[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.910520] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.137880] random: sshd: uninitialized urandom read (32 bytes read) [ 38.500414] random: sshd: uninitialized urandom read (32 bytes read) [ 39.882755] random: sshd: uninitialized urandom read (32 bytes read) [ 40.116680] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. [ 45.711844] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 45.834373] WARNING: CPU: 1 PID: 4634 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 45.842938] Kernel panic - not syncing: panic_on_warn set ... [ 45.842938] [ 45.850336] CPU: 1 PID: 4634 Comm: syz-executor931 Not tainted 4.18.0-rc4+ #27 [ 45.857702] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.867060] Call Trace: [ 45.869674] dump_stack+0x185/0x1e0 [ 45.873337] panic+0x3d0/0x9b0 [ 45.876544] __warn+0x40f/0x580 [ 45.879833] ? smc_unhash_sk+0x37b/0x3f0 [ 45.883903] report_bug+0x72a/0x880 [ 45.887547] ? smc_unhash_sk+0x37b/0x3f0 [ 45.891611] ? smc_unhash_sk+0x37b/0x3f0 [ 45.895711] do_error_trap+0x1fe/0x710 [ 45.899656] ? sock_destroy_inode+0xab/0xd0 [ 45.904007] ? sock_alloc_inode+0x2b0/0x2b0 [ 45.908369] do_invalid_op+0x46/0x50 [ 45.912100] invalid_op+0x14/0x20 [ 45.915566] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 45.920222] 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 [ 45.939568] RSP: 0018:ffff88019659f9f8 EFLAGS: 00010293 [ 45.944941] RAX: ffffffff89ee346b RBX: ffff8801a5c0c080 RCX: ffff8801cbe20000 [ 45.952500] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0009e28480 [ 45.959770] RBP: ffff88019659fa78 R08: 0000000000480020 R09: 0000000000000002 [ 45.967041] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000 [ 45.974318] R13: ffff8801a5c0c000 R14: 0000000000000001 R15: 000000008ec0009a [ 45.981603] ? smc_hash_sk+0x3a0/0x3a0 [ 45.985490] ? smc_unhash_sk+0x37b/0x3f0 [ 45.989579] ? smc_unhash_sk+0x37b/0x3f0 [ 45.993661] ? smc_hash_sk+0x3a0/0x3a0 [ 45.997546] smc_release+0x81b/0x900 [ 46.001283] ? smc_sock_alloc+0x830/0x830 [ 46.005473] sock_close+0x11e/0x360 [ 46.009149] __fput+0x458/0xa30 [ 46.012461] ? fput+0x300/0x300 [ 46.015853] ____fput+0x37/0x40 [ 46.019147] task_work_run+0x22e/0x2b0 [ 46.023041] do_exit+0x110e/0x3930 [ 46.026613] do_group_exit+0x1a0/0x360 [ 46.030519] __do_sys_exit_group+0x21/0x30 [ 46.034765] __se_sys_exit_group+0x14/0x20 [ 46.039016] __x64_sys_exit_group+0x4c/0x50 [ 46.043373] ? do_group_exit+0x360/0x360 [ 46.047442] do_syscall_64+0x15b/0x230 [ 46.051343] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 46.056527] RIP: 0033:0x43ec88 [ 46.059701] Code: Bad RIP value. [ 46.063075] RSP: 002b:00007ffcdea2ff48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.070785] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 46.078143] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 46.085417] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 46.092684] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 46.099955] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 46.107842] Dumping ftrace buffer: [ 46.111382] (ftrace buffer empty) [ 46.115089] Kernel Offset: disabled [ 46.118715] Rebooting in 86400 seconds..