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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2018-07-04 12:35:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 09:11:09 +0200 |
| commit | abbd63bf086d03897569a5a6f56f87e6af222b58 (patch) | |
| tree | bd11269292388c8e3865bd6321d346c446cc8570 | |
| parent | d7245d252f55cc790b19b2f9c6ac40cfceab2a79 (diff) | |
| download | linux-stable-abbd63bf086d03897569a5a6f56f87e6af222b58.tar.gz linux-stable-abbd63bf086d03897569a5a6f56f87e6af222b58.tar.bz2 linux-stable-abbd63bf086d03897569a5a6f56f87e6af222b58.zip | |
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.c | 12 |
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); |