[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.959986] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.628399] random: sshd: uninitialized urandom read (32 bytes read) [ 22.084429] random: sshd: uninitialized urandom read (32 bytes read) [ 22.827541] random: sshd: uninitialized urandom read (32 bytes read) [ 22.977895] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. [ 28.428537] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.534125] WARNING: CPU: 1 PID: 4497 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 28.542487] Kernel panic - not syncing: panic_on_warn set ... [ 28.542487] [ 28.549828] CPU: 1 PID: 4497 Comm: syz-executor773 Not tainted 4.17.0-rc4+ #46 [ 28.557159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.566485] Call Trace: [ 28.569052] dump_stack+0x1b9/0x294 [ 28.572656] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.577825] ? smc_unhash_sk+0x330/0x4a0 [ 28.581864] panic+0x22f/0x4de [ 28.585035] ? add_taint.cold.5+0x16/0x16 [ 28.589162] ? __warn.cold.8+0x148/0x1b3 [ 28.593201] ? __warn.cold.8+0x117/0x1b3 [ 28.597238] ? smc_unhash_sk+0x345/0x4a0 [ 28.601277] __warn.cold.8+0x163/0x1b3 [ 28.605143] ? smc_unhash_sk+0x345/0x4a0 [ 28.609181] report_bug+0x252/0x2d0 [ 28.612789] do_error_trap+0x1de/0x490 [ 28.616654] ? graph_lock+0x170/0x170 [ 28.620432] ? math_error+0x420/0x420 [ 28.624212] ? lock_acquire+0x1dc/0x520 [ 28.628165] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.632985] do_invalid_op+0x1b/0x20 [ 28.636679] invalid_op+0x14/0x20 [ 28.640111] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 28.644751] RSP: 0018:ffff8801ad3bf488 EFLAGS: 00010293 [ 28.650090] RAX: ffff8801aebc6300 RBX: ffff8801ad4557c0 RCX: ffffffff8740565e [ 28.657338] RDX: 0000000000000000 RSI: ffffffff87405715 RDI: 0000000000000005 [ 28.664583] RBP: ffff8801ad3bf570 R08: ffff8801aebc6300 R09: ffffed0035a8ab08 [ 28.671828] R10: ffffed0035a8ab08 R11: ffff8801ad455843 R12: 1ffff10035a77e95 [ 28.679074] R13: ffff8801ad3bf548 R14: ffffffff8970cba0 R15: ffff8801ad455840 [ 28.686325] ? smc_unhash_sk+0x28e/0x4a0 [ 28.690362] ? smc_unhash_sk+0x345/0x4a0 [ 28.694401] ? smc_unhash_sk+0x345/0x4a0 [ 28.698439] ? smc_rx_data_available+0x100/0x100 [ 28.703172] ? release_sock+0x1e2/0x2b0 [ 28.707127] ? __local_bh_enable_ip+0x161/0x230 [ 28.711774] ? __release_sock+0x3a0/0x3a0 [ 28.715899] ? smc_release+0x269/0x610 [ 28.719764] ? trace_hardirqs_on+0xd/0x10 [ 28.723889] ? __local_bh_enable_ip+0x161/0x230 [ 28.728535] smc_release+0x36e/0x610 [ 28.732228] sock_release+0x96/0x1b0 [ 28.735921] ? sock_alloc_file+0x4e0/0x4e0 [ 28.740131] sock_close+0x16/0x20 [ 28.743562] __fput+0x34d/0x890 [ 28.746820] ? fput+0x1a0/0x1a0 [ 28.750076] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.754552] ____fput+0x15/0x20 [ 28.757809] task_work_run+0x1e4/0x290 [ 28.761672] ? task_work_cancel+0x240/0x240 [ 28.765976] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.771489] ? switch_task_namespaces+0xa2/0xd0 [ 28.776137] do_exit+0x1aee/0x2730 [ 28.779656] ? mm_update_next_owner+0x980/0x980 [ 28.784307] ? find_held_lock+0x36/0x1c0 [ 28.788349] ? lock_downgrade+0x8e0/0x8e0 [ 28.792475] ? lock_downgrade+0x8e0/0x8e0 [ 28.796603] ? kasan_check_read+0x11/0x20 [ 28.800727] ? do_raw_spin_unlock+0x9e/0x2e0 [ 28.805112] ? __local_bh_enable_ip+0x161/0x230 [ 28.809757] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.814748] ? release_sock+0x1e2/0x2b0 [ 28.818700] ? trace_hardirqs_on+0xd/0x10 [ 28.822825] ? __local_bh_enable_ip+0x161/0x230 [ 28.827473] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.831857] ? release_sock+0x1e2/0x2b0 [ 28.835811] ? __release_sock+0x3a0/0x3a0 [ 28.839935] ? __local_bh_enable_ip+0x161/0x230 [ 28.844582] ? lock_sock_nested+0xe7/0x120 [ 28.848794] ? smc_sendmsg+0x2d5/0x370 [ 28.852656] ? smc_sendpage+0x1a0/0x1a0 [ 28.856608] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.862119] ? sock_sendmsg+0x5a/0x120 [ 28.865983] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.871497] ? __sys_sendto+0x475/0x670 [ 28.875448] ? __ia32_sys_getpeername+0xb0/0xb0 [ 28.880093] ? lock_downgrade+0x8e0/0x8e0 [ 28.884217] ? handle_mm_fault+0x8c0/0xc70 [ 28.888431] ? handle_mm_fault+0x55a/0xc70 [ 28.892648] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.898163] do_group_exit+0x16f/0x430 [ 28.902031] ? mm_fault_error+0x380/0x380 [ 28.906157] ? __ia32_sys_exit+0x50/0x50 [ 28.910193] ? delayed_put_pid+0x30/0x30 [ 28.914232] ? do_syscall_64+0x92/0x800 [ 28.918186] __x64_sys_exit_group+0x3e/0x50 [ 28.922486] do_syscall_64+0x1b1/0x800 [ 28.926351] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.931259] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.936169] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.941510] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.946331] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.951496] RIP: 0033:0x43e928 [ 28.954664] RSP: 002b:00007ffe477f6418 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.962349] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e928 [ 28.969596] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 28.976841] RBP: 00000000004be2c0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 28.984086] R10: 0000000020040880 R11: 0000000000000246 R12: 0000000000000001 [ 28.991329] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 28.999114] Dumping ftrace buffer: [ 29.002698] (ftrace buffer empty) [ 29.006383] Kernel Offset: disabled [ 29.009990] Rebooting in 86400 seconds..