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| author | Dmitry Kasatkin <d.kasatkin@samsung.com> | 2014-06-27 17:04:27 +0200 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2014-09-08 23:38:57 +0200 |
| commit | b151d6b00bbb798c58f2f21305e7d43fa763f34f (patch) | |
| tree | 3a10265d73d01f900860aa9e7e1faa5c4eab4f4d /security/integrity/ima/ima_appraise.c | |
| parent | evm: prevent passing integrity check if xattr read fails (diff) | |
| download | linux-b151d6b00bbb798c58f2f21305e7d43fa763f34f.tar.xz linux-b151d6b00bbb798c58f2f21305e7d43fa763f34f.zip | |
ima: provide flag to identify new empty files
On ima_file_free(), newly created empty files are not labeled with
an initial security.ima value, because the iversion did not change.
Commit dff6efc "fs: fix iversion handling" introduced a change in
iversion behavior. To verify this change use the shell command:
$ (exec >foo)
$ getfattr -h -e hex -d -m security foo
This patch defines the IMA_NEW_FILE flag. The flag is initially
set, when IMA detects that a new file is created, and subsequently
checked on the ima_file_free() hook to set the initial security.ima
value.
Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> 3.14+
Diffstat (limited to 'security/integrity/ima/ima_appraise.c')
| -rw-r--r-- | security/integrity/ima/ima_appraise.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 86bfd5c5df85..a4605d677248 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -202,8 +202,11 @@ int ima_appraise_measurement(int func, struct integrity_iint_cache *iint, goto out; cause = "missing-hash"; - status = - (inode->i_size == 0) ? INTEGRITY_PASS : INTEGRITY_NOLABEL; + status = INTEGRITY_NOLABEL; + if (inode->i_size == 0) { + iint->flags |= IMA_NEW_FILE; + status = INTEGRITY_PASS; + } goto out; } |