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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 ffff88802f9852d8 by task syz-executor.5/10667

CPU: 0 PID: 10667 Comm: syz-executor.5 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:00007f220a9b5c78 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: 00007ffd00930bef R14: 00007f220a9b69c0 R15: 000000000118bf2c

Allocated by task 8171:
 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:554 [inline]
 syslog_print+0xb2/0x430 kernel/printk/printk.c:1459
 do_syslog.part.0+0x2a8/0x7c0 kernel/printk/printk.c:1615
 do_syslog+0x49/0x60 kernel/printk/printk.c:1596
 kmsg_read+0x90/0xb0 fs/proc/kmsg.c:40
 pde_read fs/proc/inode.c:321 [inline]
 proc_reg_read+0x119/0x300 fs/proc/inode.c:331
 vfs_read+0x1b5/0x570 fs/read_write.c:494
 ksys_read+0x12d/0x250 fs/read_write.c:634
 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
 sk_psock_put include/linux/skmsg.h:399 [inline]
 sock_map_unref+0x109/0x190 net/core/sock_map.c:185
 sock_hash_delete_from_link net/core/sock_map.c:935 [inline]
 sock_map_unlink net/core/sock_map.c:1508 [inline]
 sock_map_remove_links+0x389/0x530 net/core/sock_map.c:1520
 sock_map_close+0x12f/0x390 net/core/sock_map.c:1560
 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:475
 __sock_release+0xcd/0x280 net/socket.c:596
 sock_close+0x18/0x20 net/socket.c:1277
 __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 ffff88802f985000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 728 bytes inside of
 1024-byte region [ffff88802f985000, ffff88802f985400)
The buggy address belongs to the page:
page:0000000072615610 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802f983000 pfn:0x2f980
head:0000000072615610 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 ffffea0000bb3408 ffffea000062a008 ffff888010041140
raw: ffff88802f983000 0000000000100004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88802f985180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802f985200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802f985280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff88802f985300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802f985380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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