loop4: detected capacity change from 0 to 264192
EXT4-fs (loop4): invalid first ino: 0
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BUG: KCSAN: data-race in __add_to_page_cache_locked / filemap_write_and_wait_range

write to 0xffff888100423628 of 8 bytes by task 26438 on cpu 0:
 __add_to_page_cache_locked+0x276/0x4f0 mm/filemap.c:931
 add_to_page_cache_lru+0xa0/0x1b0 mm/filemap.c:984
 page_cache_ra_unbounded+0x274/0x430 mm/readahead.c:222
 do_page_cache_ra mm/readahead.c:269 [inline]
 force_page_cache_ra+0x256/0x290 mm/readahead.c:301
 page_cache_sync_ra+0xcc/0xe0 mm/readahead.c:575
 page_cache_sync_readahead include/linux/pagemap.h:883 [inline]
 filemap_get_pages mm/filemap.c:2545 [inline]
 filemap_read+0x3ad/0x1220 mm/filemap.c:2628
 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2779
 blkdev_read_iter+0xb9/0xf0 block/fops.c:545
 call_read_iter include/linux/fs.h:2157 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x66c/0x750 fs/read_write.c:485
 ksys_read+0xd9/0x190 fs/read_write.c:623
 __do_sys_read fs/read_write.c:633 [inline]
 __se_sys_read fs/read_write.c:631 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:631
 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 0xffff888100423628 of 8 bytes by task 410 on cpu 1:
 mapping_needs_writeback mm/filemap.c:639 [inline]
 filemap_write_and_wait_range+0x36/0x3c0 mm/filemap.c:703
 filemap_write_and_wait include/linux/fs.h:2865 [inline]
 __sync_blockdev block/bdev.c:193 [inline]
 sync_blockdev+0x3e/0x50 block/bdev.c:202
 kill_block_super+0x52/0x90 fs/super.c:1396
 deactivate_locked_super+0x65/0xd0 fs/super.c:335
 mount_bdev+0x204/0x290 fs/super.c:1370
 ext4_mount+0x2d/0x40 fs/ext4/super.c:6515
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1498
 do_new_mount fs/namespace.c:2988 [inline]
 path_mount+0x11ec/0x1d20 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

value changed: 0x00000000000000df -> 0x00000000000000e7

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 410 Comm: syz-executor.4 Tainted: G        W         5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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