hfsplus: add error checking for hfs_find_init()
hfs_find_init() may fail with ENOMEM, but there are places, where
the returned value is not checked. The consequences can be very
unpleasant, e.g. kfree uninitialized pointer and
inappropriate mutex unlocking.
The patch adds checks for errors in hfs_find_init().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/hfsplus/catalog.c b/fs/hfsplus/catalog.c
index b4ba1b3..4dfbfec 100644
--- a/fs/hfsplus/catalog.c
+++ b/fs/hfsplus/catalog.c
@@ -212,7 +212,9 @@
dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n",
str->name, cnid, inode->i_nlink);
- hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
+ err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
+ if (err)
+ return err;
hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
entry_size = hfsplus_fill_cat_thread(sb, &entry,
@@ -269,7 +271,9 @@
dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n",
str ? str->name : NULL, cnid);
- hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
+ err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
+ if (err)
+ return err;
if (!str) {
int len;
@@ -347,12 +351,14 @@
struct hfs_find_data src_fd, dst_fd;
hfsplus_cat_entry entry;
int entry_size, type;
- int err = 0;
+ int err;
dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n",
cnid, src_dir->i_ino, src_name->name,
dst_dir->i_ino, dst_name->name);
- hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
+ err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
+ if (err)
+ return err;
dst_fd = src_fd;
/* find the old dir entry and read the data */
