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| author | Alexey Khoroshilov | 2011-07-06 00:29:59 +0200 |
|---|---|---|
| committer | Christoph Hellwig | 2011-07-07 17:45:46 +0200 |
| commit | 5bd9d99d107c56ff7b35a29e930d85f91a07b2fd (patch) | |
| tree | b5db237ebff38c90b95f01d8cca28bc8c2536e7f /fs/hfsplus/catalog.c | |
| parent | hfsplus: lift the 2TB size limit (diff) | |
| download | kernel-qcow2-linux-5bd9d99d107c56ff7b35a29e930d85f91a07b2fd.tar.gz kernel-qcow2-linux-5bd9d99d107c56ff7b35a29e930d85f91a07b2fd.tar.xz kernel-qcow2-linux-5bd9d99d107c56ff7b35a29e930d85f91a07b2fd.zip | |
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>
Diffstat (limited to 'fs/hfsplus/catalog.c')
| -rw-r--r-- | fs/hfsplus/catalog.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/hfsplus/catalog.c b/fs/hfsplus/catalog.c index b4ba1b319333..4dfbfec357e8 100644 --- a/fs/hfsplus/catalog.c +++ b/fs/hfsplus/catalog.c @@ -212,7 +212,9 @@ int hfsplus_create_cat(u32 cnid, struct inode *dir, 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 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) 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 @@ int hfsplus_rename_cat(u32 cnid, 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 */ |