==================================================================
BUG: KCSAN: data-race in __add_to_page_cache_locked / truncate_inode_pages_range

write to 0xffff888125180338 of 8 bytes by task 12909 on cpu 1:
 __add_to_page_cache_locked+0x298/0x780 mm/filemap.c:868
 add_to_page_cache_lru+0xc4/0x260 mm/filemap.c:921
 ext4_mpage_readpages+0x339/0x14e0 fs/ext4/readpage.c:259
 ext4_readpages+0x92/0xc0 fs/ext4/inode.c:3245
 read_pages+0xa2/0x2d0 mm/readahead.c:126
 __do_page_cache_readahead+0x353/0x390 mm/readahead.c:212
 ra_submit mm/internal.h:62 [inline]
 ondemand_readahead+0x35d/0x710 mm/readahead.c:492
 page_cache_async_readahead+0x22c/0x250 mm/readahead.c:574
 generic_file_buffered_read mm/filemap.c:2037 [inline]
 generic_file_read_iter+0xffc/0x1440 mm/filemap.c:2302
 ext4_file_read_iter fs/ext4/file.c:131 [inline]
 ext4_file_read_iter+0x10f/0x370 fs/ext4/file.c:114
 call_read_iter include/linux/fs.h:1895 [inline]
 new_sync_read+0x389/0x4f0 fs/read_write.c:414
 __vfs_read+0xb1/0xc0 fs/read_write.c:427
 integrity_kernel_read+0xa1/0xe0 security/integrity/iint.c:200
 ima_calc_file_hash_tfm+0x1b5/0x270 security/integrity/ima/ima_crypto.c:360
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:391 [inline]
 ima_calc_file_hash+0x158/0xf30 security/integrity/ima/ima_crypto.c:456
 ima_collect_measurement+0x3b1/0x3e0 security/integrity/ima/ima_api.c:249
 process_measurement+0x9e6/0x1190 security/integrity/ima/ima_main.c:326
 ima_file_check+0x7e/0xb0 security/integrity/ima/ima_main.c:442
 do_last fs/namei.c:3494 [inline]
 path_openat+0xe6e/0x3150 fs/namei.c:3607
 do_filp_open+0x11e/0x1b0 fs/namei.c:3637
 do_sys_openat2+0x4f5/0x620 fs/open.c:1149
 do_sys_open+0xa3/0x110 fs/open.c:1165
 ksys_open include/linux/syscalls.h:1386 [inline]
 __do_sys_open fs/open.c:1171 [inline]
 __se_sys_open fs/open.c:1169 [inline]
 __x64_sys_open+0x55/0x70 fs/open.c:1169
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888125180338 of 8 bytes by task 12911 on cpu 0:
 truncate_inode_pages_range+0x4a/0x1120 mm/truncate.c:303
 truncate_inode_pages+0x2e/0x40 mm/truncate.c:476
 swap_inode_boot_loader fs/ext4/ioctl.c:160 [inline]
 ext4_ioctl+0x12b4/0x32b0 fs/ext4/ioctl.c:1058
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x109/0x150 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:770
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12911 Comm: syz-executor.4 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================