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authorDan Carpenter <dan.carpenter@oracle.com>2018-07-04 12:35:56 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-07-26 10:11:09 +0300
commitabbd63bf086d03897569a5a6f56f87e6af222b58 (patch)
treebd11269292388c8e3865bd6321d346c446cc8570
parentd7245d252f55cc790b19b2f9c6ac40cfceab2a79 (diff)
downloadlinux-abbd63bf086d03897569a5a6f56f87e6af222b58.tar.xz
eCryptfs: fix a couple type promotion bugs
commit 0bdf8a8245fdea6f075a5fede833a5fcf1b3466c upstream. ECRYPTFS_SIZE_AND_MARKER_BYTES is type size_t, so if "rc" is negative that gets type promoted to a high positive value and treated as success. Fixes: 778aeb42a708 ("eCryptfs: Cleanup and optimize ecryptfs_lookup_interpose()") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> [tyhicks: Use "if/else if" rather than "if/if"] Cc: stable@vger.kernel.org Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/ecryptfs/crypto.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 91d65f337d87..54bfa71ffdad 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1004,8 +1004,10 @@ int ecryptfs_read_and_validate_header_region(struct inode *inode)
rc = ecryptfs_read_lower(file_size, 0, ECRYPTFS_SIZE_AND_MARKER_BYTES,
inode);
- if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES)
- return rc >= 0 ? -EINVAL : rc;
+ if (rc < 0)
+ return rc;
+ else if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES)
+ return -EINVAL;
rc = ecryptfs_validate_marker(marker);
if (!rc)
ecryptfs_i_size_init(file_size, inode);
@@ -1367,8 +1369,10 @@ int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
ecryptfs_inode_to_lower(inode),
ECRYPTFS_XATTR_NAME, file_size,
ECRYPTFS_SIZE_AND_MARKER_BYTES);
- if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES)
- return rc >= 0 ? -EINVAL : rc;
+ if (rc < 0)
+ return rc;
+ else if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES)
+ return -EINVAL;
rc = ecryptfs_validate_marker(marker);
if (!rc)
ecryptfs_i_size_init(file_size, inode);