[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.402600] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.293045] random: sshd: uninitialized urandom read (32 bytes read) [ 23.665265] random: sshd: uninitialized urandom read (32 bytes read) [ 24.423720] random: sshd: uninitialized urandom read (32 bytes read) [ 24.603865] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. [ 30.054591] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.461635] ================================================================== [ 37.469224] BUG: KASAN: use-after-free in bpf_tcp_close+0xd7f/0xf80 [ 37.475639] Read of size 8 at addr ffff8801c884cf90 by task syz-executor330/11778 [ 37.483264] [ 37.484906] CPU: 1 PID: 11778 Comm: syz-executor330 Not tainted 4.17.0-rc4+ #18 [ 37.492783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.502138] Call Trace: [ 37.504741] dump_stack+0x1b9/0x294 [ 37.508387] ? dump_stack_print_info.cold.2+0x52/0x52 [ 37.513592] ? printk+0x9e/0xba [ 37.516884] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 37.521654] ? kasan_check_write+0x14/0x20 [ 37.525899] print_address_description+0x6c/0x20b [ 37.530755] ? bpf_tcp_close+0xd7f/0xf80 [ 37.534829] kasan_report.cold.7+0x242/0x2fe [ 37.539247] __asan_report_load8_noabort+0x14/0x20 [ 37.544184] bpf_tcp_close+0xd7f/0xf80 [ 37.548076] ? tcp_check_oom+0x520/0x520 [ 37.552145] ? lock_downgrade+0x8e0/0x8e0 [ 37.556316] ? sock_hash_free+0x6e0/0x6e0 [ 37.560474] ? kasan_check_read+0x11/0x20 [ 37.564629] ? rcu_is_watching+0x85/0x140 [ 37.568789] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 37.573989] ? kasan_check_read+0x11/0x20 [ 37.578143] ? rcu_is_watching+0x85/0x140 [ 37.582301] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.587850] ? ipv6_sock_ac_close+0x34e/0x480 [ 37.592359] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.597900] ? ipv6_sock_mc_close+0x161/0x1c0 [ 37.602404] ? ip_mc_drop_socket+0x20f/0x270 [ 37.606824] inet_release+0x104/0x1f0 [ 37.610638] inet6_release+0x50/0x70 [ 37.614362] sock_release+0x96/0x1b0 [ 37.618085] ? sock_alloc_file+0x4e0/0x4e0 [ 37.622331] sock_close+0x16/0x20 [ 37.625788] __fput+0x34d/0x890 [ 37.629077] ? fput+0x1a0/0x1a0 [ 37.632376] ? check_same_owner+0x320/0x320 [ 37.636703] ? _raw_spin_unlock_irq+0x27/0x70 [ 37.641212] ____fput+0x15/0x20 [ 37.644497] task_work_run+0x1e4/0x290 [ 37.648402] ? task_work_cancel+0x240/0x240 [ 37.652736] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 37.658283] ? switch_task_namespaces+0xa2/0xd0 [ 37.662960] do_exit+0x1aee/0x2730 [ 37.666507] ? plist_add+0x770/0x770 [ 37.670238] ? mm_update_next_owner+0x980/0x980 [ 37.674917] ? print_usage_bug+0xc0/0xc0 [ 37.678982] ? graph_lock+0x170/0x170 [ 37.682789] ? do_raw_spin_unlock+0x9e/0x2e0 [ 37.687210] ? rcu_note_context_switch+0x710/0x710 [ 37.692142] ? lock_acquire+0x1dc/0x520 [ 37.696137] ? __might_sleep+0x95/0x190 [ 37.700124] ? __lock_acquire+0x7f5/0x5140 [ 37.704376] ? debug_check_no_locks_freed+0x310/0x310 [ 37.709585] ? do_raw_spin_unlock+0x9e/0x2e0 [ 37.714000] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 37.718598] ? kasan_check_write+0x14/0x20 [ 37.722849] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.728053] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 37.733609] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 37.738723] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.744275] ? futex_wait+0x5c1/0x9f0 [ 37.748093] ? futex_wait_setup+0x400/0x400 [ 37.752448] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.757653] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 37.763199] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 37.768323] ? futex_wake+0x2f6/0x750 [ 37.772126] ? graph_lock+0x170/0x170 [ 37.775942] ? memset+0x31/0x40 [ 37.779231] ? find_held_lock+0x36/0x1c0 [ 37.783314] ? lock_downgrade+0x8e0/0x8e0 [ 37.787483] do_group_exit+0x16f/0x430 [ 37.791396] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 37.795990] ? __ia32_sys_exit+0x50/0x50 [ 37.800077] ? _raw_spin_unlock_irq+0x27/0x70 [ 37.804591] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.809631] get_signal+0x886/0x1960 [ 37.813368] ? ptrace_notify+0x130/0x130 [ 37.817445] ? alloc_file+0x44/0x3e0 [ 37.821181] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.826729] ? anon_inode_getfile+0x380/0x4c0 [ 37.831245] ? graph_lock+0x170/0x170 [ 37.835064] ? reverse_path_check_proc.cold.21+0x1f/0x1f [ 37.840539] ? __fget_light+0x2ef/0x430 [ 37.844536] ? fget_raw+0x20/0x20 [ 37.848004] do_signal+0x98/0x2040 [ 37.851581] ? setup_sigcontext+0x7d0/0x7d0 [ 37.855926] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.861479] ? bpf_obj_get_info_by_fd+0x15e/0xb10 [ 37.866345] ? __check_object_size+0x95/0x5d9 [ 37.870862] ? bpf_prog_get_info_by_fd.isra.18+0x1600/0x1600 [ 37.876692] ? exit_to_usermode_loop+0x87/0x310 [ 37.881392] exit_to_usermode_loop+0x28a/0x310 [ 37.885999] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 37.890865] ? do_syscall_64+0x92/0x800 [ 37.894869] do_syscall_64+0x6ac/0x800 [ 37.898781] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 37.903644] ? syscall_return_slowpath+0x5c0/0x5c0 [ 37.908594] ? syscall_return_slowpath+0x30f/0x5c0 [ 37.913553] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 37.918939] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.923804] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.929002] RIP: 0033:0x445ed9 [ 37.932194] RSP: 002b:00007f0078c0adb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 37.939915] RAX: fffffffffffffe00 RBX: 00000000006dbc24 RCX: 0000000000445ed9 [ 37.947194] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc24 [ 37.954475] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 37.961759] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 37.969041] R13: 00007ffcd147dbef R14: 00007f0078c0b9c0 R15: 0000000000000007 [ 37.976329] [ 37.978054] Allocated by task 11787: [ 37.981793] save_stack+0x43/0xd0 [ 37.985269] kasan_kmalloc+0xc4/0xe0 [ 37.989003] __kmalloc_node+0x47/0x70 [ 37.992823] sock_hash_ctx_update_elem.isra.23+0xa57/0x1560 [ 37.998562] sock_hash_update_elem+0x14f/0x2d0 [ 38.003161] map_update_elem+0x5c4/0xc90 [ 38.007238] __x64_sys_bpf+0x32a/0x4f0 [ 38.011140] do_syscall_64+0x1b1/0x800 [ 38.015041] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.020226] [ 38.021851] Freed by task 8998: [ 38.025145] save_stack+0x43/0xd0 [ 38.028615] __kasan_slab_free+0x11a/0x170 [ 38.032860] kasan_slab_free+0xe/0x10 [ 38.036677] kfree+0xd9/0x260 [ 38.039794] sock_hash_free+0x24e/0x6e0 [ 38.043780] bpf_map_free_deferred+0xba/0xf0 [ 38.048206] process_one_work+0xc1e/0x1b50 [ 38.052454] worker_thread+0x1cc/0x1440 [ 38.056439] kthread+0x345/0x410 [ 38.059822] ret_from_fork+0x3a/0x50 [ 38.063529] [ 38.065172] The buggy address belongs to the object at ffff8801c884cf80 [ 38.065172] which belongs to the cache kmalloc-64 of size 64 [ 38.077667] The buggy address is located 16 bytes inside of [ 38.077667] 64-byte region [ffff8801c884cf80, ffff8801c884cfc0) [ 38.089378] The buggy address belongs to the page: [ 38.094319] page:ffffea0007221300 count:1 mapcount:0 mapping:ffff8801c884c000 index:0x0 [ 38.102475] flags: 0x2fffc0000000100(slab) [ 38.106819] raw: 02fffc0000000100 ffff8801c884c000 0000000000000000 0000000100000020 [ 38.114711] raw: ffffea00072e08e0 ffffea0006e99660 ffff8801da800340 0000000000000000 [ 38.122591] page dumped because: kasan: bad access detected [ 38.128304] [ 38.129958] Memory state around the buggy address: [ 38.134892] ffff8801c884ce80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.142253] ffff8801c884cf00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 38.149618] >ffff8801c884cf80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.156976] ^ executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.160867] ffff8801c884d000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 38.168228] ffff8801c884d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.175587] ================================================================== [ 38.182945] Disabling lock debugging due to kernel taint [ 38.188471] Kernel panic - not syncing: panic_on_warn set ... [ 38.188471] [ 38.196381] CPU: 1 PID: 11778 Comm: syz-executor330 Tainted: G B 4.17.0-rc4+ #18 [ 38.205299] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.214649] Call Trace: [ 38.217248] dump_stack+0x1b9/0x294 [ 38.220885] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.226207] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 38.230972] ? bpf_tcp_close+0xcf0/0xf80 [ 38.235039] panic+0x22f/0x4de [ 38.238231] ? add_taint.cold.5+0x16/0x16 [ 38.242386] ? do_raw_spin_unlock+0x9e/0x2e0 [ 38.246804] ? do_raw_spin_unlock+0x9e/0x2e0 [ 38.251221] ? bpf_tcp_close+0xd7f/0xf80 [ 38.255297] kasan_end_report+0x47/0x4f [ 38.259277] kasan_report.cold.7+0x76/0x2fe [ 38.263605] __asan_report_load8_noabort+0x14/0x20 [ 38.268557] bpf_tcp_close+0xd7f/0xf80 [ 38.272449] ? tcp_check_oom+0x520/0x520 [ 38.276526] ? lock_downgrade+0x8e0/0x8e0 [ 38.280685] ? sock_hash_free+0x6e0/0x6e0 [ 38.284840] ? kasan_check_read+0x11/0x20 [ 38.288998] ? rcu_is_watching+0x85/0x140 [ 38.293178] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 38.298378] ? kasan_check_read+0x11/0x20 [ 38.302551] ? rcu_is_watching+0x85/0x140 [ 38.306727] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.312270] ? ipv6_sock_ac_close+0x34e/0x480 [ 38.316784] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.322356] ? ipv6_sock_mc_close+0x161/0x1c0 [ 38.326856] ? ip_mc_drop_socket+0x20f/0x270 [ 38.331272] inet_release+0x104/0x1f0 [ 38.335080] inet6_release+0x50/0x70 [ 38.338799] sock_release+0x96/0x1b0 [ 38.342533] ? sock_alloc_file+0x4e0/0x4e0 [ 38.346773] sock_close+0x16/0x20 [ 38.350232] __fput+0x34d/0x890 [ 38.353531] ? fput+0x1a0/0x1a0 [ 38.356908] ? check_same_owner+0x320/0x320 [ 38.361236] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.365741] ____fput+0x15/0x20 [ 38.369022] task_work_run+0x1e4/0x290 [ 38.372915] ? task_work_cancel+0x240/0x240 [ 38.377247] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 38.382792] ? switch_task_namespaces+0xa2/0xd0 [ 38.387465] do_exit+0x1aee/0x2730 [ 38.391009] ? plist_add+0x770/0x770 [ 38.394729] ? mm_update_next_owner+0x980/0x980 [ 38.399401] ? print_usage_bug+0xc0/0xc0 [ 38.403462] ? graph_lock+0x170/0x170 [ 38.407268] ? do_raw_spin_unlock+0x9e/0x2e0 [ 38.411680] ? rcu_note_context_switch+0x710/0x710 [ 38.416609] ? lock_acquire+0x1dc/0x520 [ 38.420586] ? __might_sleep+0x95/0x190 [ 38.424567] ? __lock_acquire+0x7f5/0x5140 [ 38.428813] ? debug_check_no_locks_freed+0x310/0x310 [ 38.434005] ? do_raw_spin_unlock+0x9e/0x2e0 [ 38.438417] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 38.443008] ? kasan_check_write+0x14/0x20 [ 38.447250] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 38.452450] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 38.457995] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 38.463102] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.468643] ? futex_wait+0x5c1/0x9f0 [ 38.472451] ? futex_wait_setup+0x400/0x400 [ 38.476785] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 38.481984] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 38.487538] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 38.492650] ? futex_wake+0x2f6/0x750 [ 38.496467] ? graph_lock+0x170/0x170 [ 38.500295] ? memset+0x31/0x40 [ 38.503842] ? find_held_lock+0x36/0x1c0 [ 38.507912] ? lock_downgrade+0x8e0/0x8e0 [ 38.512069] do_group_exit+0x16f/0x430 [ 38.515967] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 38.520554] ? __ia32_sys_exit+0x50/0x50 [ 38.524622] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.529124] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.534147] get_signal+0x886/0x1960 [ 38.537865] ? ptrace_notify+0x130/0x130 [ 38.541933] ? alloc_file+0x44/0x3e0 [ 38.545652] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.551194] ? anon_inode_getfile+0x380/0x4c0 [ 38.555691] ? graph_lock+0x170/0x170 [ 38.559509] ? reverse_path_check_proc.cold.21+0x1f/0x1f [ 38.564964] ? __fget_light+0x2ef/0x430 [ 38.568946] ? fget_raw+0x20/0x20 [ 38.572407] do_signal+0x98/0x2040 [ 38.575956] ? setup_sigcontext+0x7d0/0x7d0 [ 38.580289] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.585856] ? bpf_obj_get_info_by_fd+0x15e/0xb10 [ 38.590708] ? __check_object_size+0x95/0x5d9 [ 38.595215] ? bpf_prog_get_info_by_fd.isra.18+0x1600/0x1600 [ 38.601027] ? exit_to_usermode_loop+0x87/0x310 [ 38.605707] exit_to_usermode_loop+0x28a/0x310 [ 38.610297] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 38.615149] ? do_syscall_64+0x92/0x800 [ 38.619150] do_syscall_64+0x6ac/0x800 [ 38.623046] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 38.627891] ? syscall_return_slowpath+0x5c0/0x5c0 [ 38.632829] ? syscall_return_slowpath+0x30f/0x5c0 [ 38.637770] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 38.643139] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.647990] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.653177] RIP: 0033:0x445ed9 [ 38.656363] RSP: 002b:00007f0078c0adb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 38.664071] RAX: fffffffffffffe00 RBX: 00000000006dbc24 RCX: 0000000000445ed9 [ 38.671342] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc24 [ 38.678611] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 38.685882] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 38.693152] R13: 00007ffcd147dbef R14: 00007f0078c0b9c0 R15: 0000000000000007 [ 38.700868] Dumping ftrace buffer: [ 38.704391] (ftrace buffer empty) [ 38.708095] Kernel Offset: disabled [ 38.711700] Rebooting in 86400 seconds..