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authorAl Viro <viro@zeniv.linux.org.uk>2009-01-04 14:52:57 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2009-01-04 15:14:41 -0500
commit57f71a0af4244d9ba3c0bce74b1d2e66e8d520bd (patch)
treec089a97949fc1d459e137b18739c04e9217913d1
parent157cf649a735a2f7e8dba0ed08e6e38b6c30d886 (diff)
sanitize audit_log_capset()
* no allocations * return void * don't duplicate checked for dummy context Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--include/linux/audit.h9
-rw-r--r--kernel/auditsc.c44
-rw-r--r--kernel/capability.c4
3 files changed, 21 insertions, 36 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h
index bd59cd1e321..7ddcb6a29eb 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -457,7 +457,7 @@ extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
const struct cred *new,
const struct cred *old);
-extern int __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
+extern void __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
{
@@ -504,12 +504,11 @@ static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
return 0;
}
-static inline int audit_log_capset(pid_t pid, const struct cred *new,
+static inline void audit_log_capset(pid_t pid, const struct cred *new,
const struct cred *old)
{
if (unlikely(!audit_dummy_context()))
- return __audit_log_capset(pid, new, old);
- return 0;
+ __audit_log_capset(pid, new, old);
}
extern int audit_n_rules;
@@ -544,7 +543,7 @@ extern int audit_signals;
#define audit_mq_notify(d,n) ((void)0)
#define audit_mq_getsetattr(d,s) ((void)0)
#define audit_log_bprm_fcaps(b, ncr, ocr) ({ 0; })
-#define audit_log_capset(pid, ncr, ocr) ({ 0; })
+#define audit_log_capset(pid, ncr, ocr) ((void)0)
#define audit_ptrace(t) ((void)0)
#define audit_n_rules 0
#define audit_signals 0
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 327e65d5067..c76a58215f5 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -235,6 +235,10 @@ struct audit_context {
mode_t mode;
struct mq_attr attr;
} mq_open;
+ struct {
+ pid_t pid;
+ struct audit_cap_data cap;
+ } capset;
};
int fds[2];
@@ -1291,6 +1295,12 @@ static void show_special(struct audit_context *context, int *call_panic)
attr->mq_flags, attr->mq_maxmsg,
attr->mq_msgsize, attr->mq_curmsgs);
break; }
+ case AUDIT_CAPSET: {
+ audit_log_format(ab, "pid=%d", context->capset.pid);
+ audit_log_cap(ab, "cap_pi", &context->capset.cap.inheritable);
+ audit_log_cap(ab, "cap_pp", &context->capset.cap.permitted);
+ audit_log_cap(ab, "cap_pe", &context->capset.cap.effective);
+ break; }
}
audit_log_end(ab);
}
@@ -1392,14 +1402,6 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
audit_log_cap(ab, "new_pe", &axs->new_pcap.effective);
break; }
- case AUDIT_CAPSET: {
- struct audit_aux_data_capset *axs = (void *)aux;
- audit_log_format(ab, "pid=%d", axs->pid);
- audit_log_cap(ab, "cap_pi", &axs->cap.inheritable);
- audit_log_cap(ab, "cap_pp", &axs->cap.permitted);
- audit_log_cap(ab, "cap_pe", &axs->cap.effective);
- break; }
-
}
audit_log_end(ab);
}
@@ -2456,29 +2458,15 @@ int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
* Record the aguments userspace sent to sys_capset for later printing by the
* audit system if applicable
*/
-int __audit_log_capset(pid_t pid,
+void __audit_log_capset(pid_t pid,
const struct cred *new, const struct cred *old)
{
- struct audit_aux_data_capset *ax;
struct audit_context *context = current->audit_context;
-
- if (likely(!audit_enabled || !context || context->dummy))
- return 0;
-
- ax = kmalloc(sizeof(*ax), GFP_KERNEL);
- if (!ax)
- return -ENOMEM;
-
- ax->d.type = AUDIT_CAPSET;
- ax->d.next = context->aux;
- context->aux = (void *)ax;
-
- ax->pid = pid;
- ax->cap.effective = new->cap_effective;
- ax->cap.inheritable = new->cap_effective;
- ax->cap.permitted = new->cap_permitted;
-
- return 0;
+ context->capset.pid = pid;
+ context->capset.cap.effective = new->cap_effective;
+ context->capset.cap.inheritable = new->cap_effective;
+ context->capset.cap.permitted = new->cap_permitted;
+ context->type = AUDIT_CAPSET;
}
/**
diff --git a/kernel/capability.c b/kernel/capability.c
index 36b4b4daebe..c598d9d5be4 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -280,9 +280,7 @@ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
if (ret < 0)
goto error;
- ret = audit_log_capset(pid, new, current_cred());
- if (ret < 0)
- return ret;
+ audit_log_capset(pid, new, current_cred());
return commit_creds(new);