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BUG: KASAN: use-after-free in lockdep_register_key+0x356/0x3e0 kernel/locking/lockdep.c:1182
Read of size 8 at addr ffff88805bdec2d8 by task syz-executor.1/9925

CPU: 1 PID: 9925 Comm: syz-executor.1 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xae/0x4c8 mm/kasan/report.c:385
 __kasan_report mm/kasan/report.c:545 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562
 lockdep_register_key+0x356/0x3e0 kernel/locking/lockdep.c:1182
 htab_init_buckets kernel/bpf/hashtab.c:144 [inline]
 htab_map_alloc+0x6c5/0x14a0 kernel/bpf/hashtab.c:521
 find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
 map_create kernel/bpf/syscall.c:825 [inline]
 __do_sys_bpf+0xa80/0x5180 kernel/bpf/syscall.c:4381
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45deb9
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3d2279ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000001a00 RCX: 000000000045deb9
RDX: 000000000000002c RSI: 0000000020000340 RDI: 0000000000000000
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffdfd6fe98f R14: 00007f3d2279f9c0 R15: 000000000118bf2c

Allocated by task 7487:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:666 [inline]
 __register_sysctl_table+0x112/0x1090 fs/proc/proc_sysctl.c:1314
 neigh_sysctl_register+0x347/0x680 net/core/neighbour.c:3695
 devinet_sysctl_register+0xb1/0x230 net/ipv4/devinet.c:2609
 inetdev_init+0x225/0x4f0 net/ipv4/devinet.c:276
 inetdev_event+0x9c7/0x1530 net/ipv4/devinet.c:1531
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2034
 call_netdevice_notifiers_extack net/core/dev.c:2046 [inline]
 call_netdevice_notifiers net/core/dev.c:2060 [inline]
 register_netdevice+0x1068/0x1630 net/core/dev.c:9995
 __tun_chr_ioctl.isra.0+0x2c2f/0x4240 drivers/net/tun.c:2786
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Last call_rcu():
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_record_aux_stack+0xc0/0xf0 mm/kasan/generic.c:346
 __call_rcu kernel/rcu/tree.c:2953 [inline]
 call_rcu+0xbb/0x700 kernel/rcu/tree.c:3027
 __bpf_prog_put_noref kernel/bpf/syscall.c:1740 [inline]
 __bpf_prog_put_noref+0x107/0x1a0 kernel/bpf/syscall.c:1730
 __bpf_prog_put.constprop.0+0x162/0x1a0 kernel/bpf/syscall.c:1753
 bpf_prog_put kernel/bpf/syscall.c:1759 [inline]
 bpf_prog_release+0x33/0x40 kernel/bpf/syscall.c:1767
 __fput+0x285/0x920 fs/file_table.c:281
 task_work_run+0xdd/0x190 kernel/task_work.c:151
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:164 [inline]
 exit_to_user_mode_prepare+0x17e/0x1a0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff88805bdec000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 728 bytes inside of
 1024-byte region [ffff88805bdec000, ffff88805bdec400)
The buggy address belongs to the page:
page:000000004370568e refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805bde9800 pfn:0x5bde8
head:000000004370568e order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 ffffea00008eca08 ffffea0000a0ec08 ffff888010041140
raw: ffff88805bde9800 0000000000100008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805bdec180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805bdec200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805bdec280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff88805bdec300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805bdec380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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