mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
sanitize audit_mq_open()
* don't bother with allocations * don't do double copy_from_user() * don't duplicate parts of check for audit_dummy_context() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
c32c8af43b
commit
564f6993ff
@ -450,7 +450,7 @@ extern void audit_socketcall(int nargs, unsigned long *args);
|
||||
extern int audit_sockaddr(int len, void *addr);
|
||||
extern int __audit_fd_pair(int fd1, int fd2);
|
||||
extern int audit_set_macxattr(const char *name);
|
||||
extern int __audit_mq_open(int oflag, mode_t mode, struct mq_attr __user *u_attr);
|
||||
extern void __audit_mq_open(int oflag, mode_t mode, struct mq_attr *attr);
|
||||
extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
|
||||
extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
|
||||
extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
|
||||
@ -475,11 +475,10 @@ static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid
|
||||
if (unlikely(!audit_dummy_context()))
|
||||
__audit_ipc_set_perm(qbytes, uid, gid, mode);
|
||||
}
|
||||
static inline int audit_mq_open(int oflag, mode_t mode, struct mq_attr __user *u_attr)
|
||||
static inline void audit_mq_open(int oflag, mode_t mode, struct mq_attr *attr)
|
||||
{
|
||||
if (unlikely(!audit_dummy_context()))
|
||||
return __audit_mq_open(oflag, mode, u_attr);
|
||||
return 0;
|
||||
__audit_mq_open(oflag, mode, attr);
|
||||
}
|
||||
static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
|
||||
{
|
||||
@ -541,7 +540,7 @@ extern int audit_signals;
|
||||
#define audit_fd_pair(n,a) ({ 0; })
|
||||
#define audit_sockaddr(len, addr) ({ 0; })
|
||||
#define audit_set_macxattr(n) do { ; } while (0)
|
||||
#define audit_mq_open(o,m,a) ({ 0; })
|
||||
#define audit_mq_open(o,m,a) ((void)0)
|
||||
#define audit_mq_sendrecv(d,l,p,t) ((void)0)
|
||||
#define audit_mq_notify(d,n) ((void)0)
|
||||
#define audit_mq_getsetattr(d,s) ((void)0)
|
||||
|
||||
23
ipc/mqueue.c
23
ipc/mqueue.c
@ -588,22 +588,18 @@ static int mq_attr_ok(struct mq_attr *attr)
|
||||
* Invoked when creating a new queue via sys_mq_open
|
||||
*/
|
||||
static struct file *do_create(struct dentry *dir, struct dentry *dentry,
|
||||
int oflag, mode_t mode, struct mq_attr __user *u_attr)
|
||||
int oflag, mode_t mode, struct mq_attr *attr)
|
||||
{
|
||||
const struct cred *cred = current_cred();
|
||||
struct mq_attr attr;
|
||||
struct file *result;
|
||||
int ret;
|
||||
|
||||
if (u_attr) {
|
||||
ret = -EFAULT;
|
||||
if (copy_from_user(&attr, u_attr, sizeof(attr)))
|
||||
goto out;
|
||||
if (attr) {
|
||||
ret = -EINVAL;
|
||||
if (!mq_attr_ok(&attr))
|
||||
if (!mq_attr_ok(attr))
|
||||
goto out;
|
||||
/* store for use during create */
|
||||
dentry->d_fsdata = &attr;
|
||||
dentry->d_fsdata = attr;
|
||||
}
|
||||
|
||||
mode &= ~current->fs->umask;
|
||||
@ -660,11 +656,13 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
|
||||
struct dentry *dentry;
|
||||
struct file *filp;
|
||||
char *name;
|
||||
struct mq_attr attr;
|
||||
int fd, error;
|
||||
|
||||
error = audit_mq_open(oflag, mode, u_attr);
|
||||
if (error != 0)
|
||||
return error;
|
||||
if (u_attr && copy_from_user(&attr, u_attr, sizeof(struct mq_attr)))
|
||||
return -EFAULT;
|
||||
|
||||
audit_mq_open(oflag, mode, u_attr ? &attr : NULL);
|
||||
|
||||
if (IS_ERR(name = getname(u_name)))
|
||||
return PTR_ERR(name);
|
||||
@ -690,7 +688,8 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
|
||||
filp = do_open(dentry, oflag);
|
||||
} else {
|
||||
filp = do_create(mqueue_mnt->mnt_root, dentry,
|
||||
oflag, mode, u_attr);
|
||||
oflag, mode,
|
||||
u_attr ? &attr : NULL);
|
||||
}
|
||||
} else {
|
||||
error = -ENOENT;
|
||||
|
||||
@ -124,13 +124,6 @@ struct audit_aux_data {
|
||||
/* Number of target pids per aux struct. */
|
||||
#define AUDIT_AUX_PIDS 16
|
||||
|
||||
struct audit_aux_data_mq_open {
|
||||
struct audit_aux_data d;
|
||||
int oflag;
|
||||
mode_t mode;
|
||||
struct mq_attr attr;
|
||||
};
|
||||
|
||||
struct audit_aux_data_execve {
|
||||
struct audit_aux_data d;
|
||||
int argc;
|
||||
@ -242,6 +235,11 @@ struct audit_context {
|
||||
unsigned int msg_prio;
|
||||
struct timespec abs_timeout;
|
||||
} mq_sendrecv;
|
||||
struct {
|
||||
int oflag;
|
||||
mode_t mode;
|
||||
struct mq_attr attr;
|
||||
} mq_open;
|
||||
};
|
||||
|
||||
#if AUDIT_DEBUG
|
||||
@ -1263,6 +1261,16 @@ static void show_special(struct audit_context *context, int *call_panic)
|
||||
return;
|
||||
}
|
||||
break; }
|
||||
case AUDIT_MQ_OPEN: {
|
||||
audit_log_format(ab,
|
||||
"oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld "
|
||||
"mq_msgsize=%ld mq_curmsgs=%ld",
|
||||
context->mq_open.oflag, context->mq_open.mode,
|
||||
context->mq_open.attr.mq_flags,
|
||||
context->mq_open.attr.mq_maxmsg,
|
||||
context->mq_open.attr.mq_msgsize,
|
||||
context->mq_open.attr.mq_curmsgs);
|
||||
break; }
|
||||
case AUDIT_MQ_SENDRECV: {
|
||||
audit_log_format(ab,
|
||||
"mqdes=%d msg_len=%zd msg_prio=%u "
|
||||
@ -1368,15 +1376,6 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
|
||||
continue; /* audit_panic has been called */
|
||||
|
||||
switch (aux->type) {
|
||||
case AUDIT_MQ_OPEN: {
|
||||
struct audit_aux_data_mq_open *axi = (void *)aux;
|
||||
audit_log_format(ab,
|
||||
"oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld "
|
||||
"mq_msgsize=%ld mq_curmsgs=%ld",
|
||||
axi->oflag, axi->mode, axi->attr.mq_flags,
|
||||
axi->attr.mq_maxmsg, axi->attr.mq_msgsize,
|
||||
axi->attr.mq_curmsgs);
|
||||
break; }
|
||||
|
||||
case AUDIT_EXECVE: {
|
||||
struct audit_aux_data_execve *axi = (void *)aux;
|
||||
@ -2135,38 +2134,20 @@ int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
|
||||
* @mode: mode bits
|
||||
* @u_attr: queue attributes
|
||||
*
|
||||
* Returns 0 for success or NULL context or < 0 on error.
|
||||
*/
|
||||
int __audit_mq_open(int oflag, mode_t mode, struct mq_attr __user *u_attr)
|
||||
void __audit_mq_open(int oflag, mode_t mode, struct mq_attr *attr)
|
||||
{
|
||||
struct audit_aux_data_mq_open *ax;
|
||||
struct audit_context *context = current->audit_context;
|
||||
|
||||
if (!audit_enabled)
|
||||
return 0;
|
||||
if (attr)
|
||||
memcpy(&context->mq_open.attr, attr, sizeof(struct mq_attr));
|
||||
else
|
||||
memset(&context->mq_open.attr, 0, sizeof(struct mq_attr));
|
||||
|
||||
if (likely(!context))
|
||||
return 0;
|
||||
context->mq_open.oflag = oflag;
|
||||
context->mq_open.mode = mode;
|
||||
|
||||
ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
|
||||
if (!ax)
|
||||
return -ENOMEM;
|
||||
|
||||
if (u_attr != NULL) {
|
||||
if (copy_from_user(&ax->attr, u_attr, sizeof(ax->attr))) {
|
||||
kfree(ax);
|
||||
return -EFAULT;
|
||||
}
|
||||
} else
|
||||
memset(&ax->attr, 0, sizeof(ax->attr));
|
||||
|
||||
ax->oflag = oflag;
|
||||
ax->mode = mode;
|
||||
|
||||
ax->d.type = AUDIT_MQ_OPEN;
|
||||
ax->d.next = context->aux;
|
||||
context->aux = (void *)ax;
|
||||
return 0;
|
||||
context->type = AUDIT_MQ_OPEN;
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
Loading…
Reference in New Issue
Block a user