f2fs crypto: handle unexpected lack of encryption keys
This patch syncs f2fs with commit abdd438b26b4 ("ext4 crypto: handle
unexpected lack of encryption keys") from ext4.
Fix up attempts by users to try to write to a file when they don't
have access to the encryption key.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/crypto_policy.c b/fs/f2fs/crypto_policy.c
index d4a96af..596f024 100644
--- a/fs/f2fs/crypto_policy.c
+++ b/fs/f2fs/crypto_policy.c
@@ -192,7 +192,8 @@
return res;
ci = F2FS_I(parent)->i_crypt_info;
- BUG_ON(ci == NULL);
+ if (ci == NULL)
+ return -ENOKEY;
ctx.format = F2FS_ENCRYPTION_CONTEXT_FORMAT_V1;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 05f5f2f..8dea195 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -424,6 +424,8 @@
err = f2fs_get_encryption_info(inode);
if (err)
return 0;
+ if (!f2fs_encrypted_inode(inode))
+ return -ENOKEY;
}
/* we don't need to use inline_data strictly */
@@ -443,7 +445,9 @@
if (!ret && f2fs_encrypted_inode(inode)) {
ret = f2fs_get_encryption_info(inode);
if (ret)
- ret = -EACCES;
+ return -EACCES;
+ if (!f2fs_encrypted_inode(inode))
+ return -ENOKEY;
}
return ret;
}