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BUG: KCSAN: data-race in __delete_from_page_cache / folio_mapping

write to 0xffffea0004d53fd8 of 8 bytes by task 30196 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+0x97/0x1e0 mm/filemap.c:266
 truncate_inode_page+0x3e/0x50 mm/truncate.c:229
 shmem_undo_range+0x2a0/0xdb0 mm/shmem.c:953
 shmem_truncate_range mm/shmem.c:1056 [inline]
 shmem_evict_inode+0x115/0x560 mm/shmem.c:1138
 evict+0x1aa/0x410 fs/inode.c:590
 iput_final fs/inode.c:1670 [inline]
 iput+0x3ef/0x580 fs/inode.c:1696
 dentry_unlink_inode+0x23d/0x250 fs/dcache.c:376
 __dentry_kill+0x293/0x450 fs/dcache.c:582
 dput+0x218/0x430 fs/dcache.c:888
 __fput+0x3e4/0x520 fs/file_table.c:293
 ____fput+0x11/0x20 fs/file_table.c:313
 task_work_run+0x8e/0x110 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x160/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffea0004d53fd8 of 8 bytes by task 25738 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:1043
 __pagevec_lru_add+0x1c3/0x270 mm/swap.c:1071
 lru_add_drain_cpu+0x6a/0x260 mm/swap.c:613
 lru_add_drain+0x21/0x60 mm/swap.c:717
 exit_mmap+0x218/0x470 mm/mmap.c:3165
 __mmput+0x27/0x1b0 kernel/fork.c:1113
 mmput+0x3d/0x50 kernel/fork.c:1134
 exit_mm+0xdb/0x170 kernel/exit.c:507
 do_exit+0x608/0x17a0 kernel/exit.c:819
 do_group_exit+0xce/0x180 kernel/exit.c:929
 get_signal+0xfc3/0x1550 kernel/signal.c:2852
 arch_do_signal_or_restart+0x8c/0x2e0 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x113/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0xffff888133992ad0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25738 Comm: syz-executor.3 Tainted: G        W         5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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