WARNING in __sk_destruct (2)

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in __sk_destruct batman fs				2	305d	338d	25/28	fixed on 2024/04/12 05:52
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8864 at lib/ref_tracker.c:228 ref_tracker_free+0x5fe/0x7e0 lib/ref_tracker.c:228
Modules linked in:
CPU: 1 PID: 8864 Comm: syz-executor.4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:ref_tracker_free+0x5fe/0x7e0 lib/ref_tracker.c:228
Code: 00 b1 00 8c e8 f3 16 92 06 43 0f b6 04 3e 84 c0 0f 85 ca 01 00 00 41 8b 7d 00 e8 4d dc ff ff e9 7c ff ff ff e8 a3 7c be fc 90 <0f> 0b 90 4d 85 e4 0f 85 c1 fa ff ff 4c 8b 64 24 08 4d 8d 74 24 48
RSP: 0018:ffffc90000a08b20 EFLAGS: 00010246
RAX: ffffffff84d677ad RBX: 0000000000000001 RCX: ffff88805f8c1e00
RDX: 0000000080000101 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000a08c50 R08: ffffffff84d67265 R09: 0000000000000000
R10: ffffc90000a08b60 R11: fffff5200014117c R12: ffff8880612011f8
R13: 1ffff92000141168 R14: ffffc90000a08b60 R15: dffffc0000000000
FS:  0000555578d5c480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0025dd000 CR3: 000000005e80e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __netns_tracker_free include/net/net_namespace.h:348 [inline]
 __sk_destruct+0x4fd/0x5f0 net/core/sock.c:2206
 rcu_do_batch kernel/rcu/tree.c:2196 [inline]
 rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2471
 __do_softirq+0x2bc/0x943 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:820 [inline]
 __dev_queue_xmit+0x15fd/0x3b10 net/core/dev.c:4362
 dev_queue_xmit include/linux/netdevice.h:3091 [inline]
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:307 [inline]
 __netlink_deliver_tap+0x54d/0x7c0 net/netlink/af_netlink.c:325
 netlink_deliver_tap+0x19d/0x1b0 net/netlink/af_netlink.c:338
 __netlink_sendskb net/netlink/af_netlink.c:1279 [inline]
 netlink_sendskb+0x68/0x140 net/netlink/af_netlink.c:1288
 netlink_unicast+0x39d/0x980 net/netlink/af_netlink.c:1376
 nlmsg_unicast include/net/netlink.h:1144 [inline]
 netlink_ack+0xd8f/0x12b0 net/netlink/af_netlink.c:2521
 netlink_rcv_skb+0x262/0x430 net/netlink/af_netlink.c:2565
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f4ebb67fb5c
Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b
RSP: 002b:00007fff44c54c20 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f4ebc2d4620 RCX: 00007f4ebb67fb5c
RDX: 0000000000000040 RSI: 00007f4ebc2d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff44c54c74 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f4ebc2d4670 R15: 0000000000000000
 </TASK>