------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 2 PID: 8906 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Modules linked in: CPU: 2 PID: 8906 Comm: syz-executor.3 Not tainted 6.9.0-rc4-syzkaller-00113-g2668e3ae2ef3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Code: 8b e8 97 6f d3 fc 90 0f 0b 90 90 e9 c3 fe ff ff e8 c8 9a 10 fd c6 05 c1 63 09 0b 01 90 48 c7 c7 c0 ba 6e 8b e8 74 6f d3 fc 90 <0f> 0b 90 90 e9 a0 fe ff ff 48 89 ef e8 e2 17 6d fd e9 44 fe ff ff RSP: 0018:ffffc90003c26120 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90003479000 RDX: 0000000000040000 RSI: ffffffff81512bf6 RDI: 0000000000000001 RBP: ffff88802672a02c R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000002 R12: ffff88802672a02c R13: 0000000000000000 R14: 00000000040201e0 R15: ffff888016527af8 FS: 0000000000000000(0000) GS:ffff88802c400000(0063) knlGS:00000000f5ebbb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f72f34de CR3: 000000002533c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:336 [inline] refcount_dec include/linux/refcount.h:351 [inline] dec_stack_record_count mm/page_owner.c:228 [inline] __reset_page_owner+0x2ea/0x370 mm/page_owner.c:266 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_folios+0x256/0xad0 mm/page_alloc.c:2536 shrink_folio_list+0x32e8/0x3f00 mm/vmscan.c:1428 evict_folios+0x6e6/0x1bb0 mm/vmscan.c:4537 try_to_shrink_lruvec+0x618/0x9b0 mm/vmscan.c:4733 shrink_one+0x3f8/0x7c0 mm/vmscan.c:4772 shrink_many mm/vmscan.c:4835 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935 shrink_node+0x8c/0xb0 mm/vmscan.c:5894 shrink_zones mm/vmscan.c:6152 [inline] do_try_to_free_pages+0x361/0x1a20 mm/vmscan.c:6214 try_to_free_pages+0x2b6/0x720 mm/vmscan.c:6449 __perform_reclaim mm/page_alloc.c:3774 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3796 [inline] __alloc_pages_slowpath mm/page_alloc.c:4202 [inline] __alloc_pages+0xb38/0x2460 mm/page_alloc.c:4588 alloc_pages_mpol+0x275/0x610 mm/mempolicy.c:2264 vm_area_alloc_pages mm/vmalloc.c:3561 [inline] __vmalloc_area_node mm/vmalloc.c:3637 [inline] __vmalloc_node_range+0xa26/0x14b0 mm/vmalloc.c:3818 kvmalloc_node+0x14f/0x1a0 mm/util.c:659 hash_netiface_create+0x3ea/0x1250 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0x62a/0x1310 net/netfilter/ipset/ip_set_core.c:1103 nfnetlink_rcv_msg+0x9c3/0x11e0 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2559 nfnetlink_rcv+0x1b4/0x430 net/netfilter/nfnetlink.c:659 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9b4/0xb50 net/socket.c:2584 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2638 __sys_sendmsg+0x117/0x1f0 net/socket.c:2667 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72c9579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5ebb5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi