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BUG: KCSAN: data-race in __delete_from_swap_cache / folio_mapping

write to 0xffffea00048ab928 of 8 bytes by task 8205 on cpu 1:
 __delete_from_swap_cache+0x1f2/0x290 mm/swap_state.c:161
 delete_from_swap_cache+0x72/0xe0 mm/swap_state.c:241
 shmem_swapin_folio+0x69e/0x760 mm/shmem.c:1928
 shmem_get_folio_gfp+0x278/0xb70 mm/shmem.c:1991
 shmem_fault+0x100/0x260 mm/shmem.c:2255
 __do_fault+0xb6/0x200 mm/memory.c:4556
 do_shared_fault mm/memory.c:4981 [inline]
 do_fault mm/memory.c:5055 [inline]
 do_pte_missing mm/memory.c:3897 [inline]
 handle_pte_fault mm/memory.c:5381 [inline]
 __handle_mm_fault mm/memory.c:5524 [inline]
 handle_mm_fault+0xbba/0x2a80 mm/memory.c:5689
 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x296/0x650 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
 rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:65
 copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
 copy_to_user_iter lib/iov_iter.c:25 [inline]
 iterate_iovec include/linux/iov_iter.h:51 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:247 [inline]
 iterate_and_advance include/linux/iov_iter.h:271 [inline]
 _copy_to_iter+0x2c5/0xaf0 lib/iov_iter.c:185
 copy_page_to_iter+0x171/0x2b0 lib/iov_iter.c:362
 shmem_file_read_iter+0x2e4/0x550 mm/shmem.c:2865
 do_iter_readv_writev+0x339/0x3e0
 vfs_readv+0x1e5/0x660 fs/read_write.c:932
 do_preadv fs/read_write.c:1049 [inline]
 __do_sys_preadv fs/read_write.c:1099 [inline]
 __se_sys_preadv fs/read_write.c:1094 [inline]
 __x64_sys_preadv+0x100/0x1c0 fs/read_write.c:1094
 x64_sys_call+0x1d82/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:296
 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

read to 0xffffea00048ab928 of 8 bytes by task 8201 on cpu 0:
 folio_mapping+0xd2/0x110 mm/util.c:797
 folio_evictable mm/internal.h:353 [inline]
 lru_add_fn+0x8d/0x430 mm/swap.c:184
 folio_batch_move_lru+0x20c/0x2c0 mm/swap.c:220
 folio_batch_add_and_move mm/swap.c:236 [inline]
 folio_add_lru+0xd4/0x130 mm/swap.c:522
 folio_putback_lru mm/vmscan.c:818 [inline]
 reclaim_folio_list+0x145/0x1e0 mm/vmscan.c:2129
 reclaim_pages+0x215/0x270 mm/vmscan.c:2161
 madvise_cold_or_pageout_pte_range+0xe43/0xec0 mm/madvise.c:550
 walk_pmd_range mm/pagewalk.c:143 [inline]
 walk_pud_range mm/pagewalk.c:221 [inline]
 walk_p4d_range mm/pagewalk.c:256 [inline]
 walk_pgd_range+0x807/0xee0 mm/pagewalk.c:293
 __walk_page_range+0xc5/0x330 mm/pagewalk.c:395
 walk_page_range+0x395/0x4e0 mm/pagewalk.c:521
 madvise_pageout_page_range mm/madvise.c:609 [inline]
 madvise_pageout mm/madvise.c:636 [inline]
 madvise_vma_behavior mm/madvise.c:1042 [inline]
 madvise_walk_vmas mm/madvise.c:1268 [inline]
 do_madvise+0x1b09/0x2610 mm/madvise.c:1464
 __do_sys_madvise mm/madvise.c:1481 [inline]
 __se_sys_madvise mm/madvise.c:1479 [inline]
 __x64_sys_madvise+0x61/0x70 mm/madvise.c:1479
 x64_sys_call+0x285d/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:29
 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: 0x000000000000019f -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8201 Comm: syz.3.1675 Not tainted 6.10.0-rc5-syzkaller-00035-gafcd48134c58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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