[....] Starting OpenBSD Secure Shell server: sshd[ 26.027689] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.298126] random: sshd: uninitialized urandom read (32 bytes read) [ 30.697154] sshd (5569) used greatest stack depth: 16408 bytes left [ 30.731540] random: sshd: uninitialized urandom read (32 bytes read) [ 31.305560] random: sshd: uninitialized urandom read (32 bytes read) [ 31.531344] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. [ 37.179736] random: sshd: uninitialized urandom read (32 bytes read) [ 37.308224] kasan: CONFIG_KASAN_INLINE enabled [ 37.310239] IPVS: ftp: loaded support on port[0] = 21 [ 37.312975] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.325679] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.331920] CPU: 0 PID: 5596 Comm: syz-executor264 Not tainted 4.19.0-rc3-next-20180912+ #72 [ 37.340486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.349853] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.354604] 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 [ 37.373500] RSP: 0018:ffff8801c969f928 EFLAGS: 00010a06 [ 37.378866] RAX: dffffc0000000000 RBX: ffff8801cdaee140 RCX: ffffffff8160aca1 [ 37.386130] RDX: 102c003ee00001b1 RSI: ffffffff833deb15 RDI: 816001f700000d88 [ 37.393397] RBP: ffff8801c969f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.400664] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ac2e40 [ 37.407930] R13: 816001f700000d80 R14: ffff8801cdaee1d8 R15: ffff8801cdaee1d8 [ 37.415202] FS: 0000000001e29880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 37.423422] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.429299] CR2: 000000000046df30 CR3: 00000001d9295000 CR4: 00000000001406f0 [ 37.436572] Call Trace: [ 37.439165] vfs_get_tree+0x1cb/0x5c0 [ 37.442968] mq_create_mount+0xe3/0x190 [ 37.446944] mq_init_ns+0x15a/0x210 [ 37.450567] copy_ipcs+0x3d2/0x580 [ 37.454103] ? ipcns_get+0xe0/0xe0 [ 37.457643] ? do_mount+0x1db0/0x1db0 [ 37.461451] ? kmem_cache_alloc+0x33a/0x730 [ 37.465778] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.471320] ? perf_event_namespaces+0x136/0x400 [ 37.476079] create_new_namespaces+0x376/0x900 [ 37.480666] ? sys_ni_syscall+0x20/0x20 [ 37.484646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.490179] ? ns_capable_common+0x13f/0x170 [ 37.494609] unshare_nsproxy_namespaces+0xc3/0x1f0 [ 37.499567] ksys_unshare+0x79c/0x10b0 [ 37.503464] ? walk_process_tree+0x440/0x440 [ 37.507873] ? lock_downgrade+0x900/0x900 [ 37.512025] ? kasan_check_read+0x11/0x20 [ 37.516175] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.520580] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.525175] ? kasan_check_write+0x14/0x20 [ 37.529415] ? do_raw_read_unlock+0x3f/0x60 [ 37.533741] ? do_syscall_64+0x9a/0x820 [ 37.537713] ? do_syscall_64+0x9a/0x820 [ 37.541687] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.546274] ? trace_hardirqs_on+0xbd/0x310 [ 37.550598] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.555969] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 37.561421] ? __ia32_sys_prlimit64+0x8c0/0x8c0 [ 37.566094] __x64_sys_unshare+0x31/0x40 [ 37.570161] do_syscall_64+0x1b9/0x820 [ 37.574052] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.579417] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.584364] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.589219] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.594256] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.599272] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.604294] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.609157] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.614342] RIP: 0033:0x445587 [ 37.617536] Code: 00 00 00 b8 63 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d d7 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 6d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.636448] RSP: 002b:00007ffca8e77418 EFLAGS: 00000217 ORIG_RAX: 0000000000000110 [ 37.644155] RAX: ffffffffffffffda RBX: 00007ffca8e77480 RCX: 0000000000445587 [ 37.651420] RDX: 0000000000000000 RSI: 00007ffca8e77420 RDI: 0000000008000000 [ 37.658692] RBP: 585858582e72656c R08: 0000000000000000 R09: 0000000001e29880 [ 37.665964] R10: 0000000000000000 R11: 0000000000000217 R12: 6c616b7a79732f2e [ 37.673235] R13: 0000000000403210 R14: 0000000000000000 R15: 0000000000000000 [ 37.680517] Modules linked in: [ 37.683799] ---[ end trace c936530f40da7e5d ]--- [ 37.688572] RIP: 0010:mqueue_get_tree+0xba/0x2e0 [ 37.693382] 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 [ 37.712333] RSP: 0018:ffff8801c969f928 EFLAGS: 00010a06 [ 37.717738] RAX: dffffc0000000000 RBX: ffff8801cdaee140 RCX: ffffffff8160aca1 [ 37.725064] RDX: 102c003ee00001b1 RSI: ffffffff833deb15 RDI: 816001f700000d88 [ 37.732365] RBP: ffff8801c969f948 R08: fffffbfff13555fd R09: fffffbfff13555fc [ 37.739676] R10: fffffbfff13555fc R11: ffffffff89aaafe3 R12: ffff8801d7ac2e40 [ 37.746973] R13: 816001f700000d80 R14: ffff8801cdaee1d8 R15: ffff8801cdaee1d8 [ 37.754281] FS: 0000000001e29880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 37.762516] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.768429] CR2: 000000000046df30 CR3: 00000001d9295000 CR4: 00000000001406f0 [ 37.775738] Kernel panic - not syncing: Fatal exception [ 37.781960] Kernel Offset: disabled [ 37.785584] Rebooting in 86400 seconds..