WARNING: CPU: 0 PID: 3969 at lib/debugobjects.c:517 debug_print_object+0x17a/0x1f0 lib/debugobjects.c:514 Modules linked in: CPU: 0 PID: 3969 Comm: syz-executor.4 Not tainted 6.8.0-rc2-syzkaller-00251-g6897cea71837 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:debug_print_object+0x17a/0x1f0 lib/debugobjects.c:514 Code: e8 fb 03 4e fd 4c 8b 0b 48 c7 c7 a0 71 fe 8b 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f8 ff 34 24 e8 9b f8 af fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 2c 09 de 0a 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 RSP: 0018:ffffc9001374ead8 EFLAGS: 00010286 RAX: 8eb57ac558890400 RBX: ffffffff8bac9720 RCX: 0000000000040000 RDX: ffffc90009e29000 RSI: 0000000000007b17 RDI: 0000000000007b18 RBP: ffffffff8bfe7320 R08: ffffffff81577992 R09: 1ffff920026e9cac R10: dffffc0000000000 R11: fffff520026e9cad R12: 0000000000000000 R13: ffffffff8bfe7238 R14: dffffc0000000000 R15: ffff8880299b7050 FS: 00007f0311b4b6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f82a92d56c6 CR3: 000000002e0fe000 CR4: 0000000000350ef0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] debug_check_no_obj_freed+0x45b/0x580 lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2093 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x110/0x380 mm/slub.c:4409 hash_netiface4_destroy+0x297/0x2c0 net/netfilter/ipset/ip_set_hash_gen.h:460 ip_set_create+0x13b6/0x1780 net/netfilter/ipset/ip_set_core.c:1157 nfnetlink_rcv_msg+0xbee/0x1190 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 nfnetlink_rcv+0x294/0x2650 net/netfilter/nfnetlink.c:659 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f0310e7dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0311b4b0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0310fabf80 RCX: 00007f0310e7dda9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f0310eca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0310fabf80 R15: 00007ffe928f7818