In the Linux kernel, the following vulnerability has been resolved: filemap: Fix bounds checking in filemap_read() If the caller supplies an iocb->ki_pos value that is close to the filesystem upper limit, and an iterator with a count that causes us to overflow that limit, then filemap_read() enters an infinite loop. This behaviour was discovered when testing xfstests generic/525 with the "localio" optimisation for loopback NFS mounts.
https://git.kernel.org/stable/c/ace149e0830c380ddfce7e466fe860ca502fe4ee
https://git.kernel.org/stable/c/a2746ab3bbc9c6408da5cd072653ec8c24749235
https://git.kernel.org/stable/c/6450e73f4c86d481ac2e22e1bc848d346e140826
https://git.kernel.org/stable/c/26530b757c81f1389fb33ae0357500150933161b