6:40 a.m.
It's important to keep XATTRs untouched (well, in the same state
they were in when entering the function). Otherwise our
refcounting would be messed up.
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange(a)redhat.com>
---
src/security/security_selinux.c | 40 +++++++++++++++++++++++----------
1 file changed, 28 insertions(+), 12 deletions(-)
diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index 43d2ef32a5..f52c88259d 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -222,10 +222,10 @@ virSecuritySELinuxRecallLabel(const char *path,
}
-static int virSecuritySELinuxSetFileconHelper(const char *path,
+static int virSecuritySELinuxSetFileconHelper(virSecurityManagerPtr mgr,
+ const char *path,
const char *tcon,
bool optional,
- bool privileged,
bool remember);
@@ -252,7 +252,6 @@ virSecuritySELinuxTransactionRun(pid_t pid ATTRIBUTE_UNUSED,
{
virSecuritySELinuxContextListPtr list = opaque;
virSecurityManagerMetadataLockStatePtr state;
- bool privileged = virSecurityManagerGetPrivileged(list->manager);
const char **paths = NULL;
size_t npaths = 0;
size_t i;
@@ -279,10 +278,10 @@ virSecuritySELinuxTransactionRun(pid_t pid ATTRIBUTE_UNUSED,
/* TODO Implement rollback */
if (!item->restore) {
- rv = virSecuritySELinuxSetFileconHelper(item->path,
+ rv = virSecuritySELinuxSetFileconHelper(list->manager,
+ item->path,
item->tcon,
item->optional,
- privileged,
list->lock);
} else {
rv = virSecuritySELinuxRestoreFileLabel(list->manager,
@@ -1303,9 +1302,13 @@ virSecuritySELinuxSetFileconImpl(const char *path, const char
*tcon,
static int
-virSecuritySELinuxSetFileconHelper(const char *path, const char *tcon,
- bool optional, bool privileged, bool remember)
+virSecuritySELinuxSetFileconHelper(virSecurityManagerPtr mgr,
+ const char *path,
+ const char *tcon,
+ bool optional,
+ bool remember)
{
+ bool privileged = virSecurityManagerGetPrivileged(mgr);
security_context_t econ = NULL;
int refcount;
int rc;
@@ -1345,8 +1348,23 @@ virSecuritySELinuxSetFileconHelper(const char *path, const char
*tcon,
}
}
- if (virSecuritySELinuxSetFileconImpl(path, tcon, optional, privileged) < 0)
+ if (virSecuritySELinuxSetFileconImpl(path, tcon, optional, privileged) < 0) {
+ virErrorPtr origerr;
+
+ virErrorPreserveLast(&origerr);
+ /* Try to restore the label. This is done so that XATTRs
+ * are left in the same state as when the control entered
+ * this function. However, if our attempt fails, there's
+ * not much we can do. XATTRs refcounting is fubar'ed and
+ * the only option we have is warn users. */
+ if (virSecuritySELinuxRestoreFileLabel(mgr, path, remember) < 0)
+ VIR_WARN("Unable to restore label on '%s'. "
+ "XATTRs might have been left in inconsistent state.",
+ path);
+
+ virErrorRestore(&origerr);
goto cleanup;
+ }
ret = 0;
cleanup:
@@ -1359,16 +1377,14 @@ static int
virSecuritySELinuxSetFileconOptional(virSecurityManagerPtr mgr,
const char *path, const char *tcon)
{
- bool privileged = virSecurityManagerGetPrivileged(mgr);
- return virSecuritySELinuxSetFileconHelper(path, tcon, true, privileged, false);
+ return virSecuritySELinuxSetFileconHelper(mgr, path, tcon, true, false);
}
static int
virSecuritySELinuxSetFilecon(virSecurityManagerPtr mgr,
const char *path, const char *tcon)
{
- bool privileged = virSecurityManagerGetPrivileged(mgr);
- return virSecuritySELinuxSetFileconHelper(path, tcon, false, privileged, false);
+ return virSecuritySELinuxSetFileconHelper(mgr, path, tcon, false, false);
}
static int
--
2.19.2