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Change History

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.

kernel.org https://git.kernel.org/stable/c/26530b757c81f1389fb33ae0357500150933161b [No types assigned]

kernel.org https://git.kernel.org/stable/c/6450e73f4c86d481ac2e22e1bc848d346e140826 [No types assigned]

kernel.org https://git.kernel.org/stable/c/a2746ab3bbc9c6408da5cd072653ec8c24749235 [No types assigned]

kernel.org https://git.kernel.org/stable/c/ace149e0830c380ddfce7e466fe860ca502fe4ee [No types assigned]