• Simon Derr's avatar
    net/9p: Check errno validity · 43def35c
    Simon Derr authored
    While working on a modified server I had the Linux clients crash
    a few times. This lead me to find this:
    Some error codes are directly extracted from the server replies.
    A malformed server reply could contain an invalid error code, with a
    very large value. If this value is then passed to ERR_PTR() it will
    not be properly detected as an error code by IS_ERR() and as a result
    the kernel will dereference an invalid pointer.
    This patch tries to avoid this.
    Signed-off-by: default avatarSimon Derr <simon.derr@bull.net>
    Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
client.c 51.4 KB