00010206 [ 32.661426] RAX: dffffc0000000000 RBX: ffff8801ccf9d500 RCX: ffffffff8160aca1 [ 32.668698] RDX: 01e284889125ff11 RSI: ffffffff833deb15 RDI: 0f142444892ff88b [ 32.676000] RBP: ffff8801baea7948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 32.683273] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b19080 [ 32.690557] R13: 0f142444892ff883 R14: ffff8801ccf9d598 R15: ffff8801ccf9d598 [ 32.697832] FS: 0000000002059880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 32.706056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.711934] CR2: 0000000000473440 CR3: 00000001d8fd6000 CR4: 00000000001406f0 [ 32.719201] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.726477] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.733920] Call Trace: [ 32.736530] vfs_get_tree+0x1cb/0x5c0 [ 32.740352] mq_create_mount+0xe3/0x190 [ 32.744346] mq_init_ns+0x15a/0x210 [ 32.747977] copy_ipcs+0x3d2/0x580 [ 32.751514] ? ipcns_get+0xe0/0xe0 [ 32.755057] ? do_mount+0x1db0/0x1db0 [ 32.758878] ? kmem_cache_alloc+0x33a/0x730 [ 32.763267] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.768803] ? perf_event_namespaces+0x136/0x400 [ 32.773558] create_new_namespaces+0x376/0x900 [ 32.778141] ? sys_ni_syscall+0x20/0x20 [ 32.782121] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.787690] ? ns_capable_common+0x13f/0x170 [ 32.792100] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 32.797034] ksys_unshare+0x79c/0x10b0 [ 32.800933] ? walk_process_tree+0x440/0x440 [ 32.805373] ? lock_downgrade+0x900/0x900 [ 32.809521] ? kasan_check_read+0x11/0x20 [ 32.813687] ? do_raw_spin_unlock+0xa7/0x2f0 [ 32.818110] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 32.822698] ? kasan_check_write+0x14/0x20 [ 32.826945] ? do_raw_read_unlock+0x3f/0x60 [ 32.831264] ? do_syscall_64+0x9a/0x820 [ 32.835270] ? do_syscall_64+0x9a/0x820 [ 32.839243] ? lockdep_hardirqs_on+0x421/0x5c0 [ 32.843829] ? trace_hardirqs_on+0xbd/0x310 [ 32.848152] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.853540] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 32.858989] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 32.863663] __x64_sys_unshare+0x31/0x40 [ 32.867729] do_syscall_64+0x1b9/0x820 [ 32.871618] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 32.877001] ? syscall_return_slowpath+0x5e0/0x5e0 [ 32.881947] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.886788] ? trace_hardirqs_on_caller+0x310/0x310 [ 32.891812] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 32.896844] ? prepare_exit_to_usermode+0x291/0x3b0 [ 32.901863] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.906716] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.911908] RIP: 0033:0x44a4d7 [ 32.915107] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 9d d6 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 d6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 32.934006] RSP: 002b:00007ffc4591fda8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 32.941711] RAX: ffffffffffffffda RBX: 00007ffc4591ff10 RCX: 000000000044a4d7 [ 32.948977] RDX: 0000000000000000 RSI: 00007ffc4591fdb0 RDI: 0000000008000000 [ 32.956256] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000000000018 [ 32.963544] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 32.970813] R13: 0000000000408070 R14: 0000000000000000 R15: 0000000000000000 [ 32.978084] Modules linked in: [ 32.981489] ---[ end trace b570e4720e22baab ]--- [ 32.986303] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 32.991059] 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 [ 33.009982] RSP: 0018:ffff8801baea7928 EFLAGS: 00010206 [ 33.015369] RAX: dffffc0000000000 RBX: ffff8801ccf9d500 RCX: ffffffff8160aca1 [ 33.022657] RDX: 01e284889125ff11 RSI: ffffffff833deb15 RDI: 0f142444892ff88b [ 33.029954] RBP: ffff8801baea7948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 33.037252] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7b19080 [ 33.044549] R13: 0f142444892ff883 R14: ffff8801ccf9d598 R15: ffff8801ccf9d598 [ 33.051819] FS: 0000000002059880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 33.060066] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.065978] CR2: 0000000000473440 CR3: 00000001d8fd6000 CR4: 00000000001406f0 [ 33.073246] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.080533] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.087821] Kernel panic - not syncing: Fatal exception [ 33.094061] Kernel Offset: disabled [ 33.097686] Rebooting in 86400 seconds..