linux-kernel - include/linux/nfsd/nfsfh.h: NULL dereference

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Date:	Sun, 12 Nov 2006 14:23:10 +0100
From:	Adrian Bunk <bunk@...sta.de>
To:	neilb@....unsw.edu.au
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: include/linux/nfsd/nfsfh.h: NULL dereference

The Coverity checker spotted the following:

<--  snip  -->

...
static __inline__ struct svc_fh *
fh_copy(struct svc_fh *dst, struct svc_fh *src)
{
        if (src->fh_dentry || src->fh_locked) {
                struct dentry *dentry = src->fh_dentry;
                printk(KERN_ERR "fh_copy: copying %s/%s, already verified!\n",
                        dentry->d_parent->d_name.name, dentry->d_name.name);
        }
                        
        *dst = *src;
        return dst;
}
...

<--  snip  -->

src->fh_dentry is being dereferenced when we discover it's NULL...

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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