[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.455494] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 16.472685] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 [ 16.615748] random: sshd: uninitialized urandom read (32 bytes read) syzkaller login: [ 17.299872] random: sshd: uninitialized urandom read (32 bytes read) [ 28.801840] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts. [ 34.279964] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 34.370704] WARNING: CPU: 0 PID: 4454 at include/net/sock.h:660 smc_unhash_sk+0x357/0x4b0 [ 34.379076] Kernel panic - not syncing: panic_on_warn set ... [ 34.379076] [ 34.386448] CPU: 0 PID: 4454 Comm: syz-executor144 Not tainted 4.18.0-rc3+ #123 [ 34.393877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.403212] Call Trace: [ 34.405785] dump_stack+0x1c9/0x2b4 [ 34.409392] ? dump_stack_print_info.cold.2+0x52/0x52 [ 34.414596] panic+0x238/0x4e7 [ 34.417803] ? add_taint.cold.5+0x16/0x16 [ 34.422131] ? __warn.cold.8+0x148/0x1ba [ 34.426180] ? __warn.cold.8+0x117/0x1ba [ 34.430235] ? smc_unhash_sk+0x357/0x4b0 [ 34.434282] __warn.cold.8+0x163/0x1ba [ 34.438160] ? smc_unhash_sk+0x357/0x4b0 [ 34.442205] report_bug+0x252/0x2d0 [ 34.445818] do_error_trap+0x1fc/0x4d0 [ 34.449685] ? math_error+0x3e0/0x3e0 [ 34.453465] ? kasan_check_write+0x14/0x20 [ 34.457682] ? do_raw_spin_lock+0xc1/0x200 [ 34.461902] ? lock_acquire+0x1e4/0x540 [ 34.465864] ? smc_unhash_sk+0xd7/0x4b0 [ 34.469841] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.474682] do_invalid_op+0x1b/0x20 [ 34.478382] invalid_op+0x14/0x20 [ 34.481834] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 34.486477] 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 a9 54 18 fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 83 2d 56 fa [ 34.505794] RSP: 0018:ffff8801c8cd7480 EFLAGS: 00010293 [ 34.511145] RAX: ffff8801ad756000 RBX: ffff8801acd05140 RCX: ffffffff8763b666 [ 34.518395] RDX: 0000000000000000 RSI: ffffffff8763b727 RDI: 0000000000000005 [ 34.525645] RBP: ffff8801c8cd7568 R08: ffff8801ad756000 R09: ffffed00359a0a38 [ 34.532897] R10: ffffed00359a0a38 R11: ffff8801acd051c3 R12: 1ffff1003919ae94 [ 34.540149] R13: ffff8801c8cd7540 R14: ffffffff899381a0 R15: ffff8801acd051c0 [ 34.547410] ? smc_unhash_sk+0x296/0x4b0 [ 34.551456] ? smc_unhash_sk+0x357/0x4b0 [ 34.555501] ? smc_rx_data_available+0x120/0x120 [ 34.560239] ? release_sock+0x1ec/0x2c0 [ 34.564201] ? do_raw_write_trylock+0x1c0/0x1c0 [ 34.568867] ? __release_sock+0x3a0/0x3a0 [ 34.573011] ? smc_release+0x2cb/0x680 [ 34.576882] ? trace_hardirqs_on+0xd/0x10 [ 34.581030] ? __local_bh_enable_ip+0x161/0x230 [ 34.585681] smc_release+0x3d1/0x680 [ 34.589378] __sock_release+0xd7/0x260 [ 34.593242] ? __sock_release+0x260/0x260 [ 34.597367] sock_close+0x19/0x20 [ 34.600803] __fput+0x355/0x8b0 [ 34.604063] ? fput+0x1a0/0x1a0 [ 34.607325] ? kasan_check_write+0x14/0x20 [ 34.611559] ? do_raw_spin_lock+0xc1/0x200 [ 34.615807] ____fput+0x15/0x20 [ 34.619095] task_work_run+0x1ec/0x2a0 [ 34.622967] ? task_work_cancel+0x250/0x250 [ 34.627272] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 34.632800] ? switch_task_namespaces+0xa2/0xd0 [ 34.637454] do_exit+0x1b08/0x2750 [ 34.640977] ? mm_update_next_owner+0x9a0/0x9a0 [ 34.645631] ? trace_hardirqs_on+0x10/0x10 [ 34.649846] ? trace_hardirqs_on+0x10/0x10 [ 34.654065] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 34.658629] ? kasan_check_write+0x14/0x20 [ 34.662845] ? do_raw_spin_lock+0xc1/0x200 [ 34.667062] ? _raw_spin_unlock+0x22/0x30 [ 34.671208] ? tcp_fastopen_reset_cipher+0x2a6/0x570 [ 34.676308] ? tcp_fastopen_ctx_destroy+0x260/0x260 [ 34.681311] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.686834] ? _copy_from_user+0xdf/0x150 [ 34.691021] ? do_tcp_setsockopt.isra.41+0x1fe/0x2620 [ 34.696211] ? release_sock+0x1ec/0x2c0 [ 34.700182] ? lock_downgrade+0x8f0/0x8f0 [ 34.704327] ? kasan_check_read+0x11/0x20 [ 34.708459] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.712856] ? release_sock+0x1ec/0x2c0 [ 34.716830] ? trace_hardirqs_on+0xd/0x10 [ 34.720981] ? __local_bh_enable_ip+0x161/0x230 [ 34.725663] ? _raw_spin_unlock_bh+0x30/0x40 [ 34.730067] ? release_sock+0x1ec/0x2c0 [ 34.734032] ? kasan_check_write+0x14/0x20 [ 34.738250] ? __release_sock+0x3a0/0x3a0 [ 34.742378] ? __local_bh_enable_ip+0x161/0x230 [ 34.747045] ? smc_setsockopt+0x388/0x6e0 [ 34.751189] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.756735] ? __sys_setsockopt+0x257/0x3b0 [ 34.761056] do_group_exit+0x177/0x440 [ 34.764923] ? mm_fault_error+0x380/0x380 [ 34.769064] ? __ia32_sys_exit+0x50/0x50 [ 34.773116] __x64_sys_exit_group+0x3e/0x50 [ 34.777428] do_syscall_64+0x1b9/0x820 [ 34.781383] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.786307] ? syscall_return_slowpath+0x31d/0x5e0 [ 34.791219] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 34.796216] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.801214] ? perf_trace_sys_enter+0xb10/0xb10 [ 34.805875] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.810701] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.815868] RIP: 0033:0x43ec88 [ 34.819035] Code: Bad RIP value. [ 34.822387] RSP: 002b:00007ffc3d938798 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 34.830085] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 34.837347] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 34.844611] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 34.851874] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 34.859130] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 34.866801] Dumping ftrace buffer: [ 34.870320] (ftrace buffer empty) [ 34.874007] Kernel Offset: disabled [ 34.877627] Rebooting in 86400 seconds..