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BUG: KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes

write to 0xffff88814d416f60 of 8 bytes by task 8068 on cpu 1:
 writeback_sb_inodes+0x2da/0xad0 fs/fs-writeback.c:1930
 wb_writeback+0x252/0x6f0 fs/fs-writeback.c:2117
 wb_do_writeback fs/fs-writeback.c:2264 [inline]
 wb_workfn+0x1a8/0x940 fs/fs-writeback.c:2304
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335
 worker_thread+0x526/0x730 kernel/workqueue.c:3416
 kthread+0x1d1/0x210 kernel/kthread.c:388
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

read to 0xffff88814d416f60 of 8 bytes by task 31297 on cpu 0:
 __mark_inode_dirty+0x19f/0x7e0 fs/fs-writeback.c:2499
 mark_inode_dirty_sync include/linux/fs.h:2408 [inline]
 dquot_free_space include/linux/quotaops.h:380 [inline]
 dquot_free_block include/linux/quotaops.h:390 [inline]
 ext4_mb_new_blocks+0x169f/0x21e0 fs/ext4/mballoc.c:6251
 ext4_ext_map_blocks+0x10a1/0x33b0 fs/ext4/extents.c:4317
 ext4_map_blocks+0x72a/0xf50 fs/ext4/inode.c:623
 ext4_alloc_file_blocks+0x285/0x700 fs/ext4/extents.c:4494
 ext4_fallocate+0x782/0x1190 fs/ext4/extents.c:4791
 vfs_fallocate+0x380/0x3e0 fs/open.c:331
 ksys_fallocate fs/open.c:354 [inline]
 __do_sys_fallocate fs/open.c:362 [inline]
 __se_sys_fallocate fs/open.c:360 [inline]
 __x64_sys_fallocate+0x79/0xc0 fs/open.c:360
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x0000000000020007 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 31297 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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