==================================================================
BUG: KCSAN: data-race in __mark_inode_dirty / other_inode_match

read to 0xffff888128fe4640 of 8 bytes by task 12266 on cpu 0:
 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_unlink fs/ext4/namei.c:3195 [inline]
 ext4_unlink+0x695/0x7d0 fs/ext4/namei.c:3140
 vfs_unlink+0x225/0x3e0 fs/namei.c:3991
 do_unlinkat+0x32b/0x530 fs/namei.c:4055
 __do_sys_unlink fs/namei.c:4102 [inline]
 __se_sys_unlink fs/namei.c:4100 [inline]
 __x64_sys_unlink+0x3b/0x50 fs/namei.c:4100
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff888128fe4640 of 8 bytes by task 12320 on cpu 1:
 __mark_inode_dirty+0x1ce/0x940 fs/fs-writeback.c:2289
 mark_inode_dirty include/linux/fs.h:2165 [inline]
 dquot_alloc_space include/linux/quotaops.h:308 [inline]
 dquot_alloc_block include/linux/quotaops.h:325 [inline]
 ext4_mb_new_blocks+0x2fa/0x1de0 fs/ext4/mballoc.c:4506
 ext4_ext_map_blocks+0x1c1e/0x2330 fs/ext4/extents.c:4460
 ext4_map_blocks+0x23a/0xfa0 fs/ext4/inode.c:640
 ext4_getblk+0x82/0x380 fs/ext4/inode.c:974
 ext4_bread+0x4a/0x210 fs/ext4/inode.c:1024
 ext4_append+0xc8/0x1f0 fs/ext4/namei.c:67
 ext4_init_new_dir fs/ext4/namei.c:2728 [inline]
 ext4_mkdir+0x421/0x820 fs/ext4/namei.c:2773
 vfs_mkdir+0x283/0x390 fs/namei.c:3807
 do_mkdirat+0x1ac/0x1f0 fs/namei.c:3830
 __do_sys_mkdir fs/namei.c:3846 [inline]
 __se_sys_mkdir fs/namei.c:3844 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3844
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 12320 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================