[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 35.449324] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 40.429123] random: sshd: uninitialized urandom read (32 bytes read) [ 40.916700] random: sshd: uninitialized urandom read (32 bytes read) [ 42.423338] random: sshd: uninitialized urandom read (32 bytes read) [ 42.674784] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. [ 48.430062] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 48.556687] WARNING: CPU: 1 PID: 4593 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 48.565265] Kernel panic - not syncing: panic_on_warn set ... [ 48.565265] [ 48.573426] CPU: 1 PID: 4593 Comm: syz-executor965 Not tainted 4.18.0-rc5+ #29 [ 48.580817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.590202] Call Trace: [ 48.592856] dump_stack+0x185/0x1e0 [ 48.596523] panic+0x3d0/0x9b0 [ 48.599749] __warn+0x40f/0x580 [ 48.603062] ? smc_unhash_sk+0x37b/0x3f0 [ 48.607166] report_bug+0x72a/0x880 [ 48.610808] ? smc_unhash_sk+0x37b/0x3f0 [ 48.614898] ? smc_unhash_sk+0x37b/0x3f0 [ 48.618991] do_error_trap+0x1fe/0x710 [ 48.622928] ? sock_destroy_inode+0xab/0xd0 [ 48.627294] ? sock_alloc_inode+0x2b0/0x2b0 [ 48.631662] do_invalid_op+0x46/0x50 [ 48.635422] invalid_op+0x14/0x20 [ 48.638900] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 48.643589] 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 [ 48.663028] RSP: 0018:ffff8801ab87f9f8 EFLAGS: 00010293 [ 48.668480] RAX: ffffffff89ee446b RBX: ffff8801b295c080 RCX: ffff880191453b00 [ 48.675768] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a2f8280 [ 48.683106] RBP: ffff8801ab87fa78 R08: 0000000000480020 R09: 0000000000000002 [ 48.690410] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000 [ 48.697718] R13: ffff8801b295c000 R14: 0000000000000001 R15: 000000008b200099 [ 48.705046] ? smc_hash_sk+0x3a0/0x3a0 [ 48.708996] ? smc_unhash_sk+0x37b/0x3f0 [ 48.713144] ? smc_unhash_sk+0x37b/0x3f0 [ 48.717316] ? smc_hash_sk+0x3a0/0x3a0 [ 48.721252] smc_release+0x81b/0x900 [ 48.725029] ? smc_sock_alloc+0x830/0x830 [ 48.729242] sock_close+0x11e/0x360 [ 48.732947] __fput+0x458/0xa30 [ 48.736286] ? fput+0x300/0x300 [ 48.739611] ____fput+0x37/0x40 [ 48.742957] task_work_run+0x22e/0x2b0 [ 48.746908] do_exit+0x110e/0x3930 [ 48.750529] do_group_exit+0x1a0/0x360 [ 48.754478] __do_sys_exit_group+0x21/0x30 [ 48.758772] __se_sys_exit_group+0x14/0x20 [ 48.763090] __x64_sys_exit_group+0x4c/0x50 [ 48.767455] ? do_group_exit+0x360/0x360 [ 48.771560] do_syscall_64+0x15b/0x230 [ 48.775475] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 48.780860] RIP: 0033:0x43ecc8 [ 48.784059] Code: Bad RIP value. [ 48.787461] RSP: 002b:00007ffcc8e71b38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 48.795198] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ecc8 [ 48.802492] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 48.809802] RBP: 00000000004be588 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 48.817092] R10: 0000000020000010 R11: 0000000000000246 R12: 0000000000000001 [ 48.824398] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 48.832259] Dumping ftrace buffer: [ 48.835854] (ftrace buffer empty) [ 48.839614] Kernel Offset: disabled [ 48.843294] Rebooting in 86400 seconds..