[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.467364] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.599420] random: sshd: uninitialized urandom read (32 bytes read) [ 23.886063] random: sshd: uninitialized urandom read (32 bytes read) [ 24.717479] random: sshd: uninitialized urandom read (32 bytes read) [ 225.457184] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.34' (ECDSA) to the list of known hosts. [ 231.022163] random: sshd: uninitialized urandom read (32 bytes read) net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 231.108683] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 246.824263] ================================================================== [ 246.831715] BUG: KASAN: use-after-free in do_raw_spin_lock+0x1c0/0x200 [ 246.838373] Read of size 4 at addr ffff8801c4723644 by task syz-executor865/9746 [ 246.845888] [ 246.847499] CPU: 0 PID: 9746 Comm: syz-executor865 Not tainted 4.18.0-rc5+ #68 [ 246.854845] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 246.864188] Call Trace: [ 246.866760] dump_stack+0x1c9/0x2b4 [ 246.870371] ? dump_stack_print_info.cold.2+0x52/0x52 [ 246.875543] ? printk+0xa7/0xcf [ 246.878804] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 246.883554] ? do_raw_spin_lock+0x1c0/0x200 [ 246.887862] print_address_description+0x6c/0x20b [ 246.892694] ? do_raw_spin_lock+0x1c0/0x200 [ 246.897001] kasan_report.cold.7+0x242/0x2fe [ 246.901413] __asan_report_load4_noabort+0x14/0x20 [ 246.906331] do_raw_spin_lock+0x1c0/0x200 [ 246.910462] _raw_spin_lock_bh+0x39/0x40 [ 246.914512] ? bpf_cgroup_storage_release+0x2c/0x110 [ 246.919598] bpf_cgroup_storage_release+0x2c/0x110 [ 246.924507] free_used_maps+0x81/0x200 [ 246.928387] ? bpf_prog_kallsyms_del_subprogs+0x124/0x180 [ 246.933905] bpf_prog_load+0x17ba/0x1c90 [ 246.937946] ? bpf_prog_new_fd+0x60/0x60 [ 246.941989] ? lock_acquire+0x1e4/0x540 [ 246.945951] ? __might_fault+0x12b/0x1e0 [ 246.949995] ? lock_downgrade+0x8f0/0x8f0 [ 246.954129] ? lock_downgrade+0x8f0/0x8f0 [ 246.958261] ? check_same_owner+0x340/0x340 [ 246.962565] ? __check_object_size+0x9d/0x5f2 [ 246.967055] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 246.972575] __x64_sys_bpf+0x36c/0x510 [ 246.976442] ? bpf_prog_get+0x20/0x20 [ 246.980226] ? kasan_check_read+0x11/0x20 [ 246.984368] ? do_page_fault+0xf6/0x8c0 [ 246.988327] do_syscall_64+0x1b9/0x820 [ 246.992197] ? finish_task_switch+0x1d3/0x870 [ 246.996671] ? syscall_return_slowpath+0x5e0/0x5e0 [ 247.001581] ? syscall_return_slowpath+0x31d/0x5e0 [ 247.006490] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 247.011488] ? prepare_exit_to_usermode+0x291/0x3b0 [ 247.016487] ? perf_trace_sys_enter+0xb10/0xb10 [ 247.021137] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 247.025963] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 247.031130] RIP: 0033:0x4490d9 [ 247.034295] Code: e8 8c bb 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 4b 00 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 247.053424] RSP: 002b:00007f6096d1ace8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 247.061111] RAX: ffffffffffffffda RBX: 00000000006e5a08 RCX: 00000000004490d9 [ 247.068363] RDX: 0000000000000048 RSI: 000000002001a840 RDI: 0000000000000005 [ 247.075613] RBP: 00000000006e5a00 R08: 0000000000000000 R09: 0000000000000000 [ 247.082864] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e5a0c [ 247.090119] R13: 00007fffd579e24f R14: 00007f6096d1b9c0 R15: 0000000000000019 [ 247.097395] [ 247.099010] Allocated by task 9746: [ 247.102642] save_stack+0x43/0xd0 [ 247.106075] kasan_kmalloc+0xc4/0xe0 [ 247.109778] kmem_cache_alloc_node_trace+0x150/0x770 [ 247.114870] cgroup_storage_map_alloc+0x26d/0x400 [ 247.119703] map_create+0x37f/0xe20 [ 247.123312] __x64_sys_bpf+0x303/0x510 [ 247.127182] do_syscall_64+0x1b9/0x820 [ 247.131061] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 247.136223] [ 247.137830] Freed by task 19: [ 247.140915] save_stack+0x43/0xd0 [ 247.144349] __kasan_slab_free+0x11a/0x170 [ 247.148561] kasan_slab_free+0xe/0x10 [ 247.152341] kfree+0xd9/0x260 [ 247.155426] cgroup_storage_map_free+0x16e/0x210 [ 247.160160] bpf_map_free_deferred+0xba/0xf0 [ 247.164550] process_one_work+0xc73/0x1ba0 [ 247.168762] worker_thread+0x189/0x13c0 [ 247.172714] kthread+0x345/0x410 [ 247.176064] ret_from_fork+0x3a/0x50 [ 247.179750] [ 247.181355] The buggy address belongs to the object at ffff8801c4723540 [ 247.181355] which belongs to the cache kmalloc-512 of size 512 [ 247.193989] The buggy address is located 260 bytes inside of [ 247.193989] 512-byte region [ffff8801c4723540, ffff8801c4723740) [ 247.205844] The buggy address belongs to the page: [ 247.210753] page:ffffea000711c8c0 count:1 mapcount:0 mapping:ffff8801dac00940 index:0xffff8801c4723a40 [ 247.220176] flags: 0x2fffc0000000100(slab) [ 247.224394] raw: 02fffc0000000100 ffffea0007299088 ffffea00072247c8 ffff8801dac00940 [ 247.232254] raw: ffff8801c4723a40 ffff8801c4723040 0000000100000004 0000000000000000 [ 247.240108] page dumped because: kasan: bad access detected [ 247.245803] [ 247.247409] Memory state around the buggy address: [ 247.252322] ffff8801c4723500: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 247.259661] ffff8801c4723580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 247.267000] >ffff8801c4723600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 247.274343] ^ [ 247.279769] ffff8801c4723680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 247.287107] ffff8801c4723700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 247.294441] ================================================================== [ 247.301835] Kernel panic - not syncing: panic_on_warn set ... [ 247.301835] [ 247.309199] CPU: 0 PID: 9746 Comm: syz-executor865 Tainted: G B 4.18.0-rc5+ #68 [ 247.317923] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 247.327253] Call Trace: [ 247.329824] dump_stack+0x1c9/0x2b4 [ 247.333433] ? dump_stack_print_info.cold.2+0x52/0x52 [ 247.338607] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 247.343346] panic+0x238/0x4e7 [ 247.346521] ? add_taint.cold.5+0x16/0x16 [ 247.350653] ? do_raw_spin_unlock+0xa7/0x2f0 [ 247.355049] ? do_raw_spin_lock+0x1c0/0x200 [ 247.359351] kasan_end_report+0x47/0x4f [ 247.363319] kasan_report.cold.7+0x76/0x2fe [ 247.367623] __asan_report_load4_noabort+0x14/0x20 [ 247.372530] do_raw_spin_lock+0x1c0/0x200 [ 247.376663] _raw_spin_lock_bh+0x39/0x40 [ 247.380705] ? bpf_cgroup_storage_release+0x2c/0x110 [ 247.385787] bpf_cgroup_storage_release+0x2c/0x110 [ 247.390700] free_used_maps+0x81/0x200 [ 247.394570] ? bpf_prog_kallsyms_del_subprogs+0x124/0x180 [ 247.400091] bpf_prog_load+0x17ba/0x1c90 [ 247.404142] ? bpf_prog_new_fd+0x60/0x60 [ 247.408188] ? lock_acquire+0x1e4/0x540 [ 247.412153] ? __might_fault+0x12b/0x1e0 [ 247.416201] ? lock_downgrade+0x8f0/0x8f0 [ 247.420332] ? lock_downgrade+0x8f0/0x8f0 [ 247.424460] ? check_same_owner+0x340/0x340 [ 247.428764] ? __check_object_size+0x9d/0x5f2 [ 247.433244] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 247.438775] __x64_sys_bpf+0x36c/0x510 [ 247.442648] ? bpf_prog_get+0x20/0x20 [ 247.446456] ? kasan_check_read+0x11/0x20 [ 247.450587] ? do_page_fault+0xf6/0x8c0 [ 247.454554] do_syscall_64+0x1b9/0x820 [ 247.458422] ? finish_task_switch+0x1d3/0x870 [ 247.462897] ? syscall_return_slowpath+0x5e0/0x5e0 [ 247.467808] ? syscall_return_slowpath+0x31d/0x5e0 [ 247.472720] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 247.477717] ? prepare_exit_to_usermode+0x291/0x3b0 [ 247.482721] ? perf_trace_sys_enter+0xb10/0xb10 [ 247.487377] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 247.492216] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 247.497387] RIP: 0033:0x4490d9 [ 247.500553] Code: e8 8c bb 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 4b 00 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 247.519678] RSP: 002b:00007f6096d1ace8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 247.527369] RAX: ffffffffffffffda RBX: 00000000006e5a08 RCX: 00000000004490d9 [ 247.534618] RDX: 0000000000000048 RSI: 000000002001a840 RDI: 0000000000000005 [ 247.541868] RBP: 00000000006e5a00 R08: 0000000000000000 R09: 0000000000000000 [ 247.549118] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e5a0c [ 247.556369] R13: 00007fffd579e24f R14: 00007f6096d1b9c0 R15: 0000000000000019 [ 247.564080] Dumping ftrace buffer: [ 247.567613] (ftrace buffer empty) [ 247.571322] Kernel Offset: disabled [ 247.574925] Rebooting in 86400 seconds..