Messages in this thread | | | Subject | Re: [PATCH 07/11] igb: Avoid uninitialized advertised variable in eee_set_cur | From | Jeff Kirsher <> | Date | Tue, 01 Oct 2013 16:10:02 -0700 |
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On Mon, 2013-09-30 at 13:29 -0700, Andi Kleen wrote: > From: Andi Kleen <ak@linux.intel.com> > > eee_get_cur assumes that the output data is already zeroed. It can > read-modify-write the advertised field: > > if (ipcnfg & E1000_IPCNFG_EEE_100M_AN) > 2594 edata->advertised |= ADVERTISED_100baseT_Full; > > This is ok for the normal ethtool eee_get call, which always > zeroes the input data before. > > But eee_set_cur also calls eee_get_cur and it did not zero the input > field. Later on it then compares agsinst the field, which can contain > partial > stack garbage. > > Zero the input field in eee_set_cur() too. > > Cc: jeffrey.t.kirsher@intel.com > Cc: netdev@vger.kernel.org > Signed-off-by: Andi Kleen <ak@linux.intel.com> > --- > drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 ++ > 1 file changed, 2 insertions(+)
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> [unhandled content-type:application/pgp-signature] | |