From c90e09f7fb498f81cd4e8bb6460d3a26ccebeca3 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 30 Mar 2016 13:13:16 -0700 Subject: [PATCH] f2fs crypto: fix corrupted symlink in encrypted case In the encrypted symlink case, we should check its corrupted symname after decrypting it. Otherwise, we can report -ENOENT incorrectly, if encrypted symname starts with '\0'. Cc: stable 4.5+ Signed-off-by: Jaegeuk Kim --- fs/f2fs/namei.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 7876f1052101..6214d9ec89f2 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -1027,12 +1027,6 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry, goto errout; } - /* this is broken symlink case */ - if (unlikely(cstr.name[0] == 0)) { - res = -ENOENT; - goto errout; - } - if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { /* Symlink data on the disk is corrupted */ res = -EIO; @@ -1046,6 +1040,12 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry, if (res < 0) goto errout; + /* this is broken symlink case */ + if (unlikely(pstr.name[0] == 0)) { + res = -ENOENT; + goto errout; + } + paddr = pstr.name; /* Null-terminate the name */ -- 2.20.1