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BUG: KCSAN: data-race in __mark_inode_dirty / other_inode_match

read to 0xffff888125200240 of 8 bytes by task 7753 on cpu 1:
 other_inode_match+0x6b/0x5c0 fs/ext4/inode.c:5156
 find_inode_nowait+0x135/0x160 fs/inode.c:1437
 ext4_update_other_inodes_time fs/ext4/inode.c:5204 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5330 [inline]
 ext4_mark_iloc_dirty+0x12a8/0x1580 fs/ext4/inode.c:5876
 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:6055
 ext4_dirty_inode+0x86/0xb0 fs/ext4/inode.c:6086
 __mark_inode_dirty+0x5d4/0x940 fs/fs-writeback.c:2258
 mark_inode_dirty_sync include/linux/fs.h:2170 [inline]
 dquot_free_space include/linux/quotaops.h:373 [inline]
 dquot_free_block include/linux/quotaops.h:383 [inline]
 ext4_free_blocks+0x1446/0x17e0 fs/ext4/mballoc.c:4927
 ext4_remove_blocks fs/ext4/extents.c:2678 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2831 [inline]
 ext4_ext_remove_space+0x1841/0x32c0 fs/ext4/extents.c:3076
 ext4_ext_truncate+0x120/0x130 fs/ext4/extents.c:4599
 ext4_truncate+0x5a2/0x990 fs/ext4/inode.c:4511
 ext4_evict_inode+0x5d0/0xdb0 fs/ext4/inode.c:289
 evict+0x244/0x410 fs/inode.c:574
 iput_final fs/inode.c:1563 [inline]
 iput+0x371/0x4e0 fs/inode.c:1589
 dentry_unlink_inode+0x270/0x2e0 fs/dcache.c:374
 d_delete fs/dcache.c:2449 [inline]
 d_delete+0xdb/0xe0 fs/dcache.c:2438
 vfs_rmdir fs/namei.c:3884 [inline]
 vfs_rmdir+0x2e2/0x300 fs/namei.c:3849
 do_rmdir+0x2cb/0x300 fs/namei.c:3932
 __do_sys_rmdir fs/namei.c:3950 [inline]
 __se_sys_rmdir fs/namei.c:3948 [inline]
 __x64_sys_rmdir+0x2f/0x40 fs/namei.c:3948
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff888125200240 of 8 bytes by task 7702 on cpu 0:
 __mark_inode_dirty+0x1ce/0x940 fs/fs-writeback.c:2289
 mark_buffer_dirty+0x29c/0x2c0 fs/buffer.c:1116
 __block_commit_write.isra.0+0x11f/0x170 fs/buffer.c:2041
 block_commit_write fs/buffer.c:2433 [inline]
 block_page_mkwrite+0x226/0x230 fs/buffer.c:2482
 ext4_page_mkwrite+0x5af/0xce0 fs/ext4/inode.c:6217
 do_page_mkwrite+0x100/0x210 mm/memory.c:2208
 wp_page_shared mm/memory.c:2507 [inline]
 do_wp_page+0xd65/0x11f0 mm/memory.c:2619
 handle_pte_fault mm/memory.c:3865 [inline]
 __handle_mm_fault+0x1ab1/0x2c70 mm/memory.c:3973
 handle_mm_fault+0x21b/0x530 mm/memory.c:4010
 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
 __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7702 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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