[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 32.960325] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 35.837647] random: sshd: uninitialized urandom read (32 bytes read) [ 36.163690] random: sshd: uninitialized urandom read (32 bytes read) [ 37.573671] random: sshd: uninitialized urandom read (32 bytes read) [ 37.794318] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. [ 43.442629] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 43.558876] WARNING: CPU: 0 PID: 4540 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 43.567391] Kernel panic - not syncing: panic_on_warn set ... [ 43.567391] [ 43.574756] CPU: 0 PID: 4540 Comm: syz-executor650 Not tainted 4.18.0-rc4+ #25 [ 43.582102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.591445] Call Trace: [ 43.594038] dump_stack+0x185/0x1e0 [ 43.597679] panic+0x3d0/0x9b0 [ 43.600875] ? blkg_rwstat_recursive_sum+0x23a/0xb60 [ 43.605977] __warn+0x40f/0x580 [ 43.609250] ? smc_unhash_sk+0x37b/0x3f0 [ 43.613313] report_bug+0x72a/0x880 [ 43.616934] ? smc_unhash_sk+0x37b/0x3f0 [ 43.620991] ? smc_unhash_sk+0x37b/0x3f0 [ 43.625064] do_error_trap+0x1fe/0x710 [ 43.628973] ? sock_destroy_inode+0xab/0xd0 [ 43.633307] ? sock_alloc_inode+0x2b0/0x2b0 [ 43.637648] do_invalid_op+0x46/0x50 [ 43.641371] invalid_op+0x14/0x20 [ 43.644818] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 43.649469] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 30 a8 d5 f7 e9 f7 fe ff ff 8b 3a e8 24 a8 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 02 a8 d5 f7 4d 85 e4 [ 43.668799] RSP: 0018:ffff88019c68f9f8 EFLAGS: 00010293 [ 43.674158] RAX: ffffffff89ee346b RBX: ffff8801b4730080 RCX: ffff88018fa9d880 [ 43.681430] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a3ab200 [ 43.688690] RBP: ffff88019c68fa78 R08: 0000000000480020 R09: 0000000000000002 [ 43.695948] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000 [ 43.703206] R13: ffff8801b4730000 R14: 0000000000000001 R15: 00000000c3a00099 [ 43.710475] ? smc_hash_sk+0x3a0/0x3a0 [ 43.714355] ? smc_unhash_sk+0x37b/0x3f0 [ 43.718425] ? smc_unhash_sk+0x37b/0x3f0 [ 43.722497] ? smc_hash_sk+0x3a0/0x3a0 [ 43.726395] smc_release+0x81b/0x900 [ 43.730120] ? smc_sock_alloc+0x830/0x830 [ 43.734277] sock_close+0x11e/0x360 [ 43.737911] __fput+0x458/0xa30 [ 43.741201] ? fput+0x300/0x300 [ 43.744484] ____fput+0x37/0x40 [ 43.747775] task_work_run+0x22e/0x2b0 [ 43.751660] do_exit+0x110e/0x3930 [ 43.755205] do_group_exit+0x1a0/0x360 [ 43.759105] __do_sys_exit_group+0x21/0x30 [ 43.763356] __se_sys_exit_group+0x14/0x20 [ 43.767600] __x64_sys_exit_group+0x4c/0x50 [ 43.771929] ? do_group_exit+0x360/0x360 [ 43.775993] do_syscall_64+0x15b/0x230 [ 43.779883] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 43.785063] RIP: 0033:0x43ee28 [ 43.788233] Code: Bad RIP value. [ 43.791603] RSP: 002b:00007fffe116f738 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 43.799302] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee28 [ 43.806557] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 43.813815] RBP: 00000000004be6e8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 43.821072] R10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000000001 [ 43.828328] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 43.836052] Dumping ftrace buffer: [ 43.839574] (ftrace buffer empty) [ 43.843268] Kernel Offset: disabled [ 43.846890] Rebooting in 86400 seconds..