[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 35.041870] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.640503] random: sshd: uninitialized urandom read (32 bytes read) [ 38.036636] random: sshd: uninitialized urandom read (32 bytes read) [ 39.490344] random: sshd: uninitialized urandom read (32 bytes read) [ 39.732227] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. [ 45.272587] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 45.409700] WARNING: CPU: 1 PID: 4587 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 45.418244] Kernel panic - not syncing: panic_on_warn set ... [ 45.418244] [ 45.425616] CPU: 1 PID: 4587 Comm: syz-executor991 Not tainted 4.18.0-rc5+ #29 [ 45.432967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.442315] Call Trace: [ 45.444914] dump_stack+0x185/0x1e0 [ 45.448544] panic+0x3d0/0x9b0 [ 45.451758] __warn+0x40f/0x580 [ 45.455047] ? smc_unhash_sk+0x37b/0x3f0 [ 45.459109] report_bug+0x72a/0x880 [ 45.462733] ? smc_unhash_sk+0x37b/0x3f0 [ 45.466791] ? smc_unhash_sk+0x37b/0x3f0 [ 45.470871] do_error_trap+0x1fe/0x710 [ 45.474780] ? sock_destroy_inode+0xab/0xd0 [ 45.479128] ? sock_alloc_inode+0x2b0/0x2b0 [ 45.483507] do_invalid_op+0x46/0x50 [ 45.487619] invalid_op+0x14/0x20 [ 45.491080] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 45.495738] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 30 95 d5 f7 e9 f7 fe ff ff 8b 3a e8 24 95 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 95 e0 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 02 95 d5 f7 4d 85 e4 [ 45.515090] RSP: 0018:ffff88019ddaf9f8 EFLAGS: 00010293 [ 45.520497] RAX: ffffffff89ee446b RBX: ffff8801bd49c080 RCX: ffff8801c4a5d880 [ 45.527803] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a6fba80 [ 45.535087] RBP: ffff88019ddafa78 R08: 0000000000480020 R09: 0000000000000002 [ 45.542374] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000 [ 45.549658] R13: ffff8801bd49c000 R14: 0000000000000001 R15: 00000000fee00098 [ 45.556945] ? smc_hash_sk+0x3a0/0x3a0 [ 45.560847] ? smc_unhash_sk+0x37b/0x3f0 [ 45.564933] ? smc_unhash_sk+0x37b/0x3f0 [ 45.569022] ? smc_hash_sk+0x3a0/0x3a0 [ 45.572924] smc_release+0x81b/0x900 [ 45.576664] ? smc_sock_alloc+0x830/0x830 [ 45.581003] sock_close+0x11e/0x360 [ 45.584643] __fput+0x458/0xa30 [ 45.587934] ? fput+0x300/0x300 [ 45.591219] ____fput+0x37/0x40 [ 45.594495] task_work_run+0x22e/0x2b0 [ 45.598406] do_exit+0x110e/0x3930 [ 45.601973] do_group_exit+0x1a0/0x360 [ 45.605883] __do_sys_exit_group+0x21/0x30 [ 45.610141] __se_sys_exit_group+0x14/0x20 [ 45.614387] __x64_sys_exit_group+0x4c/0x50 [ 45.618738] ? do_group_exit+0x360/0x360 [ 45.622813] do_syscall_64+0x15b/0x230 [ 45.626717] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 45.631899] RIP: 0033:0x43ed38 [ 45.635075] Code: Bad RIP value. [ 45.638450] RSP: 002b:00007ffc7bef5f98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.646164] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed38 [ 45.653451] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.660718] RBP: 00000000004be5e8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.667980] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 45.675254] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 45.683028] Dumping ftrace buffer: [ 45.686557] (ftrace buffer empty) [ 45.690252] Kernel Offset: disabled [ 45.693878] Rebooting in 86400 seconds..