[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.505415] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.159500] random: sshd: uninitialized urandom read (32 bytes read) [ 37.472424] random: sshd: uninitialized urandom read (32 bytes read) [ 38.939717] random: sshd: uninitialized urandom read (32 bytes read) [ 39.167171] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. [ 44.630542] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 44.748387] WARNING: CPU: 1 PID: 4578 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 44.756937] Kernel panic - not syncing: panic_on_warn set ... [ 44.756937] [ 44.764308] CPU: 1 PID: 4578 Comm: syz-executor734 Not tainted 4.18.0-rc5+ #29 [ 44.771658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.781016] Call Trace: [ 44.783617] dump_stack+0x185/0x1e0 [ 44.787263] panic+0x3d0/0x9b0 [ 44.790479] ? check_mem_access+0x153a/0x71e0 [ 44.794982] __warn+0x40f/0x580 [ 44.798257] ? smc_unhash_sk+0x37b/0x3f0 [ 44.802318] report_bug+0x72a/0x880 [ 44.805957] ? smc_unhash_sk+0x37b/0x3f0 [ 44.810024] ? smc_unhash_sk+0x37b/0x3f0 [ 44.814140] do_error_trap+0x1fe/0x710 [ 44.818088] ? sock_destroy_inode+0xab/0xd0 [ 44.822440] ? sock_alloc_inode+0x2b0/0x2b0 [ 44.826770] do_invalid_op+0x46/0x50 [ 44.830492] invalid_op+0x14/0x20 [ 44.833943] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 44.838595] 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 [ 44.857920] RSP: 0018:ffff88018ccff9f8 EFLAGS: 00010293 [ 44.863279] RAX: ffffffff89ee446b RBX: ffff880197638080 RCX: ffff88018d758000 [ 44.870545] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea00098c5500 [ 44.877818] RBP: ffff88018ccffa78 R08: 0000000000480020 R09: 0000000000000002 [ 44.885082] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000 [ 44.892359] R13: ffff880197638000 R14: 0000000000000001 R15: 00000000d1000099 [ 44.899648] ? smc_hash_sk+0x3a0/0x3a0 [ 44.903532] ? smc_unhash_sk+0x37b/0x3f0 [ 44.907589] ? smc_unhash_sk+0x37b/0x3f0 [ 44.911667] ? smc_hash_sk+0x3a0/0x3a0 [ 44.915559] smc_release+0x81b/0x900 [ 44.919293] ? smc_sock_alloc+0x830/0x830 [ 44.923470] sock_close+0x11e/0x360 [ 44.927109] __fput+0x458/0xa30 [ 44.930407] ? fput+0x300/0x300 [ 44.933691] ____fput+0x37/0x40 [ 44.936984] task_work_run+0x22e/0x2b0 [ 44.940872] do_exit+0x110e/0x3930 [ 44.944434] do_group_exit+0x1a0/0x360 [ 44.948338] __do_sys_exit_group+0x21/0x30 [ 44.952592] __se_sys_exit_group+0x14/0x20 [ 44.956839] __x64_sys_exit_group+0x4c/0x50 [ 44.961171] ? do_group_exit+0x360/0x360 [ 44.965240] do_syscall_64+0x15b/0x230 [ 44.969125] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 44.974308] RIP: 0033:0x43ec78 [ 44.977481] Code: Bad RIP value. [ 44.980861] RSP: 002b:00007ffecb0fa5b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.988568] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec78 [ 44.995829] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.003097] RBP: 00000000004be528 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.010371] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 45.017630] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 45.025404] Dumping ftrace buffer: [ 45.028935] (ftrace buffer empty) [ 45.032634] Kernel Offset: disabled [ 45.036257] Rebooting in 86400 seconds..