REDHAT-BUG-315051

First published: Tue Oct 02 2007(Updated: )

Due issue described in <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED DUPLICATE - O_ATOMICLOOKUP vs O_CLOEXEC(mainstream kernels) incompatibility" href="show_bug.cgi?id=313681">https://bugzilla.redhat.com/show_bug.cgi?id=313681</a> open(O_ATOMICLOOKUP) leaks the dentry on the filesystems where d_revalidate is implemented. i.e open ("/proc/self/exe", O_RDONLY); open ("/proc/self/exe", O_RDONLY | 02000000); leaks one dentry. By this way it's possible to eat all the memory on the node or overflow dentry-&gt;d_count. Both RHEL4 and RHEL5 kernels are vulnerabled Acknowledgements: Red Hat would like to credit Vasily Averin for reporting this issue.

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