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exfat: fix incorrect update of stream entry in __exfat_truncate()

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At truncate, there is a problem of incorrect updating in the file entry
pointer instead of stream entry. This will cause the problem of
overwriting the time field of the file entry to new_size. Fix it to
update stream entry.

Fixes: 98d917047e8b ("exfat: add file operations")
Cc: stable@vger.kernel.org # v5.7
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Git-commit: 29bbb14bfc80dd760b07d2be0a27e610562982e3
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: lixiang <lixiang@codeaurora.org>
This commit is contained in:
Namjae Jeon 2021-02-10 15:20:29 +08:00 • committed by lixiang
commit 522be1fd6a
1 changed files with 4 additions and 4 deletions
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8
fs/exfat/file.c
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@ -171,11 +171,11 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
/* File size should be zero if there is no cluster allocated */
if (ei->start_clu == EXFAT_EOF_CLUSTER) {
ep->dentry.stream.valid_size = 0;
ep->dentry.stream.size = 0;
ep2->dentry.stream.valid_size = 0;
ep2->dentry.stream.size = 0;
} else {
ep->dentry.stream.valid_size = cpu_to_le64(new_size);
ep->dentry.stream.size = ep->dentry.stream.valid_size;
ep2->dentry.stream.valid_size = cpu_to_le64(new_size);
ep2->dentry.stream.size = ep->dentry.stream.valid_size;
}
if (new_size == 0) {