[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.516204] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.480426] random: sshd: uninitialized urandom read (32 bytes read) [ 19.804805] random: sshd: uninitialized urandom read (32 bytes read) [ 20.506651] random: sshd: uninitialized urandom read (32 bytes read) [ 20.641530] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.7' (ECDSA) to the list of known hosts. [ 26.098952] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.183005] WARNING: CPU: 1 PID: 4459 at include/net/sock.h:660 smc_unhash_sk+0x357/0x4b0 [ 26.191352] Kernel panic - not syncing: panic_on_warn set ... [ 26.191352] [ 26.198709] CPU: 1 PID: 4459 Comm: syz-executor163 Not tainted 4.18.0-rc3+ #128 [ 26.206139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.215482] Call Trace: [ 26.218068] dump_stack+0x1c9/0x2b4 [ 26.221680] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.226859] panic+0x238/0x4e7 [ 26.230035] ? add_taint.cold.5+0x16/0x16 [ 26.234168] ? __warn.cold.8+0x148/0x1ba [ 26.238218] ? __warn.cold.8+0x117/0x1ba [ 26.242264] ? smc_unhash_sk+0x357/0x4b0 [ 26.246307] __warn.cold.8+0x163/0x1ba [ 26.250183] ? smc_unhash_sk+0x357/0x4b0 [ 26.254235] report_bug+0x252/0x2d0 [ 26.257846] do_error_trap+0x1fc/0x4d0 [ 26.261713] ? math_error+0x3e0/0x3e0 [ 26.265494] ? kasan_check_write+0x14/0x20 [ 26.269715] ? do_raw_spin_lock+0xc1/0x200 [ 26.273940] ? lock_acquire+0x1e4/0x540 [ 26.277898] ? smc_unhash_sk+0xd7/0x4b0 [ 26.281867] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.286708] do_invalid_op+0x1b/0x20 [ 26.290410] invalid_op+0x14/0x20 [ 26.293856] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 26.298504] 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 c9 1e 18 fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 a3 f7 55 fa [ 26.317635] RSP: 0018:ffff8801ac94f480 EFLAGS: 00010293 [ 26.322980] RAX: ffff8801ad1cc2c0 RBX: ffff8801ac961140 RCX: ffffffff8763ec46 [ 26.330228] RDX: 0000000000000000 RSI: ffffffff8763ed07 RDI: 0000000000000005 [ 26.337488] RBP: ffff8801ac94f568 R08: ffff8801ad1cc2c0 R09: ffffed003592c238 [ 26.344738] R10: ffffed003592c238 R11: ffff8801ac9611c3 R12: 1ffff10035929e94 [ 26.351988] R13: ffff8801ac94f540 R14: ffffffff89938760 R15: ffff8801ac9611c0 [ 26.359271] ? smc_unhash_sk+0x296/0x4b0 [ 26.363312] ? smc_unhash_sk+0x357/0x4b0 [ 26.367360] ? smc_rx_data_available+0x120/0x120 [ 26.372097] ? release_sock+0x1ec/0x2c0 [ 26.376052] ? do_raw_write_trylock+0x1c0/0x1c0 [ 26.380701] ? __release_sock+0x3a0/0x3a0 [ 26.384826] ? smc_release+0x2cb/0x680 [ 26.388698] ? trace_hardirqs_on+0xd/0x10 [ 26.392825] ? __local_bh_enable_ip+0x161/0x230 [ 26.397482] smc_release+0x3d1/0x680 [ 26.401187] __sock_release+0xd7/0x260 [ 26.405054] ? __sock_release+0x260/0x260 [ 26.409181] sock_close+0x19/0x20 [ 26.412620] __fput+0x355/0x8b0 [ 26.415881] ? fput+0x1a0/0x1a0 [ 26.419146] ? kasan_check_write+0x14/0x20 [ 26.423360] ? do_raw_spin_lock+0xc1/0x200 [ 26.427592] ____fput+0x15/0x20 [ 26.430857] task_work_run+0x1ec/0x2a0 [ 26.434722] ? task_work_cancel+0x250/0x250 [ 26.439031] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.444558] ? switch_task_namespaces+0xa2/0xd0 [ 26.449208] do_exit+0x1b08/0x2750 [ 26.452728] ? mm_update_next_owner+0x9a0/0x9a0 [ 26.457390] ? trace_hardirqs_on+0x10/0x10 [ 26.461609] ? trace_hardirqs_on+0x10/0x10 [ 26.465835] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 26.470404] ? kasan_check_write+0x14/0x20 [ 26.474630] ? do_raw_spin_lock+0xc1/0x200 [ 26.478861] ? _raw_spin_unlock+0x22/0x30 [ 26.483015] ? tcp_fastopen_reset_cipher+0x2a6/0x570 [ 26.488119] ? tcp_fastopen_ctx_destroy+0x260/0x260 [ 26.493138] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 26.498668] ? _copy_from_user+0xdf/0x150 [ 26.502801] ? do_tcp_setsockopt.isra.41+0x1fe/0x2620 [ 26.508189] ? release_sock+0x1ec/0x2c0 [ 26.512154] ? lock_downgrade+0x8f0/0x8f0 [ 26.516289] ? kasan_check_read+0x11/0x20 [ 26.520422] ? do_raw_spin_unlock+0xa7/0x2f0 [ 26.524819] ? release_sock+0x1ec/0x2c0 [ 26.528781] ? trace_hardirqs_on+0xd/0x10 [ 26.532916] ? __local_bh_enable_ip+0x161/0x230 [ 26.537588] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.541994] ? release_sock+0x1ec/0x2c0 [ 26.545970] ? kasan_check_write+0x14/0x20 [ 26.550228] ? __release_sock+0x3a0/0x3a0 [ 26.554371] ? __local_bh_enable_ip+0x161/0x230 [ 26.559045] ? smc_setsockopt+0x388/0x6e0 [ 26.563193] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.568726] ? __sys_setsockopt+0x257/0x3b0 [ 26.573037] do_group_exit+0x177/0x440 [ 26.576928] ? mm_fault_error+0x380/0x380 [ 26.581062] ? __ia32_sys_exit+0x50/0x50 [ 26.585121] __x64_sys_exit_group+0x3e/0x50 [ 26.589432] do_syscall_64+0x1b9/0x820 [ 26.593301] ? syscall_return_slowpath+0x5e0/0x5e0 [ 26.598224] ? syscall_return_slowpath+0x31d/0x5e0 [ 26.603141] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 26.608251] ? prepare_exit_to_usermode+0x291/0x3b0 [ 26.613279] ? perf_trace_sys_enter+0xb10/0xb10 [ 26.617939] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.622773] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.627948] RIP: 0033:0x43ec88 [ 26.631117] Code: Bad RIP value. [ 26.634479] RSP: 002b:00007ffdd9f49238 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.642170] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 26.649421] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.656681] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.663940] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 26.671200] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 26.679011] Dumping ftrace buffer: [ 26.682554] (ftrace buffer empty) [ 26.686252] Kernel Offset: disabled [ 26.689870] Rebooting in 86400 seconds..