Out of memory error while allocating memory on the stack

[Zittix]

While porting Navit on the iPhone I found a problem in the file_data_read_compressed() function. The buffer var. is allocated on the stack instead on the heap and sometimes it requires more than 1 Mb to be allocated.

Here is the fixed version:

unsigned char * file_data_read_compressed(struct file *file, long long offset, int size, int size_uncomp) {

void *ret; char *buffer=0;

uLongf destLen=size_uncomp; if (file_cache) {

struct file_cache_id id={offset,size,file->name_id,1}; ret=cache_lookup(file_cache,&id); if (ret)

return ret;

ret=cache_insert_new(file_cache,&id,size_uncomp);

} else {

ret=g_malloc(size_uncomp);

} lseek(file->fd, offset, SEEK_SET); buffer=g_malloc(size); if (read(file->fd, buffer, size) != size) {

g_free(ret); ret=NULL;

} else {

if (uncompress_int(ret, &destLen, (Bytef *)buffer, size) != Z_OK) {

dbg(0,"uncompress failed\n"); g_free(ret); ret=NULL;

}

} g_free(buffer); return ret;

}

[Tinloaf]

This has been applied in revision 2187. Thanks for the patch!