syzbot

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BUG: KCSAN: data-race in ext4_es_is_delayed / ext4_es_lookup_extent

read to 0xffff8881251b22f0 of 8 bytes by task 22874 on cpu 0:
 ext4_es_is_delayed+0x1f/0x50 fs/ext4/extents_status.h:174
 __es_find_extent_range+0x164/0x270 fs/ext4/extents_status.c:292
 ext4_es_find_extent_range+0x71/0x260 fs/ext4/extents_status.c:317
 ext4_ext_put_gap_in_cache+0x50/0xf0 fs/ext4/extents.c:2423
 ext4_ext_map_blocks+0x1157/0x2320 fs/ext4/extents.c:4383
 ext4_da_map_blocks fs/ext4/inode.c:1735 [inline]
 ext4_da_get_block_prep+0x755/0xa60 fs/ext4/inode.c:1812
 ext4_block_write_begin+0x33e/0xba0 fs/ext4/inode.c:1055
 ext4_da_write_begin+0x208/0x840 fs/ext4/inode.c:2996
 generic_perform_write+0x136/0x320 mm/filemap.c:3309
 ext4_buffered_write_iter+0x143/0x290 fs/ext4/file.c:252
 ext4_file_write_iter+0xf4/0xd40 fs/ext4/file.c:547
 call_write_iter include/linux/fs.h:1902 [inline]
 new_sync_write+0x388/0x4a0 fs/read_write.c:483
 __vfs_write+0xb1/0xc0 fs/read_write.c:496
 vfs_write fs/read_write.c:558 [inline]
 vfs_write+0x18a/0x390 fs/read_write.c:542
 ksys_write+0xd5/0x1b0 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x4c/0x60 fs/read_write.c:620
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8881251b22f0 of 8 bytes by task 22871 on cpu 1:
 ext4_es_set_referenced fs/ext4/extents_status.h:194 [inline]
 ext4_es_lookup_extent+0x406/0x580 fs/ext4/extents_status.c:950
 ext4_map_blocks+0xbd/0xff0 fs/ext4/inode.c:513
 mpage_map_one_extent fs/ext4/inode.c:2366 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2419 [inline]
 ext4_writepages+0x135e/0x2500 fs/ext4/inode.c:2771
 do_writepages+0x6b/0x170 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x1c5/0x230 mm/filemap.c:421
 __filemap_fdatawrite mm/filemap.c:429 [inline]
 filemap_flush+0x2d/0x40 mm/filemap.c:456
 ext4_alloc_da_blocks+0x78/0x180 fs/ext4/inode.c:3145
 ext4_release_file+0x10d/0x210 fs/ext4/file.c:141
 __fput+0x1e1/0x520 fs/file_table.c:280
 ____fput+0x1f/0x30 fs/file_table.c:313
 task_work_run+0xf6/0x130 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x2b4/0x2c0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 22871 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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