From: Namjae Jeon Date: Wed, 3 Jun 2020 23:05:31 +0000 (+0900) Subject: exfat: fix incorrect update of stream entry in __exfat_truncate() X-Git-Tag: v5.7.3~47 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=213fdef3c1c660d0b64fd8fb0b5612eef005e661;p=users%2Fdwmw2%2Flinux.git exfat: fix incorrect update of stream entry in __exfat_truncate() commit 29bbb14bfc80dd760b07d2be0a27e610562982e3 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/exfat/file.c b/fs/exfat/file.c index c9db8eb0cfc3e..5b4ddff187312 100644 --- a/fs/exfat/file.c +++ b/fs/exfat/file.c @@ -170,11 +170,11 @@ 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) {