[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.868348] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.841567] random: sshd: uninitialized urandom read (32 bytes read) [ 39.340349] random: sshd: uninitialized urandom read (32 bytes read) [ 40.777308] random: sshd: uninitialized urandom read (32 bytes read) [ 41.007111] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. [ 46.638403] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 46.759276] WARNING: CPU: 0 PID: 4583 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 46.767813] Kernel panic - not syncing: panic_on_warn set ... [ 46.767813] [ 46.775195] CPU: 0 PID: 4583 Comm: syz-executor660 Not tainted 4.18.0-rc4+ #27 [ 46.782551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.791921] Call Trace: [ 46.794528] dump_stack+0x185/0x1e0 [ 46.798188] panic+0x3d0/0x9b0 [ 46.801412] __warn+0x40f/0x580 [ 46.804693] ? smc_unhash_sk+0x37b/0x3f0 [ 46.808757] report_bug+0x72a/0x880 [ 46.812395] ? smc_unhash_sk+0x37b/0x3f0 [ 46.816464] ? smc_unhash_sk+0x37b/0x3f0 [ 46.820545] do_error_trap+0x1fe/0x710 [ 46.824508] ? sock_destroy_inode+0xab/0xd0 [ 46.828860] ? sock_alloc_inode+0x2b0/0x2b0 [ 46.833205] do_invalid_op+0x46/0x50 [ 46.836932] invalid_op+0x14/0x20 [ 46.840387] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 46.845050] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 60 a5 d5 f7 e9 f7 fe ff ff 8b 3a e8 54 a5 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 a5 f6 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 32 a5 d5 f7 4d 85 e4 [ 46.864395] RSP: 0018:ffff8801c0fff9f8 EFLAGS: 00010293 [ 46.869768] RAX: ffffffff89ee346b RBX: ffff8801953d4080 RCX: ffff8801c4f21d80 [ 46.877042] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea00097f6f80 [ 46.884316] RBP: ffff8801c0fffa78 R08: 0000000000480020 R09: 0000000000000002 [ 46.891579] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000 [ 46.898842] R13: ffff8801953d4000 R14: 0000000000000001 R15: 00000000a5000099 [ 46.906338] ? smc_hash_sk+0x3a0/0x3a0 [ 46.910228] ? smc_unhash_sk+0x37b/0x3f0 [ 46.914316] ? smc_unhash_sk+0x37b/0x3f0 [ 46.918402] ? smc_hash_sk+0x3a0/0x3a0 [ 46.922291] smc_release+0x81b/0x900 [ 46.926050] ? smc_sock_alloc+0x830/0x830 [ 46.930244] sock_close+0x11e/0x360 [ 46.933883] __fput+0x458/0xa30 [ 46.937188] ? fput+0x300/0x300 [ 46.940478] ____fput+0x37/0x40 [ 46.943755] task_work_run+0x22e/0x2b0 [ 46.947671] do_exit+0x110e/0x3930 [ 46.951238] do_group_exit+0x1a0/0x360 [ 46.955163] __do_sys_exit_group+0x21/0x30 [ 46.959414] __se_sys_exit_group+0x14/0x20 [ 46.963675] __x64_sys_exit_group+0x4c/0x50 [ 46.968036] ? do_group_exit+0x360/0x360 [ 46.972117] do_syscall_64+0x15b/0x230 [ 46.976024] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 46.981219] RIP: 0033:0x43ef38 [ 46.984399] Code: Bad RIP value. [ 46.987952] RSP: 002b:00007ffc5a56a6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.995670] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ef38 [ 47.002932] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 47.010206] RBP: 00000000004be7e8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 47.017478] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 47.024759] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 47.032567] Dumping ftrace buffer: [ 47.036105] (ftrace buffer empty) [ 47.039809] Kernel Offset: disabled [ 47.043443] Rebooting in 86400 seconds..