[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 32.802631] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.497302] random: sshd: uninitialized urandom read (32 bytes read) [ 36.902212] random: sshd: uninitialized urandom read (32 bytes read) [ 38.311777] random: sshd: uninitialized urandom read (32 bytes read) [ 38.538713] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts. [ 44.082622] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 44.197985] WARNING: CPU: 1 PID: 4546 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 44.206527] Kernel panic - not syncing: panic_on_warn set ... [ 44.206527] [ 44.213902] CPU: 1 PID: 4546 Comm: syz-executor186 Not tainted 4.18.0-rc4+ #27 [ 44.221257] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.230613] Call Trace: [ 44.233210] dump_stack+0x185/0x1e0 [ 44.236851] panic+0x3d0/0x9b0 [ 44.240068] __warn+0x40f/0x580 [ 44.243349] ? smc_unhash_sk+0x37b/0x3f0 [ 44.247407] report_bug+0x72a/0x880 [ 44.251074] ? smc_unhash_sk+0x37b/0x3f0 [ 44.255141] ? smc_unhash_sk+0x37b/0x3f0 [ 44.259215] do_error_trap+0x1fe/0x710 [ 44.263132] ? sock_destroy_inode+0xab/0xd0 [ 44.267468] ? sock_alloc_inode+0x2b0/0x2b0 [ 44.271807] do_invalid_op+0x46/0x50 [ 44.275533] invalid_op+0x14/0x20 [ 44.278986] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 44.283638] 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 [ 44.302964] RSP: 0018:ffff8801ab56f9f8 EFLAGS: 00010293 [ 44.308325] RAX: ffffffff89ee346b RBX: ffff880191a38080 RCX: ffff8801d0f23b00 [ 44.315585] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000969d500 [ 44.322845] RBP: ffff8801ab56fa78 R08: 0000000000480020 R09: 0000000000000002 [ 44.330107] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000 [ 44.337367] R13: ffff880191a38000 R14: 0000000000000001 R15: 00000000cb600099 [ 44.344654] ? smc_hash_sk+0x3a0/0x3a0 [ 44.348538] ? smc_unhash_sk+0x37b/0x3f0 [ 44.352625] ? smc_unhash_sk+0x37b/0x3f0 [ 44.356701] ? smc_hash_sk+0x3a0/0x3a0 [ 44.360586] smc_release+0x81b/0x900 [ 44.364314] ? smc_sock_alloc+0x830/0x830 [ 44.368476] sock_close+0x11e/0x360 [ 44.372117] __fput+0x458/0xa30 [ 44.375409] ? fput+0x300/0x300 [ 44.378690] ____fput+0x37/0x40 [ 44.381976] task_work_run+0x22e/0x2b0 [ 44.385867] do_exit+0x110e/0x3930 [ 44.389430] do_group_exit+0x1a0/0x360 [ 44.393338] __do_sys_exit_group+0x21/0x30 [ 44.397586] __se_sys_exit_group+0x14/0x20 [ 44.401834] __x64_sys_exit_group+0x4c/0x50 [ 44.406168] ? do_group_exit+0x360/0x360 [ 44.410236] do_syscall_64+0x15b/0x230 [ 44.414136] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 44.419318] RIP: 0033:0x43ec98 [ 44.422503] Code: Bad RIP value. [ 44.425874] RSP: 002b:00007ffd43831cd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.433584] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec98 [ 44.440843] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 44.448103] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 44.455374] R10: 0000000020000180 R11: 0000000000000246 R12: 0000000000000001 [ 44.462634] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 44.470387] Dumping ftrace buffer: [ 44.473911] (ftrace buffer empty) [ 44.477606] Kernel Offset: disabled [ 44.481228] Rebooting in 86400 seconds..