==================================================================
BUG: KCSAN: data-race in __delete_from_swap_cache / folio_mapping

write to 0xffffea00048b1ea8 of 8 bytes by task 24352 on cpu 1:
 __delete_from_swap_cache+0x1e8/0x280 mm/swap_state.c:161
 delete_from_swap_cache+0x73/0xe0 mm/swap_state.c:180
 folio_free_swap+0x188/0x1a0 mm/swapfile.c:1776
 do_swap_page+0x1546/0x2460 mm/memory.c:4735
 handle_pte_fault mm/memory.c:6000 [inline]
 __handle_mm_fault mm/memory.c:6140 [inline]
 handle_mm_fault+0x9a5/0x2c00 mm/memory.c:6309
 do_user_addr_fault+0x3fe/0x1090 arch/x86/mm/fault.c:1387
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

read to 0xffffea00048b1ea8 of 8 bytes by task 24349 on cpu 0:
 folio_mapping+0xdd/0x120 mm/util.c:699
 folio_evictable mm/internal.h:475 [inline]
 move_folios_to_lru+0x128/0x6a0 mm/vmscan.c:1921
 evict_folios+0x300b/0x33d0 mm/vmscan.c:4731
 try_to_shrink_lruvec+0x45a/0x7e0 mm/vmscan.c:4862
 lru_gen_shrink_lruvec mm/vmscan.c:5011 [inline]
 shrink_lruvec+0x22e/0x1a40 mm/vmscan.c:5756
 shrink_node_memcgs mm/vmscan.c:5992 [inline]
 shrink_node+0x686/0x2110 mm/vmscan.c:6033
 shrink_zones mm/vmscan.c:6277 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6339
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6667
 try_charge_memcg+0x3ab/0x870 mm/memcontrol.c:2302
 obj_cgroup_charge_pages+0xb7/0x1a0 mm/memcontrol.c:2693
 __memcg_kmem_charge_page+0x9f/0x170 mm/memcontrol.c:2737
 __alloc_frozen_pages_noprof+0x188/0x360 mm/page_alloc.c:4987
 alloc_pages_mpol+0xb3/0x250 mm/mempolicy.c:2301
 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline]
 alloc_pages_noprof+0x90/0x130 mm/mempolicy.c:2392
 vm_area_alloc_pages mm/vmalloc.c:3624 [inline]
 __vmalloc_area_node mm/vmalloc.c:3702 [inline]
 __vmalloc_node_range_noprof+0x6d5/0xe40 mm/vmalloc.c:3877
 __kvmalloc_node_noprof+0x312/0x4f0 mm/slub.c:5034
 ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:261
 hash_netiface_create+0x282/0x740 net/netfilter/ipset/ip_set_hash_gen.h:1568
 ip_set_create+0x3c9/0x960 net/netfilter/ipset/ip_set_core.c:1109
 nfnetlink_rcv_msg+0x4c6/0x590 net/netfilter/nfnetlink.c:303
 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2534
 nfnetlink_rcv+0x16b/0x1690 net/netfilter/nfnetlink.c:668
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x59e/0x670 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x142/0x180 net/socket.c:727
 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2566
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2655
 x64_sys_call+0x2999/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000002d0f -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 24349 Comm: syz.3.7160 Not tainted 6.15.0-syzkaller-09113-g8477ab143069 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
==================================================================