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| author | Dmitry Kasatkin <d.kasatkin@samsung.com> | 2014-08-15 13:49:22 +0300 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2014-09-08 17:36:10 -0400 |
| commit | 1f1009791b2e81f106d4809007720495ba3ed90c (patch) | |
| tree | 83a155c205d0bab7821b2a23ffbe2741c3c19cc4 /security | |
| parent | e7d021e28328e0cc47b21cb9c6d8885326b0c2f5 (diff) | |
| download | linux-exynos-1f1009791b2e81f106d4809007720495ba3ed90c.tar.gz linux-exynos-1f1009791b2e81f106d4809007720495ba3ed90c.tar.bz2 linux-exynos-1f1009791b2e81f106d4809007720495ba3ed90c.zip | |
evm: prevent passing integrity check if xattr read fails
This patch fixes a bug, where evm_verify_hmac() returns INTEGRITY_PASS
if inode->i_op->getxattr() returns an error in evm_find_protected_xattrs.
Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/integrity/evm/evm_main.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index fb71f55295dc..40220124364c 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -126,14 +126,15 @@ static enum integrity_status evm_verify_hmac(struct dentry *dentry, rc = vfs_getxattr_alloc(dentry, XATTR_NAME_EVM, (char **)&xattr_data, 0, GFP_NOFS); if (rc <= 0) { - if (rc == 0) - evm_status = INTEGRITY_FAIL; /* empty */ - else if (rc == -ENODATA) { + evm_status = INTEGRITY_FAIL; + if (rc == -ENODATA) { rc = evm_find_protected_xattrs(dentry); if (rc > 0) evm_status = INTEGRITY_NOLABEL; else if (rc == 0) evm_status = INTEGRITY_NOXATTRS; /* new file */ + } else if (rc == -EOPNOTSUPP) { + evm_status = INTEGRITY_UNKNOWN; } goto out; } |