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    SubjectRe: [PATCH v5 3.1.0-rc4-tip 3/26] Uprobes: register/unregister probes.
    * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> [2011-09-20 17:50:19]:

    > On Tue, Sep 20, 2011 at 05:30:22PM +0530, Srikar Dronamraju wrote:
    > > +int register_uprobe(struct inode *inode, loff_t offset,
    > > + struct uprobe_consumer *consumer)
    > > +{
    > > + struct uprobe *uprobe;
    > > + int ret = 0;
    > > +
    > > + inode = igrab(inode);
    > > + if (!inode || !consumer || consumer->next)
    > > + return -EINVAL;
    > > +
    > > + if (offset > inode->i_size)
    > > + return -EINVAL;
    > > +
    > > + mutex_lock(&inode->i_mutex);
    > > + uprobe = alloc_uprobe(inode, offset);
    > > + if (!uprobe)
    > > + return -ENOMEM;
    >
    > The error returns above don't iput(inode). And inode->i_mutex stays
    > locked on this return.

    Yes will fix this .. by clubbing the !uprobe with the next condition.
    Thanks for pointing this.

    >
    > > +void unregister_uprobe(struct inode *inode, loff_t offset,
    > > + struct uprobe_consumer *consumer)
    > > +{
    > > + struct uprobe *uprobe;
    > > +
    > > + inode = igrab(inode);
    > > + if (!inode || !consumer)
    > > + return;
    > > +
    > > + if (offset > inode->i_size)
    > > + return;
    > > +
    > > + uprobe = find_uprobe(inode, offset);
    > > + if (!uprobe)
    > > + return;
    > > +
    > > + if (!del_consumer(uprobe, consumer)) {
    > > + put_uprobe(uprobe);
    > > + return;
    > > + }
    >
    > More returns that do not iput(inode).

    Yes. will fix these too.

    --
    Thanks and Regards
    Srikar


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