Re: SIOCETHTOOL ioctl() and a corrupted cmd argument

["Patrick R. McManus" <mcmanus@xxxxxxxxxxxx>]

[Patrick R. McManus: Mar 05 16:00]

> as a regular user I get 
> Mar  5 15:46:57 mcmanus kernel: general ioctl cmd 89F0, magic 8946
> 

turns out, as I had expected, my report is bogus.. this ioctl is a
fallback after the siocethtool fails. the driver do_ioctl() never gets
invoked at all when the ioctl() is invoked without being root.

this would be because in net/core/dev.c dev_ioctl() they are filtered out:

        case SIOCETHTOOL:
        case SIOCGMIIPHY:
        case SIOCGMIIREG:
            if (!capable(CAP_NET_ADMIN))
                return -EPERM;

but SIOCETHTOOL shouldn't need perms, right? it has some functionality
that needs it and some that doesn't, and the driver sorts it
out.. there isn't a GIOCETHTOOL at all..

#define ETHTOOL_GSET        0x00000001 /* Get settings. */
#define ETHTOOL_SSET        0x00000002 /* Set settings, privileged. */