[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 26.353946] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.419172] random: sshd: uninitialized urandom read (32 bytes read) [ 29.851164] random: sshd: uninitialized urandom read (32 bytes read) [ 30.452317] random: sshd: uninitialized urandom read (32 bytes read) [ 30.672521] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. [ 36.236541] random: sshd: uninitialized urandom read (32 bytes read) [ 36.399567] kasan: CONFIG_KASAN_INLINE enabled [ 36.404274] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.411696] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.417933] CPU: 0 PID: 5605 Comm: syz-executor527 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 36.426525] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.435908] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 36.440660] 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 [ 36.459558] RSP: 0018:ffff8801be7cf928 EFLAGS: 00010203 [ 36.464915] RAX: dffffc0000000000 RBX: ffff8801cb8fe700 RCX: ffffffff8160aca1 [ 36.472183] RDX: 062627aa49e9c92a RSI: ffffffff833deb15 RDI: 31313d524f4e4955 [ 36.479446] RBP: ffff8801be7cf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 36.486709] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7acab00 [ 36.493972] R13: 31313d524f4e494d R14: ffff8801cb8fe798 R15: ffff8801cb8fe798 [ 36.501261] FS: 0000000000cb7880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 36.509496] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.515373] CR2: 000000000046da60 CR3: 00000001bc17a000 CR4: 00000000001406f0 [ 36.522636] Call Trace: [ 36.525229] vfs_get_tree+0x1cb/0x5c0 [ 36.529032] mq_create_mount+0xe3/0x190 [ 36.533007] mq_init_ns+0x15a/0x210 [ 36.536628] copy_ipcs+0x3d2/0x580 [ 36.540169] ? ipcns_get+0xe0/0xe0 [ 36.543714] ? do_mount+0x1db0/0x1db0 [ 36.547508] ? kmem_cache_alloc+0x33a/0x730 [ 36.551833] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.557375] ? perf_event_namespaces+0x136/0x400 [ 36.562136] create_new_namespaces+0x376/0x900 [ 36.566724] ? sys_ni_syscall+0x20/0x20 [ 36.570704] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.576237] ? ns_capable_common+0x13f/0x170 [ 36.580648] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 36.585596] ksys_unshare+0x79c/0x10b0 [ 36.589498] ? walk_process_tree+0x440/0x440 [ 36.593908] ? lock_downgrade+0x900/0x900 [ 36.598059] ? kasan_check_read+0x11/0x20 [ 36.602202] ? do_raw_spin_unlock+0xa7/0x2f0 [ 36.606606] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.611187] ? kasan_check_write+0x14/0x20 [ 36.615437] ? do_raw_read_unlock+0x3f/0x60 [ 36.619789] ? do_syscall_64+0x9a/0x820 [ 36.623759] ? do_syscall_64+0x9a/0x820 [ 36.627733] ? lockdep_hardirqs_on+0x421/0x5c0 [ 36.632317] ? trace_hardirqs_on+0xbd/0x310 [ 36.636641] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.642017] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 36.647468] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 36.652143] __x64_sys_unshare+0x31/0x40 [ 36.656202] do_syscall_64+0x1b9/0x820 [ 36.660088] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.665452] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.670378] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.675219] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.680235] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.685249] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.690267] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.695115] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.700301] RIP: 0033:0x4450f7 [ 36.703491] 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 [ 36.722403] RSP: 002b:00007ffeb2f80d88 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 36.730107] RAX: ffffffffffffffda RBX: 00007ffeb2f81410 RCX: 00000000004450f7 [ 36.737368] RDX: 0000000000000000 RSI: 00007ffeb2f80d90 RDI: 0000000008000000 [ 36.744657] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000000000018 [ 36.751928] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 36.759189] R13: 0000000000403430 R14: 0000000000000000 R15: 0000000000000000 [ 36.766495] Modules linked in: [ 36.769894] ---[ end trace c533a18b6950cfa6 ]--- [ 36.774657] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 36.779450] 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 [ 36.798381] RSP: 0018:ffff8801be7cf928 EFLAGS: 00010203 [ 36.803769] RAX: dffffc0000000000 RBX: ffff8801cb8fe700 RCX: ffffffff8160aca1 [ 36.811095] RDX: 062627aa49e9c92a RSI: ffffffff833deb15 RDI: 31313d524f4e4955 [ 36.818376] RBP: ffff8801be7cf948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 36.825668] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7acab00 [ 36.832967] R13: 31313d524f4e494d R14: ffff8801cb8fe798 R15: ffff8801cb8fe798 [ 36.840279] FS: 0000000000cb7880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 36.848505] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.854419] CR2: 000000000046da60 CR3: 00000001bc17a000 CR4: 00000000001406f0 [ 36.861769] Kernel panic - not syncing: Fatal exception [ 36.868031] Kernel Offset: disabled [ 36.871671] Rebooting in 86400 seconds..