#include <linux/list.h>
#include <linux/tty.h>
#include <linux/selinux.h>
+#include <linux/binfmts.h>
#include "audit.h"
uid_t uid;
gid_t gid;
dev_t rdev;
- char *ctx;
+ u32 osid;
};
struct audit_aux_data {
uid_t uid;
gid_t gid;
mode_t mode;
- char *ctx;
+ u32 osid;
+};
+
+struct audit_aux_data_execve {
+ struct audit_aux_data d;
+ int argc;
+ int envc;
+ char mem[0];
};
struct audit_aux_data_socketcall {
struct audit_context *ctx,
enum audit_state *state)
{
- int i, j;
+ int i, j, need_sid = 1;
u32 sid;
- selinux_task_ctxid(tsk, &sid);
-
for (i = 0; i < rule->field_count; i++) {
struct audit_field *f = &rule->fields[i];
int result = 0;
match for now to avoid losing information that
may be wanted. An error message will also be
logged upon error */
- if (f->se_rule)
+ if (f->se_rule) {
+ if (need_sid) {
+ selinux_task_ctxid(tsk, &sid);
+ need_sid = 0;
+ }
result = selinux_audit_rule_match(sid, f->type,
f->op,
f->se_rule,
ctx);
+ }
break;
case AUDIT_ARG0:
case AUDIT_ARG1:
#endif
for (i = 0; i < context->name_count; i++) {
- char *p = context->names[i].ctx;
- context->names[i].ctx = NULL;
- kfree(p);
if (context->names[i].name)
__putname(context->names[i].name);
}
dput(axi->dentry);
mntput(axi->mnt);
}
- if ( aux->type == AUDIT_IPC ) {
- struct audit_aux_data_ipcctl *axi = (void *)aux;
- if (axi->ctx)
- kfree(axi->ctx);
- }
context->aux = aux->next;
kfree(aux);
static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
{
- int i;
+ int i, call_panic = 0;
struct audit_buffer *ab;
struct audit_aux_data *aux;
const char *tty;
case AUDIT_IPC: {
struct audit_aux_data_ipcctl *axi = (void *)aux;
audit_log_format(ab,
- " qbytes=%lx iuid=%u igid=%u mode=%x obj=%s",
- axi->qbytes, axi->uid, axi->gid, axi->mode, axi->ctx);
+ " qbytes=%lx iuid=%u igid=%u mode=%x",
+ axi->qbytes, axi->uid, axi->gid, axi->mode);
+ if (axi->osid != 0) {
+ char *ctx = NULL;
+ u32 len;
+ if (selinux_ctxid_to_string(
+ axi->osid, &ctx, &len)) {
+ audit_log_format(ab, " osid=%u",
+ axi->osid);
+ call_panic = 1;
+ } else
+ audit_log_format(ab, " obj=%s", ctx);
+ kfree(ctx);
+ }
+ break; }
+
+ case AUDIT_IPC_SET_PERM: {
+ struct audit_aux_data_ipcctl *axi = (void *)aux;
+ audit_log_format(ab,
+ " new qbytes=%lx new iuid=%u new igid=%u new mode=%x",
+ axi->qbytes, axi->uid, axi->gid, axi->mode);
+ if (axi->osid != 0) {
+ char *ctx = NULL;
+ u32 len;
+ if (selinux_ctxid_to_string(
+ axi->osid, &ctx, &len)) {
+ audit_log_format(ab, " osid=%u",
+ axi->osid);
+ call_panic = 1;
+ } else
+ audit_log_format(ab, " obj=%s", ctx);
+ kfree(ctx);
+ }
+ break; }
+ case AUDIT_EXECVE: {
+ struct audit_aux_data_execve *axi = (void *)aux;
+ int i;
+ const char *p;
+ for (i = 0, p = axi->mem; i < axi->argc; i++) {
+ audit_log_format(ab, "a%d=", i);
+ p = audit_log_untrustedstring(ab, p);
+ audit_log_format(ab, "\n");
+ }
break; }
case AUDIT_SOCKETCALL: {
context->names[i].gid,
MAJOR(context->names[i].rdev),
MINOR(context->names[i].rdev));
- if (context->names[i].ctx) {
- audit_log_format(ab, " obj=%s",
- context->names[i].ctx);
+ if (context->names[i].osid != 0) {
+ char *ctx = NULL;
+ u32 len;
+ if (selinux_ctxid_to_string(
+ context->names[i].osid, &ctx, &len)) {
+ audit_log_format(ab, " osid=%u",
+ context->names[i].osid);
+ call_panic = 2;
+ } else
+ audit_log_format(ab, " obj=%s", ctx);
+ kfree(ctx);
}
audit_log_end(ab);
}
+ if (call_panic)
+ audit_panic("error converting sid to string");
}
/**
#endif
}
-void audit_inode_context(int idx, const struct inode *inode)
+static void audit_inode_context(int idx, const struct inode *inode)
{
struct audit_context *context = current->audit_context;
- const char *suffix = security_inode_xattr_getsuffix();
- char *ctx = NULL;
- int len = 0;
- if (!suffix)
- goto ret;
-
- len = security_inode_getsecurity(inode, suffix, NULL, 0, 0);
- if (len == -EOPNOTSUPP)
- goto ret;
- if (len < 0)
- goto error_path;
-
- ctx = kmalloc(len, GFP_KERNEL);
- if (!ctx)
- goto error_path;
-
- len = security_inode_getsecurity(inode, suffix, ctx, len, 0);
- if (len < 0)
- goto error_path;
-
- kfree(context->names[idx].ctx);
- context->names[idx].ctx = ctx;
- goto ret;
-
-error_path:
- if (ctx)
- kfree(ctx);
- audit_panic("error in audit_inode_context");
-ret:
- return;
+ selinux_get_inode_sid(inode, &context->names[idx].osid);
}
return ctx ? ctx->loginuid : -1;
}
-static char *audit_ipc_context(struct kern_ipc_perm *ipcp)
+/**
+ * audit_ipc_obj - record audit data for ipc object
+ * @ipcp: ipc permissions
+ *
+ * Returns 0 for success or NULL context or < 0 on error.
+ */
+int audit_ipc_obj(struct kern_ipc_perm *ipcp)
{
+ struct audit_aux_data_ipcctl *ax;
struct audit_context *context = current->audit_context;
- char *ctx = NULL;
- int len = 0;
if (likely(!context))
- return NULL;
-
- len = security_ipc_getsecurity(ipcp, NULL, 0);
- if (len == -EOPNOTSUPP)
- goto ret;
- if (len < 0)
- goto error_path;
-
- ctx = kmalloc(len, GFP_ATOMIC);
- if (!ctx)
- goto error_path;
+ return 0;
- len = security_ipc_getsecurity(ipcp, ctx, len);
- if (len < 0)
- goto error_path;
+ ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+ if (!ax)
+ return -ENOMEM;
- return ctx;
+ ax->uid = ipcp->uid;
+ ax->gid = ipcp->gid;
+ ax->mode = ipcp->mode;
+ selinux_get_ipc_sid(ipcp, &ax->osid);
-error_path:
- kfree(ctx);
- audit_panic("error in audit_ipc_context");
-ret:
- return NULL;
+ ax->d.type = AUDIT_IPC;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
}
/**
- * audit_ipc_perms - record audit data for ipc
+ * audit_ipc_set_perm - record audit data for new ipc permissions
* @qbytes: msgq bytes
* @uid: msgq user id
* @gid: msgq group id
*
* Returns 0 for success or NULL context or < 0 on error.
*/
-int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode, struct kern_ipc_perm *ipcp)
+int audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode, struct kern_ipc_perm *ipcp)
{
struct audit_aux_data_ipcctl *ax;
struct audit_context *context = current->audit_context;
ax->uid = uid;
ax->gid = gid;
ax->mode = mode;
- ax->ctx = audit_ipc_context(ipcp);
+ selinux_get_ipc_sid(ipcp, &ax->osid);
- ax->d.type = AUDIT_IPC;
+ ax->d.type = AUDIT_IPC_SET_PERM;
ax->d.next = context->aux;
context->aux = (void *)ax;
return 0;
}
+int audit_bprm(struct linux_binprm *bprm)
+{
+ struct audit_aux_data_execve *ax;
+ struct audit_context *context = current->audit_context;
+ unsigned long p, next;
+ void *to;
+
+ if (likely(!audit_enabled || !context))
+ return 0;
+
+ ax = kmalloc(sizeof(*ax) + PAGE_SIZE * MAX_ARG_PAGES - bprm->p,
+ GFP_KERNEL);
+ if (!ax)
+ return -ENOMEM;
+
+ ax->argc = bprm->argc;
+ ax->envc = bprm->envc;
+ for (p = bprm->p, to = ax->mem; p < MAX_ARG_PAGES*PAGE_SIZE; p = next) {
+ struct page *page = bprm->page[p / PAGE_SIZE];
+ void *kaddr = kmap(page);
+ next = (p + PAGE_SIZE) & ~(PAGE_SIZE - 1);
+ memcpy(to, kaddr + (p & (PAGE_SIZE - 1)), next - p);
+ to += next - p;
+ kunmap(page);
+ }
+
+ ax->d.type = AUDIT_EXECVE;
+ ax->d.next = context->aux;
+ context->aux = (void *)ax;
+ return 0;
+}
+
+
/**
* audit_socketcall - record audit data for sys_socketcall
* @nargs: number of args
projects / linux-2.6-omap-h63xx.git / blobdiff