Date: Fri, 15 Jul 2011 13:05:08 -0400 (EDT) From: Josh Bressers <bressers@...hat.com> To: oss-security@...ts.openwall.com Cc: "Steven M. Christey" <coley@...us.mitre.org> Subject: Re: CVE Request -- kernel: ext4: kernel panic when writing data to the last block of sparse file Please use CVE-2011-2695. Thanks. -- JB ----- Original Message ----- > If an extent exists which includes the block right before the maximum > file offset, and the block for the maximum file offset is written, > the kernel panics. For 4KB block size, the problem only occurs on > x86_64 architecture. For 1KB or 2KB block size, the problem occurs on > both i386 and x86_64. > > Local unprivileged users can use this flaw to crash the system when > ext4 > filesystem is in use. > > Upstream fix: > f17722f917b2f21497deb6edc62fb1683daa08e6 > > References: > https://bugzilla.redhat.com/show_bug.cgi?id=722557 > http://www.spinics.net/lists/linux-ext4/msg25697.html > > Thanks, > -- > Petr Matousek / Red Hat Security Response Team
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