Date: Tue, 24 Nov 2009 13:06:51 -0500 (EST) 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: fuse: prevent fuse_put_request on invalid pointer Please use CVE-2009-4021 Thanks. -- JB ----- "Eugene Teo" <eugeneteo@...nel.sg> wrote: > "fuse_direct_io() has a loop where requests are allocated in each > iteration. if allocation fails, the loop is broken out and follows > into > an unconditional fuse_put_request() on that invalid pointer." > > Upstream commit: > http://git.kernel.org/linus/f60311d5f7670d9539b424e4ed8b5c0872fc9e83 > > This can be triggered when the system is low on memory, and when the > fuse_request_alloc() function called from fuse_get_req() fails. The > fuse_put_request() function will then dereference the invalid pointer > > returned, resulting in a kernel oops. > > This was introduced in 413ef8cb (v2.6.14-rc1) and fixed in > v2.6.32-rc7. > > https://bugzilla.redhat.com/538734 > > Thanks, Eugene
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