[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.759167] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.720917] random: sshd: uninitialized urandom read (32 bytes read) [ 26.061883] random: sshd: uninitialized urandom read (32 bytes read) [ 26.907485] random: sshd: uninitialized urandom read (32 bytes read) [ 27.075577] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.11' (ECDSA) to the list of known hosts. [ 32.609773] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 32.704294] WARNING: CPU: 1 PID: 4528 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 32.712710] Kernel panic - not syncing: panic_on_warn set ... [ 32.712710] [ 32.720063] CPU: 1 PID: 4528 Comm: syz-executor090 Not tainted 4.18.0-rc1+ #107 [ 32.727487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.736819] Call Trace: [ 32.739404] dump_stack+0x1c9/0x2b4 [ 32.743024] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.748223] panic+0x238/0x4e7 [ 32.751487] ? add_taint.cold.5+0x16/0x16 [ 32.755619] ? __warn.cold.8+0x148/0x1ba [ 32.759661] ? __warn.cold.8+0x117/0x1ba [ 32.763708] ? smc_unhash_sk+0x357/0x4b0 [ 32.767752] __warn.cold.8+0x163/0x1ba [ 32.771625] ? smc_unhash_sk+0x357/0x4b0 [ 32.775670] report_bug+0x252/0x2d0 [ 32.779280] do_error_trap+0x1fc/0x4d0 [ 32.783147] ? math_error+0x3f0/0x3f0 [ 32.786934] ? print_usage_bug+0xc0/0xc0 [ 32.790978] ? lock_acquire+0x1e4/0x540 [ 32.794941] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.799768] do_invalid_op+0x1b/0x20 [ 32.803464] invalid_op+0x14/0x20 [ 32.806905] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 32.811557] 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 69 d9 1b fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 43 a4 59 fa [ 32.830728] RSP: 0018:ffff8801acb3f480 EFLAGS: 00010293 [ 32.836075] RAX: ffff8801d908a380 RBX: ffff8801ad32a800 RCX: ffffffff875fd076 [ 32.843328] RDX: 0000000000000000 RSI: ffffffff875fd137 RDI: 0000000000000005 [ 32.850585] RBP: ffff8801acb3f568 R08: ffff8801d908a380 R09: ffffed0035a65510 [ 32.857835] R10: ffffed0035a65510 R11: ffff8801ad32a883 R12: 1ffff10035967e94 [ 32.865172] R13: ffff8801acb3f540 R14: ffffffff89934540 R15: ffff8801ad32a880 [ 32.872439] ? smc_unhash_sk+0x296/0x4b0 [ 32.876479] ? smc_unhash_sk+0x357/0x4b0 [ 32.880537] ? smc_rx_data_available+0x120/0x120 [ 32.885277] ? release_sock+0x1ec/0x2c0 [ 32.889235] ? __local_bh_enable_ip+0x161/0x230 [ 32.893882] ? __release_sock+0x3a0/0x3a0 [ 32.898017] ? smc_release+0x269/0x610 [ 32.901910] ? trace_hardirqs_on+0xd/0x10 [ 32.906051] ? __local_bh_enable_ip+0x161/0x230 [ 32.910708] smc_release+0x36e/0x610 [ 32.914405] __sock_release+0xd7/0x260 [ 32.918272] ? __sock_release+0x260/0x260 [ 32.922400] sock_close+0x19/0x20 [ 32.927320] __fput+0x35b/0x8b0 [ 32.930592] ? fput+0x1a0/0x1a0 [ 32.933857] ? _raw_spin_unlock_irq+0x27/0x70 [ 32.938335] ____fput+0x15/0x20 [ 32.941597] task_work_run+0x1ec/0x2a0 [ 32.945482] ? task_work_cancel+0x250/0x250 [ 32.949791] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 32.955332] ? switch_task_namespaces+0xa2/0xd0 [ 32.959991] do_exit+0x1b08/0x2750 [ 32.963543] ? mm_update_next_owner+0x9a0/0x9a0 [ 32.968205] ? lock_pin_lock+0x350/0x350 [ 32.972257] ? kasan_check_read+0x11/0x20 [ 32.976394] ? rcu_is_watching+0x8c/0x150 [ 32.980522] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 32.984921] ? check_usage_backwards+0x164/0x3d0 [ 32.989661] ? print_shortest_lock_dependencies+0x80/0x80 [ 32.995194] ? unwind_get_return_address+0x61/0xa0 [ 33.000110] ? graph_lock+0x170/0x170 [ 33.003894] ? graph_lock+0x170/0x170 [ 33.007681] ? find_held_lock+0x36/0x1c0 [ 33.011734] ? lock_downgrade+0x8f0/0x8f0 [ 33.015869] ? kasan_check_read+0x11/0x20 [ 33.020015] ? do_raw_spin_unlock+0xa7/0x2f0 [ 33.024425] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.029423] ? release_sock+0x1ec/0x2c0 [ 33.033384] ? trace_hardirqs_on+0xd/0x10 [ 33.037529] ? __local_bh_enable_ip+0x161/0x230 [ 33.042186] ? _raw_spin_unlock_bh+0x30/0x40 [ 33.046577] ? release_sock+0x1ec/0x2c0 [ 33.050533] ? __release_sock+0x3a0/0x3a0 [ 33.056059] ? __local_bh_enable_ip+0x161/0x230 [ 33.060713] ? smc_setsockopt+0x388/0x6e0 [ 33.064848] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.070372] ? __sys_setsockopt+0x257/0x3b0 [ 33.074680] do_group_exit+0x177/0x440 [ 33.078549] ? mm_fault_error+0x380/0x380 [ 33.082700] ? __ia32_sys_exit+0x50/0x50 [ 33.086750] ? do_syscall_64+0x9a/0x820 [ 33.090708] __x64_sys_exit_group+0x3e/0x50 [ 33.095016] do_syscall_64+0x1b9/0x820 [ 33.098907] ? syscall_return_slowpath+0x5e0/0x5e0 [ 33.103819] ? syscall_return_slowpath+0x31d/0x5e0 [ 33.108734] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 33.114082] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.118910] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.124080] RIP: 0033:0x43e8d8 [ 33.127248] Code: Bad RIP value. [ 33.130609] RSP: 002b:00007ffd1a1dd8f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 33.138299] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 33.145550] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 33.152802] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 33.160056] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 33.167306] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 33.175252] Dumping ftrace buffer: [ 33.178916] (ftrace buffer empty) [ 33.182617] Kernel Offset: disabled [ 33.186230] Rebooting in 86400 seconds..