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- Fix ftruncate failure when allocating non-contiguous clusters.
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Merge tag 'exfat-for-6.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat

Pull exfat fix from Namjae Jeon:

 - Fix ftruncate failure when allocating non-contiguous clusters

* tag 'exfat-for-6.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: fix appending discontinuous clusters to empty file
This commit is contained in:
Linus Torvalds 2024-03-01 12:22:30 -08:00
commit 3aec97e0c7
1 changed files with 21 additions and 14 deletions
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35
fs/exfat/file.c
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@ -35,13 +35,18 @@ static int exfat_cont_expand(struct inode *inode, loff_t size)
if (new_num_clusters == num_clusters)
goto out;
exfat_chain_set(&clu, ei->start_clu, num_clusters, ei->flags);
ret = exfat_find_last_cluster(sb, &clu, &last_clu);
if (ret)
return ret;
if (num_clusters) {
exfat_chain_set(&clu, ei->start_clu, num_clusters, ei->flags);
ret = exfat_find_last_cluster(sb, &clu, &last_clu);
if (ret)
return ret;
clu.dir = last_clu + 1;
} else {
last_clu = EXFAT_EOF_CLUSTER;
clu.dir = EXFAT_EOF_CLUSTER;
}
clu.dir = (last_clu == EXFAT_EOF_CLUSTER) ?
EXFAT_EOF_CLUSTER : last_clu + 1;
clu.size = 0;
clu.flags = ei->flags;
@ -51,17 +56,19 @@ static int exfat_cont_expand(struct inode *inode, loff_t size)
return ret;
/* Append new clusters to chain */
if (clu.flags != ei->flags) {
exfat_chain_cont_cluster(sb, ei->start_clu, num_clusters);
ei->flags = ALLOC_FAT_CHAIN;
}
if (clu.flags == ALLOC_FAT_CHAIN)
if (exfat_ent_set(sb, last_clu, clu.dir))
goto free_clu;
if (num_clusters) {
if (clu.flags != ei->flags)
if (exfat_chain_cont_cluster(sb, ei->start_clu, num_clusters))
goto free_clu;
if (num_clusters == 0)
if (clu.flags == ALLOC_FAT_CHAIN)
if (exfat_ent_set(sb, last_clu, clu.dir))
goto free_clu;
} else
ei->start_clu = clu.dir;
ei->flags = clu.flags;
out:
inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
/* Expanded range not zeroed, do not update valid_size */