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author | Al Viro <viro@zeniv.linux.org.uk> | 2021-03-05 23:02:34 +0300 |
---|---|---|
committer | Steve French <stfrench@microsoft.com> | 2021-04-26 00:28:23 +0300 |
commit | 8d7672235533dbeab4a5373b49f1b4273cdc2c6a (patch) | |
tree | e86654fbc3d834f515bcc97d77f36ae7ba5649d4 /fs/cifs/dfs_cache.c | |
parent | b9335f621064b95bbf3e9473e228c4b328ff3e8a (diff) | |
download | linux-8d7672235533dbeab4a5373b49f1b4273cdc2c6a.tar.xz |
cifs: don't cargo-cult strndup()
strndup(s, strlen(s)) is a highly unidiomatic way to spell strdup(s);
it's *NOT* safer in any way, since strlen() is just as sensitive to
NUL-termination as strdup() is.
strndup() is for situations when you need a copy of a known-sized
substring, not a magic security juju to drive the bad spirits away.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/dfs_cache.c')
-rw-r--r-- | fs/cifs/dfs_cache.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c index 098b4bc8da59..e4617ccf0a23 100644 --- a/fs/cifs/dfs_cache.c +++ b/fs/cifs/dfs_cache.c @@ -89,7 +89,7 @@ static int get_normalized_path(const char *path, char **npath) if (*path == '\\') { *npath = (char *)path; } else { - *npath = kstrndup(path, strlen(path), GFP_KERNEL); + *npath = kstrdup(path, GFP_KERNEL); if (!*npath) return -ENOMEM; convert_delimiter(*npath, '\\'); @@ -358,7 +358,7 @@ static struct cache_dfs_tgt *alloc_target(const char *name, int path_consumed) t = kmalloc(sizeof(*t), GFP_ATOMIC); if (!t) return ERR_PTR(-ENOMEM); - t->name = kstrndup(name, strlen(name), GFP_ATOMIC); + t->name = kstrdup(name, GFP_ATOMIC); if (!t->name) { kfree(t); return ERR_PTR(-ENOMEM); @@ -419,7 +419,7 @@ static struct cache_entry *alloc_cache_entry(const char *path, if (!ce) return ERR_PTR(-ENOMEM); - ce->path = kstrndup(path, strlen(path), GFP_KERNEL); + ce->path = kstrdup(path, GFP_KERNEL); if (!ce->path) { kmem_cache_free(cache_slab, ce); return ERR_PTR(-ENOMEM); @@ -531,7 +531,7 @@ static struct cache_entry *lookup_cache_entry(const char *path, unsigned int *ha char *s, *e; char sep; - npath = kstrndup(path, strlen(path), GFP_KERNEL); + npath = kstrdup(path, GFP_KERNEL); if (!npath) return ERR_PTR(-ENOMEM); @@ -641,7 +641,7 @@ static int __update_cache_entry(const char *path, if (ce->tgthint) { s = ce->tgthint->name; - th = kstrndup(s, strlen(s), GFP_ATOMIC); + th = kstrdup(s, GFP_ATOMIC); if (!th) return -ENOMEM; } @@ -786,11 +786,11 @@ static int setup_referral(const char *path, struct cache_entry *ce, memset(ref, 0, sizeof(*ref)); - ref->path_name = kstrndup(path, strlen(path), GFP_ATOMIC); + ref->path_name = kstrdup(path, GFP_ATOMIC); if (!ref->path_name) return -ENOMEM; - ref->node_name = kstrndup(target, strlen(target), GFP_ATOMIC); + ref->node_name = kstrdup(target, GFP_ATOMIC); if (!ref->node_name) { rc = -ENOMEM; goto err_free_path; @@ -828,7 +828,7 @@ static int get_targets(struct cache_entry *ce, struct dfs_cache_tgt_list *tl) goto err_free_it; } - it->it_name = kstrndup(t->name, strlen(t->name), GFP_ATOMIC); + it->it_name = kstrdup(t->name, GFP_ATOMIC); if (!it->it_name) { kfree(it); rc = -ENOMEM; @@ -1166,7 +1166,7 @@ int dfs_cache_add_vol(char *mntdata, struct smb3_fs_context *ctx, const char *fu if (!vi) return -ENOMEM; - vi->fullpath = kstrndup(fullpath, strlen(fullpath), GFP_KERNEL); + vi->fullpath = kstrdup(fullpath, GFP_KERNEL); if (!vi->fullpath) { rc = -ENOMEM; goto err_free_vi; |