[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.165734] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.223224] random: sshd: uninitialized urandom read (32 bytes read) [ 36.516734] random: sshd: uninitialized urandom read (32 bytes read) [ 37.968306] random: sshd: uninitialized urandom read (32 bytes read) [ 38.197734] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts. [ 43.698924] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 43.820685] WARNING: CPU: 1 PID: 4588 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 43.829250] Kernel panic - not syncing: panic_on_warn set ... [ 43.829250] [ 43.836627] CPU: 1 PID: 4588 Comm: syz-executor709 Not tainted 4.18.0-rc5+ #29 [ 43.843982] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.853344] Call Trace: [ 43.855952] dump_stack+0x185/0x1e0 [ 43.859611] panic+0x3d0/0x9b0 [ 43.862817] __warn+0x40f/0x580 [ 43.866099] ? smc_unhash_sk+0x37b/0x3f0 [ 43.870170] report_bug+0x72a/0x880 [ 43.873808] ? smc_unhash_sk+0x37b/0x3f0 [ 43.877885] ? smc_unhash_sk+0x37b/0x3f0 [ 43.881994] do_error_trap+0x1fe/0x710 [ 43.885922] ? sock_destroy_inode+0xab/0xd0 [ 43.890281] ? sock_alloc_inode+0x2b0/0x2b0 [ 43.894640] do_invalid_op+0x46/0x50 [ 43.898370] invalid_op+0x14/0x20 [ 43.901821] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 43.906497] 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 [ 43.925842] RSP: 0018:ffff88018d3ff9f8 EFLAGS: 00010293 [ 43.931224] RAX: ffffffff89ee446b RBX: ffff8801b90e0080 RCX: ffff88018c08bb00 [ 43.938499] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a565400 [ 43.945779] RBP: ffff88018d3ffa78 R08: 0000000000480020 R09: 0000000000000002 [ 43.953095] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000 [ 43.960377] R13: ffff8801b90e0000 R14: 0000000000000001 R15: 00000000fa200098 [ 43.967680] ? smc_hash_sk+0x3a0/0x3a0 [ 43.971573] ? smc_unhash_sk+0x37b/0x3f0 [ 43.975662] ? smc_unhash_sk+0x37b/0x3f0 [ 43.979752] ? smc_hash_sk+0x3a0/0x3a0 [ 43.983640] smc_release+0x81b/0x900 [ 43.987373] ? smc_sock_alloc+0x830/0x830 [ 43.991540] sock_close+0x11e/0x360 [ 43.995187] __fput+0x458/0xa30 [ 43.998484] ? fput+0x300/0x300 [ 44.001780] ____fput+0x37/0x40 [ 44.005089] task_work_run+0x22e/0x2b0 [ 44.008989] do_exit+0x110e/0x3930 [ 44.012577] do_group_exit+0x1a0/0x360 [ 44.016500] __do_sys_exit_group+0x21/0x30 [ 44.020771] __se_sys_exit_group+0x14/0x20 [ 44.025064] __x64_sys_exit_group+0x4c/0x50 [ 44.029413] ? do_group_exit+0x360/0x360 [ 44.033486] do_syscall_64+0x15b/0x230 [ 44.037383] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 44.042578] RIP: 0033:0x43ecb8 [ 44.045758] Code: Bad RIP value. [ 44.049139] RSP: 002b:00007ffe3b9f5e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.056850] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ecb8 [ 44.064114] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 44.071378] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 44.078641] R10: 0000000020004010 R11: 0000000000000246 R12: 0000000000000001 [ 44.085913] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 44.093766] Dumping ftrace buffer: [ 44.097300] (ftrace buffer empty) [ 44.101000] Kernel Offset: disabled [ 44.104637] Rebooting in 86400 seconds..