This is a note to let you know that I've just added the patch titled
ice: fix theoretical out-of-bounds access in ethtool link modes
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ice-fix-theoretical-out-of-bounds-access-in-ethtool-.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a2cbc5ab7174c5d2d4c7dffb664733452215e4cf
Author: Michal Schmidt <mschmidt@xxxxxxxxxx>
Date: Thu Nov 30 17:58:06 2023 +0100
ice: fix theoretical out-of-bounds access in ethtool link modes
[ Upstream commit 91f9181c738101a276d9da333e0ab665ad806e6d ]
To map phy types reported by the hardware to ethtool link mode bits,
ice uses two lookup tables (phy_type_low_lkup, phy_type_high_lkup).
The "low" table has 64 elements to cover every possible bit the hardware
may report, but the "high" table has only 13. If the hardware reports a
higher bit in phy_types_high, the driver would access memory beyond the
lookup table's end.
Instead of iterating through all 64 bits of phy_types_{low,high}, use
the sizes of the respective lookup tables.
Fixes: 9136e1f1e5c3 ("ice: refactor PHY type to ethtool link mode")
Signed-off-by: Michal Schmidt <mschmidt@xxxxxxxxxx>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@xxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@xxxxxxxxx> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index ad4d4702129f0..9be13e9840917 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -1757,14 +1757,14 @@ ice_phy_type_to_ethtool(struct net_device *netdev,
linkmode_zero(ks->link_modes.supported);
linkmode_zero(ks->link_modes.advertising);
- for (i = 0; i < BITS_PER_TYPE(u64); i++) {
+ for (i = 0; i < ARRAY_SIZE(phy_type_low_lkup); i++) {
if (phy_types_low & BIT_ULL(i))
ice_linkmode_set_bit(&phy_type_low_lkup[i], ks,
req_speeds, advert_phy_type_lo,
i);
}
- for (i = 0; i < BITS_PER_TYPE(u64); i++) {
+ for (i = 0; i < ARRAY_SIZE(phy_type_high_lkup); i++) {
if (phy_types_high & BIT_ULL(i))
ice_linkmode_set_bit(&phy_type_high_lkup[i], ks,
req_speeds, advert_phy_type_hi,
