diff options
| -rw-r--r-- | fs/ext4/ext4fs.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c index 85dc122f30..e2b740cac4 100644 --- a/fs/ext4/ext4fs.c +++ b/fs/ext4/ext4fs.c @@ -66,13 +66,15 @@ int ext4fs_read_file(struct ext2fs_node *node, loff_t pos, ext_cache_init(&cache); - if (blocksize <= 0) - return -1; - /* Adjust len so it we can't read past the end of the file. */ if (len + pos > filesize) len = (filesize - pos); + if (blocksize <= 0 || len <= 0) { + ext_cache_fini(&cache); + return -1; + } + blockcnt = lldiv(((len + pos) + blocksize - 1), blocksize); for (i = lldiv(pos, blocksize); i < blockcnt; i++) { |