github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 09:36:22 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

exfat: serialize truncate against in-flight DIO

Browse Source 
exfat_setattr() did not call inode_dio_wait() before performing a size
change, leaving a window where a concurrent in-flight DIO write could be
operating on clusters that the truncate is about to free.

Add inode_dio_wait() before the truncate_setsize()/exfat_truncate()
sequence so that any in-flight DIO completes before cluster freeing
begins.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Namjae Jeon 2026-05-22 10:00:00 +09:00
parent b4b7fe2c7c
commit c7034e0bcb
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/exfat/file.c
View File

@ -406,6 +406,12 @@ int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
exfat_truncate_inode_atime(inode);
if (attr->ia_valid & ATTR_SIZE) {
/*
* Wait for any in-flight DIO to finish before truncating to
* prevent a concurrent DIO from writing to clusters that are
* about to be freed.
*/
inode_dio_wait(inode);
down_write(&EXFAT_I(inode)->truncate_lock);
truncate_setsize(inode, attr->ia_size);