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    Subject[PATCH] missing copy_from_user check in comx_proto_lapb driver
    Date
    diff -urpN --exclude-from=/home/davej/.exclude bk-linus/drivers/net/wan/comx-proto-lapb.c linux-2.5/drivers/net/wan/comx-proto-lapb.c
    --- bk-linus/drivers/net/wan/comx-proto-lapb.c 2003-05-20 18:41:21.000000000 +0100
    +++ linux-2.5/drivers/net/wan/comx-proto-lapb.c 2003-07-13 06:04:34.000000000 +0100
    @@ -232,7 +232,10 @@ static int comxlapb_write_proc(struct fi
    return -ENOMEM;
    }

    - copy_from_user(page, buffer, count);
    + if (copy_from_user(page, buffer, count)) {
    + free_page((unsigned long)page);
    + return -EFAULT;
    + }
    if (*(page + count - 1) == '\n') {
    *(page + count - 1) = 0;
    }
    -
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