JFFS2 overflow bug in read_dnone

[Victor Gallardo]

Hi,
 
I noticed if I compile with CONFIG_PPC_64K_PAGES, I run into the following issue.
 
******** read_dnode: tn->csize == 0, csize == 65536
******** check_node: tn->csize == 0 <======== BUG_ON assert
 
Look like an OVERFLOW bug. Is this correct?
 
Here is the problem
 
fs/jffs2/nodelist.h
    struct jffs2_tmp_dnode_info
    {
        ...
        uint16_t csize;
        ...
    };
 
fs/jffs2/readinode.c
    static inline int read_dnode(...)
    {
        struct jffs2_tmp_dnode_info *tn;
        uint32_t csize;
        ...
        csize = je32_to_cpu(rd->csize);
        ...
        tn->csize = csize;
  #ifdef DBG_BUG_ON_ASSERT
        if ( tn->csize == 0 && csize != 0) {
                printk("******* %s: tn->csize == 0, csize == %d\n",__func__,csize);
        }
  #endif
        ....
   }
Best Regards,
 
Victor Gallardo