[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.782280] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.370000] random: sshd: uninitialized urandom read (32 bytes read) [ 19.732082] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.573694] random: sshd: uninitialized urandom read (32 bytes read) [ 20.735252] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. [ 26.273314] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.364052] WARNING: CPU: 0 PID: 4522 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 26.372450] Kernel panic - not syncing: panic_on_warn set ... [ 26.372450] [ 26.379794] CPU: 0 PID: 4522 Comm: syz-executor348 Not tainted 4.18.0-rc1+ #109 [ 26.387229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.396560] Call Trace: [ 26.399129] dump_stack+0x1c9/0x2b4 [ 26.402736] ? dump_stack_print_info.cold.2+0x52/0x52 [ 26.407912] panic+0x238/0x4e7 [ 26.411084] ? add_taint.cold.5+0x16/0x16 [ 26.415213] ? __warn.cold.8+0x148/0x1ba [ 26.419252] ? __warn.cold.8+0x117/0x1ba [ 26.423300] ? smc_unhash_sk+0x357/0x4b0 [ 26.427342] __warn.cold.8+0x163/0x1ba [ 26.431211] ? smc_unhash_sk+0x357/0x4b0 [ 26.435252] report_bug+0x252/0x2d0 [ 26.438861] do_error_trap+0x1fc/0x4d0 [ 26.442729] ? math_error+0x3f0/0x3f0 [ 26.446512] ? print_usage_bug+0xc0/0xc0 [ 26.450555] ? lock_acquire+0x1e4/0x540 [ 26.454512] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.459338] do_invalid_op+0x1b/0x20 [ 26.463040] invalid_op+0x14/0x20 [ 26.466474] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 26.471118] 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 [ 26.490287] RSP: 0018:ffff8801b45b7480 EFLAGS: 00010293 [ 26.495632] RAX: ffff8801ae34a6c0 RBX: ffff8801d9706800 RCX: ffffffff875fd076 [ 26.502925] RDX: 0000000000000000 RSI: ffffffff875fd137 RDI: 0000000000000005 [ 26.510183] RBP: ffff8801b45b7568 R08: ffff8801ae34a6c0 R09: ffffed003b2e0d10 [ 26.517432] R10: ffffed003b2e0d10 R11: ffff8801d9706883 R12: 1ffff100368b6e94 [ 26.524681] R13: ffff8801b45b7540 R14: ffffffff89934600 R15: ffff8801d9706880 [ 26.531946] ? smc_unhash_sk+0x296/0x4b0 [ 26.536000] ? smc_unhash_sk+0x357/0x4b0 [ 26.540066] ? smc_rx_data_available+0x120/0x120 [ 26.544804] ? release_sock+0x1ec/0x2c0 [ 26.548758] ? __local_bh_enable_ip+0x161/0x230 [ 26.553408] ? __release_sock+0x3a0/0x3a0 [ 26.557536] ? smc_release+0x269/0x610 [ 26.561417] ? trace_hardirqs_on+0xd/0x10 [ 26.565544] ? __local_bh_enable_ip+0x161/0x230 [ 26.570204] smc_release+0x36e/0x610 [ 26.573901] __sock_release+0xd7/0x260 [ 26.577768] ? __sock_release+0x260/0x260 [ 26.581907] sock_close+0x19/0x20 [ 26.585356] __fput+0x35b/0x8b0 [ 26.588618] ? fput+0x1a0/0x1a0 [ 26.591879] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.596358] ____fput+0x15/0x20 [ 26.599617] task_work_run+0x1ec/0x2a0 [ 26.603486] ? task_work_cancel+0x250/0x250 [ 26.607788] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 26.613308] ? switch_task_namespaces+0xa2/0xd0 [ 26.617965] do_exit+0x1b08/0x2750 [ 26.621489] ? mm_update_next_owner+0x9a0/0x9a0 [ 26.626141] ? lock_pin_lock+0x350/0x350 [ 26.630186] ? kasan_check_read+0x11/0x20 [ 26.634313] ? rcu_is_watching+0x8c/0x150 [ 26.638451] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 26.642845] ? check_usage_backwards+0x164/0x3d0 [ 26.647580] ? print_shortest_lock_dependencies+0x80/0x80 [ 26.653107] ? unwind_get_return_address+0x61/0xa0 [ 26.658024] ? graph_lock+0x170/0x170 [ 26.661810] ? graph_lock+0x170/0x170 [ 26.665596] ? find_held_lock+0x36/0x1c0 [ 26.669644] ? lock_downgrade+0x8f0/0x8f0 [ 26.673784] ? kasan_check_read+0x11/0x20 [ 26.677914] ? do_raw_spin_unlock+0xa7/0x2f0 [ 26.682308] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.687313] ? release_sock+0x1ec/0x2c0 [ 26.691269] ? trace_hardirqs_on+0xd/0x10 [ 26.695396] ? __local_bh_enable_ip+0x161/0x230 [ 26.700057] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.704449] ? release_sock+0x1ec/0x2c0 [ 26.708401] ? __release_sock+0x3a0/0x3a0 [ 26.712529] ? __local_bh_enable_ip+0x161/0x230 [ 26.717178] ? smc_setsockopt+0x388/0x6e0 [ 26.721310] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.726838] ? __sys_setsockopt+0x257/0x3b0 [ 26.731144] do_group_exit+0x177/0x440 [ 26.735015] ? mm_fault_error+0x380/0x380 [ 26.739150] ? __ia32_sys_exit+0x50/0x50 [ 26.743192] ? do_syscall_64+0x9a/0x820 [ 26.747147] __x64_sys_exit_group+0x3e/0x50 [ 26.751446] do_syscall_64+0x1b9/0x820 [ 26.755312] ? syscall_return_slowpath+0x5e0/0x5e0 [ 26.760224] ? syscall_return_slowpath+0x31d/0x5e0 [ 26.765136] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 26.770492] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.775321] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.780490] RIP: 0033:0x43e8d8 [ 26.783657] Code: Bad RIP value. [ 26.787014] RSP: 002b:00007ffdb43303b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.794713] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 26.801960] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.809219] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.816470] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 26.823718] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 26.831540] Dumping ftrace buffer: [ 26.835168] (ftrace buffer empty) [ 26.838856] Kernel Offset: disabled [ 26.842462] Rebooting in 86400 seconds..