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[PATCH] AUDIT_FD_PAIR

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Provide an audit record of the descriptor pair returned by pipe() and
socketpair().  Rewritten from the original posted to linux-audit by
John D. Ramsdell <ramsdell@mitre.org>

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2007-02-07 01:48:00 -05:00
parent 6a01b07fae
commit db3495099d
4 changed files with 96 additions and 14 deletions
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40
kernel/auditsc.c
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@ -170,6 +170,11 @@ struct audit_aux_data_sockaddr {
char a[0];
};
struct audit_aux_data_fd_pair {
struct audit_aux_data d;
int fd[2];
};
struct audit_aux_data_path {
struct audit_aux_data d;
struct dentry *dentry;
@ -961,6 +966,11 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
audit_log_d_path(ab, "path=", axi->dentry, axi->mnt);
break; }
case AUDIT_FD_PAIR: {
struct audit_aux_data_fd_pair *axs = (void *)aux;
audit_log_format(ab, "fd0=%d fd1=%d", axs->fd[0], axs->fd[1]);
break; }
}
audit_log_end(ab);
}
@ -1814,6 +1824,36 @@ int audit_socketcall(int nargs, unsigned long *args)
return 0;
}
/**
* __audit_fd_pair - record audit data for pipe and socketpair
* @fd1: the first file descriptor
* @fd2: the second file descriptor
*
* Returns 0 for success or NULL context or < 0 on error.
*/
int __audit_fd_pair(int fd1, int fd2)
{
struct audit_context *context = current->audit_context;
struct audit_aux_data_fd_pair *ax;
if (likely(!context)) {
return 0;
}
ax = kmalloc(sizeof(*ax), GFP_KERNEL);
if (!ax) {
return -ENOMEM;
}
ax->fd[0] = fd1;
ax->fd[1] = fd2;
ax->d.type = AUDIT_FD_PAIR;
ax->d.next = context->aux;
context->aux = (void *)ax;
return 0;
}
/**
* audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto
* @len: data length in user space