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H A D | 9p.c | d36a5c22 Sat Feb 08 02:24:19 CST 2020 Christian Schoenebeck <qemu_oss@crudebyte.com> 9pfs: validate count sent by client with T_readdir A good 9p client sends T_readdir with "count" parameter that's sufficiently smaller than client's initially negotiated msize (maximum message size). We perform a check for that though to avoid the server to be interrupted with a "Failed to encode VirtFS reply type 41" transport error message by bad clients. This count value constraint uses msize - 11, because 11 is the header size of R_readdir. Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com> Reviewed-by: Greg Kurz <groug@kaod.org> Message-Id: <3990d3891e8ae2074709b56449e96ab4b4b93b7d.1579567020.git.qemu_oss@crudebyte.com> [groug: added comment ] Signed-off-by: Greg Kurz <groug@kaod.org>
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