syzbot

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BUG: KCSAN: data-race in __delete_from_swap_cache / folio_mapping

write to 0xffffea0004b838a8 of 8 bytes by task 24685 on cpu 1:
 __delete_from_swap_cache+0x1f0/0x290 mm/swap_state.c:163
 delete_from_swap_cache+0x72/0xe0 mm/swap_state.c:243
 folio_free_swap+0x18b/0x1a0 mm/swapfile.c:1766
 do_swap_page+0x16a9/0x2550 mm/memory.c:4626
 handle_pte_fault mm/memory.c:5891 [inline]
 __handle_mm_fault mm/memory.c:6031 [inline]
 handle_mm_fault+0x8e4/0x2b00 mm/memory.c:6200
 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x3b9/0x650 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

read to 0xffffea0004b838a8 of 8 bytes by task 24686 on cpu 0:
 folio_mapping+0xdb/0x120 mm/util.c:860
 folio_evictable mm/internal.h:437 [inline]
 sort_folio mm/vmscan.c:4398 [inline]
 scan_folios mm/vmscan.c:4524 [inline]
 isolate_folios mm/vmscan.c:4619 [inline]
 evict_folios+0xda9/0x2fc0 mm/vmscan.c:4648
 try_to_shrink_lruvec+0x3f7/0x580 mm/vmscan.c:4821
 lru_gen_shrink_lruvec mm/vmscan.c:4970 [inline]
 shrink_lruvec+0x22d/0x1850 mm/vmscan.c:5715
 shrink_node_memcgs mm/vmscan.c:5951 [inline]
 shrink_node+0x603/0x1d80 mm/vmscan.c:5992
 shrink_zones mm/vmscan.c:6237 [inline]
 do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6299
 try_to_free_mem_cgroup_pages+0x1e3/0x490 mm/vmscan.c:6631
 try_charge_memcg+0x2bc/0x7f0 mm/memcontrol.c:2264
 obj_cgroup_charge_pages+0xbd/0x1a0 mm/memcontrol.c:2645
 __memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:2672
 __alloc_frozen_pages_noprof+0x1bc/0x340 mm/page_alloc.c:4757
 alloc_pages_mpol+0xb4/0x260 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline]
 alloc_pages_noprof+0xe8/0x130 mm/mempolicy.c:2361
 vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
 __vmalloc_area_node mm/vmalloc.c:3669 [inline]
 __vmalloc_node_range_noprof+0x6e5/0xe70 mm/vmalloc.c:3846
 __kvmalloc_node_noprof+0x121/0x170 mm/util.c:687
 ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:261
 hash_netiface_create+0x273/0x730 net/netfilter/ipset/ip_set_hash_gen.h:1568
 ip_set_create+0x3b1/0x970 net/netfilter/ipset/ip_set_core.c:1109
 nfnetlink_rcv_msg+0x4a9/0x570 net/netfilter/nfnetlink.c:302
 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2533
 nfnetlink_rcv+0x16c/0x15d0 net/netfilter/nfnetlink.c:667
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:733
 ____sys_sendmsg+0x326/0x4b0 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x19d/0x230 net/socket.c:2659
 __do_sys_sendmsg net/socket.c:2664 [inline]
 __se_sys_sendmsg net/socket.c:2662 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2662
 x64_sys_call+0x2734/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000001d96 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 24686 Comm: syz.0.3705 Tainted: G        W          6.14.0-rc7-syzkaller-00069-g81e4f8d68c66 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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