syzbot

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BUG: KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty

write to 0xffff8881318d2230 of 8 bytes by task 1826 on cpu 0:
 __mark_inode_dirty+0x1bc/0x6c0 fs/fs-writeback.c:2434
 mark_inode_dirty include/linux/fs.h:2451 [inline]
 dquot_alloc_space include/linux/quotaops.h:317 [inline]
 dquot_alloc_block include/linux/quotaops.h:334 [inline]
 ext4_mb_new_blocks+0x1135/0x1ee0 fs/ext4/mballoc.c:5548
 ext4_ext_map_blocks+0x1658/0x2120 fs/ext4/extents.c:4285
 ext4_map_blocks+0x71e/0xf00 fs/ext4/inode.c:637
 ext4_getblk+0xc6/0x3e0 fs/ext4/inode.c:847
 ext4_bread+0x28/0x100 fs/ext4/inode.c:900
 ext4_append+0xd1/0x1c0 fs/ext4/namei.c:67
 ext4_init_new_dir+0x177/0x500 fs/ext4/namei.c:2893
 ext4_mkdir+0x329/0x760 fs/ext4/namei.c:2939
 vfs_mkdir+0x2c8/0x3d0 fs/namei.c:3883
 do_mkdirat+0x12e/0x2c0 fs/namei.c:3909
 __do_sys_mkdir fs/namei.c:3929 [inline]
 __se_sys_mkdir fs/namei.c:3927 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3927
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881318d2230 of 8 bytes by task 9116 on cpu 1:
 inode_is_dirtytime_only include/linux/fs.h:2470 [inline]
 __ext4_update_other_inode_time+0x45/0x550 fs/ext4/inode.c:5010
 ext4_update_other_inodes_time fs/ext4/inode.c:5053 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5102 [inline]
 ext4_mark_iloc_dirty+0x4c6/0x890 fs/ext4/inode.c:5694
 __ext4_mark_inode_dirty+0x4ec/0x5f0 fs/ext4/inode.c:5890
 ext4_ext_tree_init+0x94/0xa0 fs/ext4/extents.c:870
 __ext4_new_inode+0x29e6/0x2fc0 fs/ext4/ialloc.c:1334
 ext4_symlink+0x2cc/0x700 fs/ext4/namei.c:3293
 vfs_symlink+0x241/0x330 fs/namei.c:4248
 do_symlinkat+0x104/0x380 fs/namei.c:4277
 __do_sys_symlink fs/namei.c:4299 [inline]
 __se_sys_symlink fs/namei.c:4297 [inline]
 __x64_sys_symlink+0x52/0x60 fs/namei.c:4297
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000008008 -> 0x000000000000800f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9116 Comm: syz-executor.2 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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