[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.465084] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.586278] random: sshd: uninitialized urandom read (32 bytes read) [ 23.835901] random: sshd: uninitialized urandom read (32 bytes read) [ 24.611398] random: sshd: uninitialized urandom read (32 bytes read) [ 37.948932] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. [ 43.336410] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 43.446279] WARNING: CPU: 0 PID: 4511 at arch/x86/kernel/uprobes.c:296 arch_uprobe_analyze_insn+0x13d/0x15f0 [ 43.456419] Kernel panic - not syncing: panic_on_warn set ... [ 43.456419] [ 43.463784] CPU: 0 PID: 4511 Comm: syz-executor347 Not tainted 4.17.0-rc4+ #46 [ 43.471127] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.480466] Call Trace: [ 43.483051] dump_stack+0x1b9/0x294 [ 43.486686] ? dump_stack_print_info.cold.2+0x52/0x52 [ 43.491915] ? arch_uprobe_analyze_insn+0xf0/0x15f0 [ 43.496918] panic+0x22f/0x4de [ 43.500095] ? add_taint.cold.5+0x16/0x16 [ 43.504319] ? __warn.cold.8+0x148/0x1b3 [ 43.508362] ? __warn.cold.8+0x117/0x1b3 [ 43.512414] ? arch_uprobe_analyze_insn+0x13d/0x15f0 [ 43.517502] __warn.cold.8+0x163/0x1b3 [ 43.521383] ? arch_uprobe_analyze_insn+0x13d/0x15f0 [ 43.526489] report_bug+0x252/0x2d0 [ 43.530123] do_error_trap+0x1de/0x490 [ 43.534009] ? math_error+0x420/0x420 [ 43.537805] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.543341] ? insn_get_opcode.part.3+0x40a/0xa20 [ 43.548169] ? graph_lock+0x170/0x170 [ 43.551972] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.556806] do_invalid_op+0x1b/0x20 [ 43.560507] invalid_op+0x14/0x20 [ 43.563951] RIP: 0010:arch_uprobe_analyze_insn+0x13d/0x15f0 [ 43.569640] RSP: 0018:ffff8801cf277510 EFLAGS: 00010246 [ 43.574984] RAX: 0000000000000000 RBX: ffff8801cf277560 RCX: ffffffff876ccf2a [ 43.582243] RDX: 0000000000000004 RSI: ffffffff876ce6ab RDI: ffff8801cf27759c [ 43.589528] RBP: ffff8801cf277628 R08: ffff8801d8c0a5c0 R09: ffff8801cf277560 [ 43.596805] R10: ffff8801d7ad81d0 R11: ffff8801cf2775af R12: 0000000000000000 [ 43.604079] R13: dffffc0000000000 R14: ffff8801d7ad8080 R15: ffff8801cf277600 [ 43.611354] ? insn_get_immediate.part.7+0x8fa/0x1990 [ 43.616535] ? insn_get_length+0x10b/0x160 [ 43.620766] ? rcu_note_context_switch+0x710/0x710 [ 43.625685] ? branch_post_xol_op+0xe0/0xe0 [ 43.630003] ? memcpy+0x45/0x50 [ 43.633272] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 43.638799] install_breakpoint.isra.21+0x710/0x830 [ 43.643807] ? set_swbp+0x30/0x30 [ 43.647249] ? do_raw_read_unlock+0x3f/0x60 [ 43.651560] ? up_read+0x1a/0x110 [ 43.654997] ? filter_chain+0xd2/0x150 [ 43.658882] uprobe_mmap+0x6a0/0xcf0 [ 43.662586] ? uprobe_apply+0x140/0x140 [ 43.666549] ? rcu_note_context_switch+0x710/0x710 [ 43.671466] ? __might_sleep+0x95/0x190 [ 43.675426] ? up_write+0x72/0x210 [ 43.678947] ? up_read+0x110/0x110 [ 43.682490] ? __vma_link_file+0xe9/0x1b0 [ 43.686627] ? vma_link+0xe9/0x170 [ 43.690154] mmap_region+0x5c8/0x1870 [ 43.693945] ? __x64_sys_brk+0x790/0x790 [ 43.697990] ? arch_get_unmapped_area+0x750/0x750 [ 43.702830] ? lock_acquire+0x1dc/0x520 [ 43.706804] ? vm_mmap_pgoff+0x1a1/0x2a0 [ 43.710859] ? cap_mmap_addr+0x52/0x130 [ 43.714834] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.720365] ? security_mmap_addr+0x80/0xa0 [ 43.724683] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.730205] ? get_unmapped_area+0x292/0x3b0 [ 43.734593] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.740112] do_mmap+0xde2/0x1360 [ 43.743549] ? mmap_region+0x1870/0x1870 [ 43.747608] ? vm_mmap_pgoff+0x1a1/0x2a0 [ 43.751695] ? down_read_killable+0x1f0/0x1f0 [ 43.756198] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.761725] ? security_mmap_file+0x166/0x1b0 [ 43.766208] vm_mmap_pgoff+0x1fb/0x2a0 [ 43.770083] ? vma_is_stack_for_current+0xd0/0xd0 [ 43.774911] ? __sb_end_write+0xac/0xe0 [ 43.778872] ksys_mmap_pgoff+0x4c9/0x640 [ 43.782934] ? find_mergeable_anon_vma+0xd0/0xd0 [ 43.787679] ? __ia32_sys_read+0xb0/0xb0 [ 43.791746] ? filp_open+0x80/0x80 [ 43.795290] __x64_sys_mmap+0xe9/0x1b0 [ 43.799171] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.804174] do_syscall_64+0x1b1/0x800 [ 43.808044] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 43.812868] ? syscall_return_slowpath+0x5c0/0x5c0 [ 43.817789] ? syscall_return_slowpath+0x30f/0x5c0 [ 43.822702] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 43.828055] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.832879] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.838225] RIP: 0033:0x43ff29 [ 43.841395] RSP: 002b:00007ffc922a4898 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 43.849083] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ff29 [ 43.856336] RDX: 0000000000000000 RSI: 0000000000002000 RDI: 000000002000c000 [ 43.863588] RBP: 00000000006ca018 R08: 0000000000000003 R09: 0000000000000000 [ 43.870841] R10: 0000000000000012 R11: 0000000000000212 R12: 0000000000401850 [ 43.878091] R13: 00000000004018e0 R14: 0000000000000000 R15: 0000000000000000 [ 43.885944] Dumping ftrace buffer: [ 43.889618] (ftrace buffer empty) [ 43.893398] Kernel Offset: disabled [ 43.897020] Rebooting in 86400 seconds..