[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.864356] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.696398] random: sshd: uninitialized urandom read (32 bytes read) [ 20.917949] random: sshd: uninitialized urandom read (32 bytes read) [ 21.617516] random: sshd: uninitialized urandom read (32 bytes read) [ 24.124436] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts. [ 29.555935] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 29.662575] kasan: CONFIG_KASAN_INLINE enabled [ 29.667275] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.674692] general protection fault: 0000 [#1] SMP KASAN [ 29.680220] Dumping ftrace buffer: [ 29.683738] (ftrace buffer empty) [ 29.687423] Modules linked in: [ 29.690595] CPU: 0 PID: 4452 Comm: syz-executor014 Not tainted 4.17.0-rc2+ #19 [ 29.697928] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.707271] RIP: 0010:smc_set_keepalive+0x4e/0xd0 [ 29.712087] RSP: 0018:ffff8801b4effa68 EFLAGS: 00010202 [ 29.717426] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d68bcb [ 29.724672] RDX: 0000000000000004 RSI: ffffffff873e68c4 RDI: 0000000000000020 [ 29.731916] RBP: ffff8801b4effa80 R08: ffff8801b49b8740 R09: 0000000000000006 [ 29.739170] R10: ffff8801b49b8740 R11: 0000000000000000 R12: ffff8801b4f9b7c0 [ 29.746418] R13: 0000000000000001 R14: 0000000000000003 R15: ffff8801ae2055c0 [ 29.753669] FS: 0000000000f6d880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 29.761880] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.767736] CR2: 0000000020000040 CR3: 00000001b482f000 CR4: 00000000001406f0 [ 29.774984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.782233] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.789478] Call Trace: [ 29.792060] ? calipso_cache_add+0x140/0x140 [ 29.796452] sock_setsockopt+0x14e2/0x1f40 [ 29.800667] ? sock_enable_timestamp+0xe0/0xe0 [ 29.805236] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.810751] ? __fget_light+0x2ef/0x430 [ 29.814703] ? fget_raw+0x20/0x20 [ 29.818139] ? lock_downgrade+0x8e0/0x8e0 [ 29.822263] ? handle_mm_fault+0x8c0/0xc70 [ 29.826481] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 29.831996] ? handle_mm_fault+0x55a/0xc70 [ 29.836218] ? security_socket_setsockopt+0x94/0xc0 [ 29.841218] __sys_setsockopt+0x2df/0x390 [ 29.845349] ? kernel_accept+0x310/0x310 [ 29.849388] ? mm_fault_error+0x380/0x380 [ 29.853518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.859043] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 29.863863] __x64_sys_setsockopt+0xbe/0x150 [ 29.868247] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.873239] do_syscall_64+0x1b1/0x800 [ 29.877103] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 29.881928] ? syscall_return_slowpath+0x5c0/0x5c0 [ 29.886839] ? syscall_return_slowpath+0x30f/0x5c0 [ 29.891749] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.897264] ? retint_user+0x18/0x18 [ 29.900956] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.905778] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.910943] RIP: 0033:0x43fcf9 [ 29.914107] RSP: 002b:00007ffd725fd188 EFLAGS: 00000217 ORIG_RAX: 0000000000000036 [ 29.921804] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcf9 [ 29.929048] RDX: 0000000000000009 RSI: 0000000000000001 RDI: 0000000000000003 [ 29.936294] RBP: 00000000006ca018 R08: 0000000000000004 R09: 00000000004002c8 [ 29.943545] R10: 0000000020000040 R11: 0000000000000217 R12: 0000000000401620 [ 29.950798] R13: 00000000004016b0 R14: 0000000000000000 R15: 0000000000000000 [ 29.958044] Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 78 48 8b 9b 50 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 6b 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 20 48 [ 29.977190] RIP: smc_set_keepalive+0x4e/0xd0 RSP: ffff8801b4effa68 [ 29.983586] ---[ end trace fd4053905e5579ec ]--- [ 29.988358] Kernel panic - not syncing: Fatal exception [ 29.994187] Dumping ftrace buffer: [ 29.997708] (ftrace buffer empty) [ 30.001394] Kernel Offset: disabled [ 30.004996] Rebooting in 86400 seconds..