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BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 lib/list_debug.c:26
Read of size 8 at addr ffff888066cc4460 by task syz-executor.3/8060

CPU: 1 PID: 8060 Comm: syz-executor.3 Not tainted 4.19.114-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+0x188/0x20d lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x212 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x88/0x2b9 mm/kasan/report.c:396
 __list_add_valid+0x93/0xa0 lib/list_debug.c:26
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 cma_listen_on_all drivers/infiniband/core/cma.c:2380 [inline]
 rdma_listen+0x609/0x880 drivers/infiniband/core/cma.c:3408
 ucma_listen+0x14d/0x1c0 drivers/infiniband/core/ucma.c:1100
 ucma_write+0x285/0x350 drivers/infiniband/core/ucma.c:1689
 __vfs_write+0xf7/0x760 fs/read_write.c:485
 vfs_write+0x206/0x550 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c879
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2321eb9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2321eba6d4 RCX: 000000000045c879
RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000007
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000cc0 R14: 00000000004cee6e R15: 000000000076bf0c

Allocated by task 7276:
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15b/0x770 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 sk_prot_alloc+0x18c/0x2d0 net/core/sock.c:1466
 sk_alloc+0x36/0xf50 net/core/sock.c:1520
 __netlink_create+0x63/0x270 net/netlink/af_netlink.c:643
 netlink_create+0x3a1/0x5d0 net/netlink/af_netlink.c:706
 __sock_create+0x3d5/0x740 net/socket.c:1276
 sock_create net/socket.c:1316 [inline]
 __sys_socket+0xef/0x200 net/socket.c:1346
 __do_sys_socket net/socket.c:1355 [inline]
 __se_sys_socket net/socket.c:1353 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1353
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9:
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/kasan.c:521
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xce/0x220 mm/slab.c:3822
 sk_prot_free net/core/sock.c:1503 [inline]
 __sk_destruct+0x579/0x780 net/core/sock.c:1583
 sk_destruct+0xb9/0xf0 net/core/sock.c:1598
 __sk_free+0xc2/0x2e0 net/core/sock.c:1609
 sk_free+0x3b/0x50 net/core/sock.c:1620
 deferred_put_nlk_sk+0x10d/0x280 net/netlink/af_netlink.c:743
 __rcu_reclaim kernel/rcu/rcu.h:236 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0xb2d/0x17f0 kernel/rcu/tree.c:2881
 __do_softirq+0x26c/0x93c kernel/softirq.c:292

The buggy address belongs to the object at ffff888066cc4280
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 480 bytes inside of
 2048-byte region [ffff888066cc4280, ffff888066cc4a80)
The buggy address belongs to the page:
page:ffffea00019b3100 count:1 mapcount:0 mapping:ffff88812c3dcc40 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffffea0001096308 ffffea00010ab888 ffff88812c3dcc40
raw: 0000000000000000 ffff888066cc4280 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888066cc4300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888066cc4380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888066cc4400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff888066cc4480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888066cc4500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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