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BUG: KCSAN: data-race in __delete_from_page_cache / folio_mapping

write to 0xffffea0004bbc6d8 of 8 bytes by task 23208 on cpu 1:
 page_cache_delete mm/filemap.c:144 [inline]
 __delete_from_page_cache+0x1b7/0x2c0 mm/filemap.c:231
 delete_from_page_cache+0x82/0x140 mm/filemap.c:265
 truncate_inode_page mm/truncate.c:219 [inline]
 truncate_inode_pages_range+0x8d7/0xa00 mm/truncate.c:397
 truncate_inode_pages+0x20/0x30 mm/truncate.c:425
 kill_bdev block/bdev.c:78 [inline]
 set_blocksize+0x24e/0x270 block/bdev.c:158
 sb_set_blocksize block/bdev.c:167 [inline]
 sb_min_blocksize+0x92/0x110 block/bdev.c:183
 ext4_fill_super+0x3a5/0x78f0 fs/ext4/super.c:3931
 mount_bdev+0x1e8/0x290 fs/super.c:1370
 ext4_mount+0x2d/0x40 fs/ext4/super.c:6522
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1500
 do_new_mount fs/namespace.c:2988 [inline]
 path_mount+0x11cf/0x1c40 fs/namespace.c:3318
 do_mount fs/namespace.c:3331 [inline]
 __do_sys_mount fs/namespace.c:3539 [inline]
 __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3516
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3516
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffea0004bbc6d8 of 8 bytes by task 30345 on cpu 0:
 folio_mapping+0x92/0x120 mm/util.c:722
 folio_evictable mm/internal.h:112 [inline]
 __pagevec_lru_add_fn+0x81/0x380 mm/swap.c:1042
 __pagevec_lru_add+0x1c3/0x270 mm/swap.c:1070
 folio_add_lru+0x11a/0x160 mm/swap.c:468
 lru_cache_add+0x37/0x50 mm/folio-compat.c:108
 lru_cache_add_inactive_or_unevictable+0x46/0x140 mm/swap.c:499
 do_anonymous_page+0x6fe/0x8d0 mm/memory.c:3800
 handle_pte_fault mm/memory.c:4549 [inline]
 __handle_mm_fault mm/memory.c:4686 [inline]
 handle_mm_fault+0x814/0x1590 mm/memory.c:4784
 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x1e/0x30
 copy_user_enhanced_fast_string+0xe/0x30
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
 copyout lib/iov_iter.c:157 [inline]
 copy_page_to_iter_iovec lib/iov_iter.c:228 [inline]
 __copy_page_to_iter lib/iov_iter.c:852 [inline]
 copy_page_to_iter+0x2d9/0x950 lib/iov_iter.c:880
 filemap_read+0x138b/0x16d0 mm/filemap.c:2689
 generic_file_read_iter+0x72/0x2a0 mm/filemap.c:2784
 blkdev_read_iter+0x98/0x140 block/fops.c:583
 call_read_iter include/linux/fs.h:2156 [inline]
 new_sync_read fs/read_write.c:400 [inline]
 vfs_read+0x66c/0x750 fs/read_write.c:481
 ksys_read+0xd9/0x190 fs/read_write.c:619
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:627
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0xffff8881010a05b8 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 30345 Comm: udevd Tainted: G        W         5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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