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SubjectRe: [PATCH] fix an endianness bug in ext4_encrypted_follow_link()
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(cc'ing Julia Lawall)

On Thu, 2015-11-26 at 15:27 +0000, Al Viro wrote:
> applying le32_to_cpu() to 16bit value is a bad idea...

Julia, perhaps you or your crew could produce a coccinelle test
for this class of error?

> diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
> index abe2401..e8e7af6 100644
> --- a/fs/ext4/symlink.c
> +++ b/fs/ext4/symlink.c
> @@ -52,7 +52,7 @@ static const char *ext4_encrypted_follow_link(struct dentry *dentry, void **cook
> /* Symlink is encrypted */
> sd = (struct ext4_encrypted_symlink_data *)caddr;
> cstr.name = sd->encrypted_path;
> - cstr.len = le32_to_cpu(sd->len);
> + cstr.len = le16_to_cpu(sd->len);
> if ((cstr.len +
> sizeof(struct ext4_encrypted_symlink_data) - 1) >
> max_size) {



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