[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.356664] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.655711] random: sshd: uninitialized urandom read (32 bytes read) [ 29.959107] random: sshd: uninitialized urandom read (32 bytes read) [ 30.573047] random: sshd: uninitialized urandom read (32 bytes read) [ 51.084031] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. [ 56.798156] random: sshd: uninitialized urandom read (32 bytes read) [ 56.927612] kasan: CONFIG_KASAN_INLINE enabled [ 56.932311] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 56.939796] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 56.946029] CPU: 1 PID: 5561 Comm: syz-executor931 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 56.954591] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.963956] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 56.968714] 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 [ 56.987612] RSP: 0018:ffff8801d96bf928 EFLAGS: 00010a03 [ 56.993003] RAX: dffffc0000000000 RBX: ffff8801cc934180 RCX: ffffffff8160aca1 [ 57.000266] RDX: 13f8003f000001b0 RSI: ffffffff833deb15 RDI: 9fc001f800000d84 [ 57.007529] RBP: ffff8801d96bf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 57.014807] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d79c8f80 [ 57.022083] R13: 9fc001f800000d7c R14: ffff8801cc934218 R15: ffff8801cc934218 [ 57.029353] FS: 00000000020a1880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 57.037573] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.043466] CR2: 0000000000471ab0 CR3: 00000001bba59000 CR4: 00000000001406e0 [ 57.050729] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.057991] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.065264] Call Trace: [ 57.067848] vfs_get_tree+0x1cb/0x5c0 [ 57.071653] mq_create_mount+0xe3/0x190 [ 57.075625] mq_init_ns+0x15a/0x210 [ 57.079246] copy_ipcs+0x3d2/0x580 [ 57.082784] ? ipcns_get+0xe0/0xe0 [ 57.086326] ? do_mount+0x1db0/0x1db0 [ 57.090148] ? kmem_cache_alloc+0x33a/0x730 [ 57.094472] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.100023] ? perf_event_namespaces+0x136/0x400 [ 57.104781] create_new_namespaces+0x376/0x900 [ 57.109365] ? sys_ni_syscall+0x20/0x20 [ 57.113342] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.118895] ? ns_capable_common+0x13f/0x170 [ 57.123337] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 57.128265] ksys_unshare+0x79c/0x10b0 [ 57.132155] ? walk_process_tree+0x440/0x440 [ 57.136561] ? lock_downgrade+0x900/0x900 [ 57.140723] ? kasan_check_read+0x11/0x20 [ 57.144880] ? do_raw_spin_unlock+0xa7/0x2f0 [ 57.149297] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 57.153879] ? kasan_check_write+0x14/0x20 [ 57.158117] ? do_raw_read_unlock+0x3f/0x60 [ 57.162436] ? do_syscall_64+0x9a/0x820 [ 57.166608] ? do_syscall_64+0x9a/0x820 [ 57.170591] ? lockdep_hardirqs_on+0x421/0x5c0 [ 57.175152] ? trace_hardirqs_on+0xbd/0x310 [ 57.179471] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.184857] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 57.190306] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 57.194980] __x64_sys_unshare+0x31/0x40 [ 57.199037] do_syscall_64+0x1b9/0x820 [ 57.202921] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 57.208288] ? syscall_return_slowpath+0x5e0/0x5e0 [ 57.213214] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.218061] ? trace_hardirqs_on_caller+0x310/0x310 [ 57.223075] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 57.228103] ? prepare_exit_to_usermode+0x291/0x3b0 [ 57.233136] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.237994] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.243179] RIP: 0033:0x4491b7 [ 57.246371] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd dd 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 ad dd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 57.265264] RSP: 002b:00007ffe016e5568 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 57.272979] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004491b7 [ 57.280246] RDX: 0000000000000000 RSI: 00007ffe016e5570 RDI: 0000000008000000 [ 57.287517] RBP: 00000000006da018 R08: 0000000000000000 R09: 00000000020a1880 [ 57.294792] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004073f0 [ 57.302052] R13: 0000000000407480 R14: 0000000000000000 R15: 0000000000000000 [ 57.309324] Modules linked in: [ 57.312564] ---[ end trace 7df2296f8d3bb9c0 ]--- [ 57.317353] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 57.322107] 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 [ 57.341039] RSP: 0018:ffff8801d96bf928 EFLAGS: 00010a03 [ 57.346419] RAX: dffffc0000000000 RBX: ffff8801cc934180 RCX: ffffffff8160aca1 [ 57.353683] RDX: 13f8003f000001b0 RSI: ffffffff833deb15 RDI: 9fc001f800000d84 [ 57.360972] RBP: ffff8801d96bf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 57.368261] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d79c8f80 [ 57.375527] R13: 9fc001f800000d7c R14: ffff8801cc934218 R15: ffff8801cc934218 [ 57.382825] FS: 00000000020a1880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 57.391073] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.396992] CR2: 0000000000471ab0 CR3: 00000001bba59000 CR4: 00000000001406e0 [ 57.404261] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.411541] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.418823] Kernel panic - not syncing: Fatal exception [ 57.425073] Kernel Offset: disabled [ 57.428701] Rebooting in 86400 seconds..