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BUG: KCSAN: data-race in __delete_from_page_cache / page_mapping

write to 0xffffea00042a0b98 of 8 bytes by task 27397 on cpu 0:
 page_cache_delete mm/filemap.c:140 [inline]
 __delete_from_page_cache+0x196/0x490 mm/filemap.c:238
 delete_from_page_cache+0xb1/0x110 mm/filemap.c:273
 truncate_inode_page+0x42/0x60 mm/truncate.c:228
 truncate_inode_pages_range+0x898/0x1130 mm/truncate.c:449
 truncate_inode_pages+0x2a/0x40 mm/truncate.c:476
 swap_inode_boot_loader fs/ext4/ioctl.c:160 [inline]
 ext4_ioctl+0x12fa/0x3340 fs/ext4/ioctl.c:1046
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x101/0x150 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x47/0x60 fs/ioctl.c:770
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffea00042a0b98 of 8 bytes by task 27394 on cpu 1:
 page_mapping+0x178/0x290 mm/util.c:675
 page_evictable mm/internal.h:84 [inline]
 __pagevec_lru_add_fn+0xdf/0x8c0 mm/swap.c:963
 pagevec_lru_move_fn+0xf5/0x170 mm/swap.c:211
 __pagevec_lru_add mm/swap.c:987 [inline]
 __lru_cache_add+0x119/0x1c0 mm/swap.c:411
 lru_cache_add+0x1b/0x30 mm/swap.c:447
 add_to_page_cache_lru+0x16b/0x260 mm/filemap.c:937
 ext4_mpage_readpages+0x31c/0x14d0 fs/ext4/readpage.c:259
 ext4_readpages+0x8e/0xb0 fs/ext4/inode.c:3243
 read_pages+0xa2/0x360 mm/readahead.c:126
 __do_page_cache_readahead+0x358/0x380 mm/readahead.c:212
 ra_submit mm/internal.h:62 [inline]
 ondemand_readahead+0x369/0x730 mm/readahead.c:492
 page_cache_async_readahead+0x237/0x260 mm/readahead.c:574
 generic_file_buffered_read mm/filemap.c:2044 [inline]
 generic_file_read_iter+0x1077/0x18c0 mm/filemap.c:2309
 ext4_file_read_iter fs/ext4/file.c:131 [inline]
 ext4_file_read_iter+0x103/0x360 fs/ext4/file.c:114
 call_read_iter include/linux/fs.h:1901 [inline]
 new_sync_read+0x306/0x450 fs/read_write.c:415
 __vfs_read+0x9e/0xb0 fs/read_write.c:428
 integrity_kernel_read+0x97/0xe0 security/integrity/iint.c:200
 ima_calc_file_hash_tfm+0x18f/0x240 security/integrity/ima/ima_crypto.c:358
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:389 [inline]
 ima_calc_file_hash+0x147/0xeb0 security/integrity/ima/ima_crypto.c:454
 ima_collect_measurement+0x385/0x3b0 security/integrity/ima/ima_api.c:249
 process_measurement+0x91a/0x1000 security/integrity/ima/ima_main.c:324
 ima_file_check+0x7e/0xb0 security/integrity/ima/ima_main.c:440
 do_open fs/namei.c:3231 [inline]
 path_openat+0x176e/0x23d0 fs/namei.c:3346
 do_filp_open+0x11e/0x1b0 fs/namei.c:3373
 do_sys_openat2+0x52e/0x680 fs/open.c:1148
 do_sys_open+0xa2/0x110 fs/open.c:1164
 ksys_open include/linux/syscalls.h:1386 [inline]
 __do_sys_open fs/open.c:1170 [inline]
 __se_sys_open fs/open.c:1168 [inline]
 __x64_sys_open+0x50/0x60 fs/open.c:1168
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 27394 Comm: syz-executor.5 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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