[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.080691] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.710253] random: sshd: uninitialized urandom read (32 bytes read) [ 31.014905] random: sshd: uninitialized urandom read (32 bytes read) [ 31.610543] random: sshd: uninitialized urandom read (32 bytes read) [ 31.825094] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.218' (ECDSA) to the list of known hosts. [ 37.425930] random: sshd: uninitialized urandom read (32 bytes read) [ 37.570807] kasan: CONFIG_KASAN_INLINE enabled [ 37.575522] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.583256] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.589548] CPU: 1 PID: 5587 Comm: syz-executor329 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 37.598144] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.607511] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.612265] 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 [ 37.631163] RSP: 0018:ffff8801bad6f928 EFLAGS: 00010203 [ 37.636527] RAX: dffffc0000000000 RBX: ffff8801cd9a5d00 RCX: ffffffff8160aca1 [ 37.643805] RDX: 0000000000018016 RSI: ffffffff833deb15 RDI: 00000000000c00b6 [ 37.651076] RBP: ffff8801bad6f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.658344] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ad1200 [ 37.665612] R13: 00000000000c00ae R14: ffff8801cd9a5d98 R15: ffff8801cd9a5d98 [ 37.672886] FS: 00000000025c0940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 37.681127] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.687006] CR2: 000000000046d210 CR3: 00000001d91e3000 CR4: 00000000001406e0 [ 37.694274] Call Trace: [ 37.696873] vfs_get_tree+0x1cb/0x5c0 [ 37.700679] mq_create_mount+0xe3/0x190 [ 37.704655] mq_init_ns+0x15a/0x210 [ 37.708288] copy_ipcs+0x3d2/0x580 [ 37.711836] ? ipcns_get+0xe0/0xe0 [ 37.715381] ? do_mount+0x1db0/0x1db0 [ 37.719182] ? kmem_cache_alloc+0x33a/0x730 [ 37.723512] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.729051] ? perf_event_namespaces+0x136/0x400 [ 37.733819] create_new_namespaces+0x376/0x900 [ 37.738412] ? sys_ni_syscall+0x20/0x20 [ 37.742390] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.747928] ? ns_capable_common+0x13f/0x170 [ 37.752340] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 37.757276] ksys_unshare+0x79c/0x10b0 [ 37.761175] ? walk_process_tree+0x440/0x440 [ 37.765591] ? lock_downgrade+0x900/0x900 [ 37.769750] ? kasan_check_read+0x11/0x20 [ 37.773897] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.778313] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.782903] ? kasan_check_write+0x14/0x20 [ 37.787137] ? do_raw_read_unlock+0x3f/0x60 [ 37.791460] ? do_syscall_64+0x9a/0x820 [ 37.795435] ? do_syscall_64+0x9a/0x820 [ 37.799415] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.804006] ? trace_hardirqs_on+0xbd/0x310 [ 37.808335] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.813701] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 37.819153] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 37.823832] __x64_sys_unshare+0x31/0x40 [ 37.827901] do_syscall_64+0x1b9/0x820 [ 37.831798] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.837169] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.842117] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.846962] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.851978] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.856996] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.862019] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.866867] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.872055] RIP: 0033:0x444ad7 [ 37.875248] 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 [ 37.894148] RSP: 002b:00007ffc6de812c8 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 37.901859] RAX: ffffffffffffffda RBX: 00007ffc6de813c0 RCX: 0000000000444ad7 [ 37.909127] RDX: 0000000000000000 RSI: 00007ffc6de812d0 RDI: 0000000008000000 [ 37.916656] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000000000018 [ 37.923923] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 37.931188] R13: 0000000000402e10 R14: 0000000000000000 R15: 0000000000000000 [ 37.938464] Modules linked in: [ 37.941708] ---[ end trace 1774afb01aa0cfd4 ]--- [ 37.946506] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.951267] 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 [ 37.970196] RSP: 0018:ffff8801bad6f928 EFLAGS: 00010203 [ 37.975568] RAX: dffffc0000000000 RBX: ffff8801cd9a5d00 RCX: ffffffff8160aca1 [ 37.982862] RDX: 0000000000018016 RSI: ffffffff833deb15 RDI: 00000000000c00b6 [ 37.990161] RBP: ffff8801bad6f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.997457] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ad1200 [ 38.004727] R13: 00000000000c00ae R14: ffff8801cd9a5d98 R15: ffff8801cd9a5d98 [ 38.012026] FS: 00000000025c0940(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 [ 38.020279] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.026192] CR2: 000000000046d210 CR3: 00000001d91e3000 CR4: 00000000001406e0 [ 38.033462] Kernel panic - not syncing: Fatal exception [ 38.039810] Kernel Offset: disabled [ 38.043438] Rebooting in 86400 seconds..