==================================================================
BUG: KCSAN: data-race in __filemap_remove_folio / shmem_getpage_gfp

write to 0xffff888132d823e0 of 8 bytes by task 4767 on cpu 0:
 page_cache_delete mm/filemap.c:144 [inline]
 __filemap_remove_folio+0x1e1/0x2c0 mm/filemap.c:228
 __delete_from_page_cache include/linux/pagemap.h:934 [inline]
 __remove_mapping+0x49d/0x600 mm/vmscan.c:1317
 shrink_page_list+0x1508/0x2620 mm/vmscan.c:1892
 reclaim_pages+0x478/0x640 mm/vmscan.c:2636
 madvise_cold_or_pageout_pte_range+0x63f/0x680 mm/madvise.c:509
 walk_pmd_range mm/pagewalk.c:128 [inline]
 walk_pud_range mm/pagewalk.c:205 [inline]
 walk_p4d_range mm/pagewalk.c:240 [inline]
 walk_pgd_range mm/pagewalk.c:277 [inline]
 __walk_page_range+0x981/0x1160 mm/pagewalk.c:379
 walk_page_range+0x131/0x300 mm/pagewalk.c:475
 madvise_pageout_page_range mm/madvise.c:562 [inline]
 madvise_pageout mm/madvise.c:599 [inline]
 madvise_vma_behavior mm/madvise.c:988 [inline]
 madvise_walk_vmas mm/madvise.c:1207 [inline]
 do_madvise+0xd11/0x1180 mm/madvise.c:1385
 __do_sys_madvise mm/madvise.c:1398 [inline]
 __se_sys_madvise mm/madvise.c:1396 [inline]
 __x64_sys_madvise+0x5d/0x70 mm/madvise.c:1396
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888132d823e0 of 8 bytes by task 4780 on cpu 1:
 shmem_recalc_inode mm/shmem.c:363 [inline]
 shmem_getpage_gfp+0xf1b/0x12c0 mm/shmem.c:1932
 shmem_fault+0xd1/0x3c0 mm/shmem.c:2100
 __do_fault mm/memory.c:3872 [inline]
 do_read_fault mm/memory.c:4187 [inline]
 do_fault mm/memory.c:4316 [inline]
 handle_pte_fault mm/memory.c:4574 [inline]
 __handle_mm_fault mm/memory.c:4709 [inline]
 handle_mm_fault+0xba6/0x1590 mm/memory.c:4807
 faultin_page mm/gup.c:944 [inline]
 __get_user_pages+0x388/0xc80 mm/gup.c:1165
 populate_vma_page_range mm/gup.c:1497 [inline]
 __mm_populate+0x24d/0x370 mm/gup.c:1606
 mm_populate include/linux/mm.h:2675 [inline]
 vm_mmap_pgoff+0x160/0x1f0 mm/util.c:524
 ksys_mmap_pgoff+0xc2/0x320 mm/mmap.c:1630
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000000000000d0 -> 0x00000000000000ce

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 4780 Comm: syz-executor.1 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================