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Try #1: Bug fix for the buffers

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This commit is contained in:
Gerard Wagener 2010-01-14 14:38:46 +01:00
parent 1e178854a5
commit a644bbe929
3 changed files with 38 additions and 27 deletions
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2
aha/aha.cfg
View file

@ -4,7 +4,7 @@ sleeptime=3
#The treshold that is taken into account to decide whether the file should be
#removed or not
timeout=3
logfile=/home/gerard/kernel/linux-2.6/aha/aha.log
logfile=/home/gerard/kernel/adaptive-honeypot/linux-2.6/aha/aha.log
[common]
#Directory where the kernel writes data

60
arch/um/kernel/aha.c
View file

@ -20,35 +20,46 @@ int aha_create_filename(char *fn, int size)
return snprintf(fn,size,"AHA_%lx.dat",ncycles);
}
/* Internal function for aha_dump_execve */
inline void __aha_os_write_file_ck(int fd, char* buf, int cnt)
/* Internal function for aha_dump_execve
*
* int fd Open file descritor
* char buf Buffer that should be written in the file descritor
* int cnt The number that should be written
* int size Size of the buffer
*/
inline void __aha_os_write_file_ck(int fd, char* buf, int size, int cnt)
{
if ((cnt > 0) & (cnt < MAX_DUMP_BUF)){
if ((cnt > 0) & (cnt < size)){
os_write_file(fd,buf,cnt);
} else {
AHA_PRINTK("Failed to write information\n");
}
}
/* Log PIDs and PPID */
inline void __aha_dump_pid_ppids(int fd,char* buf,int cnt)
/* Log PIDs and PPID
* int fd Open file descriptor
* char buff A buffer for storing the messages
* int size The buffer size
*/
inline void __aha_dump_pid_ppids(int fd, char* buf, int size)
{
struct task_struct *tsk;
int cnt;
tsk = current;
cnt = snprintf(buf,MAX_DUMP_BUF,"pid=%d\n",tsk->pid);
__aha_os_write_file_ck(fd,buf,cnt);
cnt = snprintf(buf,MAX_DUMP_BUF,"ppid=%d\n",tsk->parent->pid);
__aha_os_write_file_ck(fd,buf,cnt);
cnt = snprintf(buf,MAX_DUMP_BUF,"rppid=%d\n",tsk->real_parent->pid);
__aha_os_write_file_ck(fd,buf,cnt);
cnt = snprintf(buf,size,"pid=%d\n",tsk->pid);
__aha_os_write_file_ck(fd,buf,size,cnt);
cnt = snprintf(buf,size,"ppid=%d\n",tsk->parent->pid);
__aha_os_write_file_ck(fd,buf,size,cnt);
cnt = snprintf(buf,size,"rppid=%d\n",tsk->real_parent->pid);
__aha_os_write_file_ck(fd,buf,size,cnt);
}
inline void __aha_set_done_tag(int fd, char* buf,int cnt)
inline void __aha_set_done_tag(int fd, char* buf,int size)
{
int cnt;
/* FIXME the MAGIC word is not escaped it could emerge as argument */
/* FIXME Wrong type is used */
cnt = snprintf(buf,cnt,"DONE=1\n");
__aha_os_write_file_ck(fd,buf,cnt);
cnt = snprintf(buf,size,"DONE=1\n");
__aha_os_write_file_ck(fd,buf,size,cnt);
}
@ -57,7 +68,7 @@ inline void __aha_set_type_tag(int fd, char* buf,int size,int tag)
int cnt; /* May break inline but makes code more readable */
/* FIXME Espacing is not done */
cnt = snprintf(buf,size,"type=%d\n",tag);
__aha_os_write_file_ck(fd,buf,cnt);
__aha_os_write_file_ck(fd,buf,size,cnt);
}
@ -88,17 +99,15 @@ char* aha_dump_execve(char __user *file, char __user *__user *argv,
return NULL;
if (aha_create_filename(r,MAX_DUMP_BUF)<0)
return NULL;
/* Go into output queue */
/* Go into output queue */
cnt=snprintf(p,MAX_DUMP_BUF,"out/%s",r);
if ((cnt<0) | (cnt>MAX_DUMP_BUF))
return NULL;
if ((fd = os_open_file(p,flg,mode))<0)
return NULL;
/* Dump the file from execve */
if (strncpy_from_user(p,file,MAX_DUMP_BUF) > 0){
cnt = snprintf((char*)q,MAX_DUMP_BUF,"file=%s\n",p);
__aha_os_write_file_ck(fd,q,cnt);
__aha_os_write_file_ck(fd,q,MAX_DUMP_BUF,cnt);
}
/* Dump the arguments */
for (;;) {
@ -108,12 +117,12 @@ char* aha_dump_execve(char __user *file, char __user *__user *argv,
break;
if (strncpy_from_user(p,a, MAX_DUMP_BUF) > 0) {
cnt=snprintf(q,MAX_DUMP_BUF,"argument=%s\n",p);
__aha_os_write_file_ck(fd,q,cnt);
__aha_os_write_file_ck(fd,q,MAX_DUMP_BUF,cnt);
}
argv++;
}
__aha_dump_pid_ppids(fd,q,cnt);
__aha_set_done_tag(fd,q,cnt);
__aha_dump_pid_ppids(fd,q,MAX_DUMP_BUF);
__aha_set_done_tag(fd,q,MAX_DUMP_BUF);
os_close_file(fd);
kfree(p);
kfree(q);
@ -204,9 +213,10 @@ void aha_record_sys_clone(int pid, int ppid)
if (fd > 0){
__aha_set_type_tag(fd,(char*)&buf,buf__size,EXECVE_MESSAGE);
cnt = snprintf((char*)&buf,buf__size,"pid=%d\n",pid);
__aha_os_write_file_ck(fd,buf,cnt);
__aha_os_write_file_ck(fd,buf,buf__size,cnt);
cnt = snprintf((char*)&buf,buf__size,"ppid=%d\n",ppid);
__aha_set_done_tag(fd,(char*)&buf,cnt);
__aha_os_write_file_ck(fd,(char*)&buf,buf__size,cnt);
__aha_set_done_tag(fd,(char*)&buf,buf__size);
os_close_file(fd);
}else{
AHA_PRINTK("rec_sys_clone: Failed to open file %s\n",buf);

3
arch/um/sys-i386/syscalls.c
View file

@ -10,6 +10,7 @@
#include "asm/mman.h"
#include "asm/uaccess.h"
#include "asm/unistd.h"
#include "shared/aha.h"
/*
* Perform the select(nd, in, out, ex, tv) and mmap() system
@ -81,7 +82,7 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp,
current->thread.forking = 1;
ret = do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
child_tid);
printk("Process %d created %d\n",current->pid,ret);
aha_record_sys_clone(ret,(int)current->pid);
current->thread.forking = 0;
return ret;
}