==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x79/0x1f60 kernel/locking/lockdep.c:4923
Read of size 8 at addr ffff88802011c130 by task syz-executor.5/6240

CPU: 0 PID: 6240 Comm: syz-executor.5 Not tainted 6.0.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x65/0x4b0 mm/kasan/report.c:317
 print_report+0x108/0x220 mm/kasan/report.c:433
 kasan_report+0xfb/0x130 mm/kasan/report.c:495
 __lock_acquire+0x79/0x1f60 kernel/locking/lockdep.c:4923
 lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5666
 lock_sock_nested+0x44/0xf0 net/core/sock.c:3393
 lock_sock include/net/sock.h:1712 [inline]
 nr_accept+0x510/0x660 net/netrom/af_netrom.c:805
 do_accept+0x4d0/0x6d0 net/socket.c:1856
 __sys_accept4_file net/socket.c:1897 [inline]
 __sys_accept4+0x97/0x100 net/socket.c:1927
 __do_sys_accept net/socket.c:1944 [inline]
 __se_sys_accept net/socket.c:1941 [inline]
 __x64_sys_accept+0x79/0x90 net/socket.c:1941
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7141c89279
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7142e04168 EFLAGS: 00000246 ORIG_RAX: 000000000000002b
RAX: ffffffffffffffda RBX: 00007f7141d9c050 RCX: 00007f7141c89279
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f7141ce32e9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcf42a8dff R14: 00007f7142e04300 R15: 0000000000022000
 </TASK>

Allocated by task 6224:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:516
 kasan_kmalloc include/linux/kasan.h:234 [inline]
 __kmalloc+0x226/0x370 mm/slub.c:4424
 kmalloc include/linux/slab.h:605 [inline]
 sk_prot_alloc+0xde/0x200 net/core/sock.c:1976
 sk_alloc+0x36/0x340 net/core/sock.c:2029
 nr_create+0x9d/0x500 net/netrom/af_netrom.c:433
 __sock_create+0x3fd/0x850 net/socket.c:1515
 sock_create net/socket.c:1566 [inline]
 __sys_socket_create net/socket.c:1603 [inline]
 __sys_socket+0x137/0x3a0 net/socket.c:1636
 __do_sys_socket net/socket.c:1649 [inline]
 __se_sys_socket net/socket.c:1647 [inline]
 __x64_sys_socket+0x76/0x80 net/socket.c:1647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 6250:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:367
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1754 [inline]
 slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1780
 slab_free mm/slub.c:3534 [inline]
 kfree+0xda/0x210 mm/slub.c:4562
 sk_prot_free net/core/sock.c:2012 [inline]
 __sk_destruct+0x487/0x5d0 net/core/sock.c:2098
 call_timer_fn+0xf5/0x210 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers+0x76a/0x980 kernel/time/timer.c:1790
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
 __do_softirq+0x382/0x793 kernel/softirq.c:571

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348
 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2793
 netlink_release+0x12fc/0x1720 net/netlink/af_netlink.c:815
 __sock_release net/socket.c:650 [inline]
 sock_close+0xd7/0x260 net/socket.c:1365
 __fput+0x3b9/0x820 fs/file_table.c:320
 task_work_run+0x146/0x1c0 kernel/task_work.c:177
 get_signal+0x15d9/0x1780 kernel/signal.c:2634
 arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:166
 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348
 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2793
 netlink_release+0x12fc/0x1720 net/netlink/af_netlink.c:815
 __sock_release net/socket.c:650 [inline]
 sock_release+0x7a/0x140 net/socket.c:678
 diag_net_exit+0x3c/0x60 net/core/sock_diag.c:325
 ops_exit_list net/core/net_namespace.c:163 [inline]
 cleanup_net+0x758/0xc50 net/core/net_namespace.c:595
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

The buggy address belongs to the object at ffff88802011c000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 304 bytes inside of
 2048-byte region [ffff88802011c000, ffff88802011c800)

The buggy address belongs to the physical page:
page:ffffea0000804600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20118
head:ffffea0000804600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888012042000
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3685, tgid 3685 (kworker/1:3), ts 161448243108, free_ts 158083635230
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5515
 alloc_slab_page+0x70/0xf0 mm/slub.c:1824
 allocate_slab+0x5e/0x520 mm/slub.c:1969
 new_slab mm/slub.c:2029 [inline]
 ___slab_alloc+0x42e/0xce0 mm/slub.c:3031
 __slab_alloc mm/slub.c:3118 [inline]
 slab_alloc_node mm/slub.c:3209 [inline]
 __kmalloc_node_track_caller+0x2bd/0x3f0 mm/slub.c:4955
 kmalloc_reserve net/core/skbuff.c:358 [inline]
 __alloc_skb+0x11d/0x620 net/core/skbuff.c:430
 alloc_skb include/linux/skbuff.h:1257 [inline]
 alloc_skb_with_frags+0xaf/0x810 net/core/skbuff.c:6017
 sock_alloc_send_pskb+0x930/0xa70 net/core/sock.c:2665
 sock_alloc_send_skb include/net/sock.h:1866 [inline]
 mld_newpack+0x1e0/0xa90 net/ipv6/mcast.c:1748
 add_grhead+0x5e/0x290 net/ipv6/mcast.c:1851
 add_grec+0x14c9/0x17c0 net/ipv6/mcast.c:1989
 mld_send_initial_cr+0x1f6/0x370 net/ipv6/mcast.c:2236
 mld_dad_work+0x3c/0x3f0 net/ipv6/mcast.c:2262
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1449 [inline]
 free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499
 free_unref_page_prepare mm/page_alloc.c:3380 [inline]
 free_unref_page+0x7d/0x630 mm/page_alloc.c:3476
 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:447
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slub.c:3243 [inline]
 slab_alloc mm/slub.c:3251 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3258 [inline]
 kmem_cache_alloc+0x1a6/0x310 mm/slub.c:3268
 getname_flags+0xb8/0x4e0 fs/namei.c:139
 do_sys_openat2+0xd2/0x500 fs/open.c:1305
 do_sys_open fs/open.c:1327 [inline]
 __do_sys_openat fs/open.c:1343 [inline]
 __se_sys_openat fs/open.c:1338 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1338
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88802011c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802011c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802011c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88802011c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802011c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================