[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 32.887009] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.577205] random: sshd: uninitialized urandom read (32 bytes read) [ 36.854209] random: sshd: uninitialized urandom read (32 bytes read) [ 38.270427] random: sshd: uninitialized urandom read (32 bytes read) [ 42.874962] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. [ 48.396791] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 48.519083] WARNING: CPU: 0 PID: 4546 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 48.527612] Kernel panic - not syncing: panic_on_warn set ... [ 48.527612] [ 48.534982] CPU: 0 PID: 4546 Comm: syz-executor291 Not tainted 4.18.0-rc5+ #29 [ 48.542335] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.551681] Call Trace: [ 48.554281] dump_stack+0x185/0x1e0 [ 48.557923] panic+0x3d0/0x9b0 [ 48.561121] __warn+0x40f/0x580 [ 48.564399] ? smc_unhash_sk+0x37b/0x3f0 [ 48.568460] report_bug+0x72a/0x880 [ 48.572087] ? smc_unhash_sk+0x37b/0x3f0 [ 48.576324] ? smc_unhash_sk+0x37b/0x3f0 [ 48.580401] do_error_trap+0x1fe/0x710 [ 48.584317] ? sock_destroy_inode+0xab/0xd0 [ 48.589001] ? sock_alloc_inode+0x2b0/0x2b0 [ 48.593343] do_invalid_op+0x46/0x50 [ 48.597074] invalid_op+0x14/0x20 [ 48.600525] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 48.605184] 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 [ 48.624510] RSP: 0018:ffff880192f1f9f8 EFLAGS: 00010293 [ 48.629873] RAX: ffffffff89ee446b RBX: ffff8801b5654080 RCX: ffff88018f035880 [ 48.637137] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a405f80 [ 48.644402] RBP: ffff880192f1fa78 R08: 0000000000480020 R09: 0000000000000002 [ 48.651677] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000 [ 48.658948] R13: ffff8801b5654000 R14: 0000000000000001 R15: 0000000093600099 [ 48.666236] ? smc_hash_sk+0x3a0/0x3a0 [ 48.670281] ? smc_unhash_sk+0x37b/0x3f0 [ 48.674363] ? smc_unhash_sk+0x37b/0x3f0 [ 48.678440] ? smc_hash_sk+0x3a0/0x3a0 [ 48.682337] smc_release+0x81b/0x900 [ 48.686101] ? smc_sock_alloc+0x830/0x830 [ 48.690281] sock_close+0x11e/0x360 [ 48.693924] __fput+0x458/0xa30 [ 48.697220] ? fput+0x300/0x300 [ 48.700532] ____fput+0x37/0x40 [ 48.703821] task_work_run+0x22e/0x2b0 [ 48.707708] do_exit+0x110e/0x3930 [ 48.711272] do_group_exit+0x1a0/0x360 [ 48.715178] __do_sys_exit_group+0x21/0x30 [ 48.719425] __se_sys_exit_group+0x14/0x20 [ 48.723714] __x64_sys_exit_group+0x4c/0x50 [ 48.728067] ? do_group_exit+0x360/0x360 [ 48.732136] do_syscall_64+0x15b/0x230 [ 48.736040] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 48.741228] RIP: 0033:0x43ec78 [ 48.744404] Code: Bad RIP value. [ 48.747777] RSP: 002b:00007fff98647068 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 48.755500] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec78 [ 48.762770] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 48.770043] RBP: 00000000004be528 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 48.777310] R10: 0000000020000980 R11: 0000000000000246 R12: 0000000000000001 [ 48.784580] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 48.792359] Dumping ftrace buffer: [ 48.795896] (ftrace buffer empty) [ 48.799593] Kernel Offset: disabled [ 48.803216] Rebooting in 86400 seconds..