ODEBUG: free active (active state 0) object: ffff88805fa0f050 object type: timer_list hint: hash_netiface4_gc+0x0/0x470 net/netfilter/ipset/ip_set_hash_gen.h:537 WARNING: CPU: 0 PID: 11871 at lib/debugobjects.c:514 debug_print_object+0x1a3/0x2b0 lib/debugobjects.c:514 Modules linked in: CPU: 0 PID: 11871 Comm: syz-executor.1 Not tainted 6.8.0-rc2-syzkaller-00199-g021533194476 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:debug_print_object+0x1a3/0x2b0 lib/debugobjects.c:514 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 48 8b 14 dd 80 a6 6e 8b 41 56 4c 89 e6 48 c7 c7 e0 99 6e 8b e8 1e c1 d5 fc 90 <0f> 0b 90 90 58 83 05 c5 c9 23 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0018:ffffc90003f2f038 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffc90036272000 RDX: 0000000000040000 RSI: ffffffff814f74a6 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8b6ea080 R13: ffffffff8b0f24c0 R14: ffffffff8919e990 R15: ffffc90003f2f148 FS: 00007f35463e96c0(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f92eb4d66e4 CR3: 0000000122c2c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] debug_check_no_obj_freed+0x4b8/0x600 lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2093 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x252/0x370 mm/slub.c:4409 hash_netiface4_destroy+0x204/0x3a0 net/netfilter/ipset/ip_set_hash_gen.h:460 ip_set_create+0xd9f/0x1360 net/netfilter/ipset/ip_set_core.c:1157 nfnetlink_rcv_msg+0x9c3/0x11e0 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 nfnetlink_rcv+0x1b4/0x430 net/netfilter/nfnetlink.c:659 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8bb/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0xab5/0xc90 net/socket.c:2584 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2638 __sys_sendmsg+0x117/0x1f0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f354567dda9 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:00007f35463e90c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f35457abf80 RCX: 00007f354567dda9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f35456ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f35457abf80 R15: 00007ffd70a9dd28