[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.239510] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.895604] random: sshd: uninitialized urandom read (32 bytes read) [ 23.346480] random: sshd: uninitialized urandom read (32 bytes read) [ 24.204264] random: sshd: uninitialized urandom read (32 bytes read) [ 24.359886] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.45' (ECDSA) to the list of known hosts. [ 29.902830] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 29.995754] WARNING: CPU: 0 PID: 4542 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 30.004139] Kernel panic - not syncing: panic_on_warn set ... [ 30.004139] [ 30.011491] CPU: 0 PID: 4542 Comm: syz-executor011 Not tainted 4.18.0-rc4+ #144 [ 30.018915] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.028265] Call Trace: [ 30.030846] dump_stack+0x1c9/0x2b4 [ 30.034458] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.039642] panic+0x238/0x4e7 [ 30.042815] ? add_taint.cold.5+0x16/0x16 [ 30.046946] ? __warn.cold.8+0x148/0x1ba [ 30.050983] ? __warn.cold.8+0x117/0x1ba [ 30.055038] ? smc_unhash_sk+0x357/0x4b0 [ 30.059087] __warn.cold.8+0x163/0x1ba [ 30.062954] ? smc_unhash_sk+0x357/0x4b0 [ 30.066997] report_bug+0x252/0x2d0 [ 30.070610] do_error_trap+0x1fc/0x4d0 [ 30.074478] ? math_error+0x3e0/0x3e0 [ 30.078260] ? print_usage_bug+0xc0/0xc0 [ 30.082300] ? lock_acquire+0x1e4/0x540 [ 30.086256] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.091080] do_invalid_op+0x1b/0x20 [ 30.094772] invalid_op+0x14/0x20 [ 30.098207] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 30.102847] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 88 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 e9 52 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 03 2d 58 fa [ 30.122057] RSP: 0018:ffff8801ab95f480 EFLAGS: 00010293 [ 30.127417] RAX: ffff8801abb7e1c0 RBX: ffff8801abba90c0 RCX: ffffffff8761b7f6 [ 30.134666] RDX: 0000000000000000 RSI: ffffffff8761b8b7 RDI: 0000000000000005 [ 30.141915] RBP: ffff8801ab95f568 R08: ffff8801abb7e1c0 R09: ffffed0035775228 [ 30.149163] R10: ffffed0035775228 R11: ffff8801abba9143 R12: 1ffff1003572be94 [ 30.156413] R13: ffff8801ab95f540 R14: ffffffff899372c0 R15: ffff8801abba9140 [ 30.163676] ? smc_unhash_sk+0x296/0x4b0 [ 30.167716] ? smc_unhash_sk+0x357/0x4b0 [ 30.171773] ? smc_rx_data_available+0x120/0x120 [ 30.176513] ? release_sock+0x1ec/0x2c0 [ 30.180470] ? __local_bh_enable_ip+0x161/0x230 [ 30.185123] ? __release_sock+0x3a0/0x3a0 [ 30.189253] ? smc_release+0x2c9/0x670 [ 30.193120] ? trace_hardirqs_on+0xd/0x10 [ 30.197244] ? __local_bh_enable_ip+0x161/0x230 [ 30.201894] smc_release+0x3cf/0x670 [ 30.205592] __sock_release+0xd7/0x260 [ 30.209461] ? __sock_release+0x260/0x260 [ 30.213587] sock_close+0x19/0x20 [ 30.217037] __fput+0x355/0x8b0 [ 30.220299] ? fput+0x1a0/0x1a0 [ 30.223561] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.228044] ____fput+0x15/0x20 [ 30.231304] task_work_run+0x1ec/0x2a0 [ 30.235174] ? task_work_cancel+0x250/0x250 [ 30.239480] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 30.244994] ? switch_task_namespaces+0xa2/0xd0 [ 30.249660] do_exit+0x1b08/0x2750 [ 30.253188] ? lock_downgrade+0x8d1/0x8f0 [ 30.257314] ? mm_update_next_owner+0x9a0/0x9a0 [ 30.261965] ? kasan_check_read+0x11/0x20 [ 30.266092] ? do_raw_spin_unlock+0xa7/0x2f0 [ 30.270478] ? __local_bh_enable_ip+0x161/0x230 [ 30.275129] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.280131] ? release_sock+0x1ec/0x2c0 [ 30.284098] ? trace_hardirqs_on+0xd/0x10 [ 30.288224] ? __local_bh_enable_ip+0x161/0x230 [ 30.292874] ? _raw_spin_unlock_bh+0x30/0x40 [ 30.297265] ? kasan_check_read+0x11/0x20 [ 30.301397] ? rcu_is_watching+0x8c/0x150 [ 30.305523] ? rcu_pm_notify+0xc0/0xc0 [ 30.309404] ? ___sys_sendmsg+0x313/0x930 [ 30.313532] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.318534] ? kfree+0x1e9/0x260 [ 30.321882] ? ___sys_sendmsg+0x318/0x930 [ 30.326020] ? graph_lock+0x170/0x170 [ 30.329821] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.335335] ? __fget_light+0x2f7/0x440 [ 30.339287] ? fget_raw+0x20/0x20 [ 30.342726] ? lock_downgrade+0x8f0/0x8f0 [ 30.346853] ? handle_mm_fault+0x8c4/0xc80 [ 30.351076] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.356598] ? sockfd_lookup_light+0xc5/0x160 [ 30.361074] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.366588] ? __sys_sendmsg+0x1ba/0x290 [ 30.370628] ? __ia32_sys_shutdown+0x80/0x80 [ 30.375023] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.380550] ? __do_page_fault+0x449/0xe50 [ 30.384765] do_group_exit+0x177/0x440 [ 30.388631] ? __ia32_sys_exit+0x50/0x50 [ 30.392672] ? do_syscall_64+0x9a/0x820 [ 30.396626] __x64_sys_exit_group+0x3e/0x50 [ 30.400926] do_syscall_64+0x1b9/0x820 [ 30.404794] ? syscall_return_slowpath+0x5e0/0x5e0 [ 30.409702] ? syscall_return_slowpath+0x31d/0x5e0 [ 30.414624] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.419969] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.424794] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.429969] RIP: 0033:0x43ecf8 [ 30.433153] Code: Bad RIP value. [ 30.436504] RSP: 002b:00007ffc9476ed68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 30.444192] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ecf8 [ 30.451439] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 30.458685] RBP: 00000000004be5a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 30.465931] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 30.473178] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 30.481143] Dumping ftrace buffer: [ 30.484775] (ftrace buffer empty) [ 30.488464] Kernel Offset: disabled [ 30.492069] Rebooting in 86400 seconds..