[Intel-wired-lan] [PATCH][next] ice: Fix potential infinite loop when using u8 loop counter

[Brelinski, TonyX]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
> Colin King
> Sent: Wednesday, March 31, 2021 7:46 AM
> To: Brandeburg, Jesse <jesse.brandeburg at intel.com>; Nguyen, Anthony L
> <anthony.l.nguyen at intel.com>; David S . Miller <davem at davemloft.net>;
> Jakub Kicinski <kuba at kernel.org>; Cao, Chinh T <chinh.t.cao at intel.com>;
> intel-wired-lan at lists.osuosl.org; netdev at vger.kernel.org
> Cc: kernel-janitors at vger.kernel.org; linux-kernel at vger.kernel.org
> Subject: [Intel-wired-lan] [PATCH][next] ice: Fix potential infinite loop when
> using u8 loop counter
> 
> From: Colin Ian King <colin.king at canonical.com>
> 
> A for-loop is using a u8 loop counter that is being compared to a u32
> cmp_dcbcfg->numapp to check for the end of the loop. If cmp_dcbcfg-
> >numapp is larger than 255 then the counter j will wrap around to zero and
> hence an infinite loop occurs. Fix this by making counter j the same type as
> cmp_dcbcfg->numapp.
> 
> Addresses-Coverity: ("Infinite loop")
> Fixes: aeac8ce864d9 ("ice: Recognize 860 as iSCSI port in CEE mode")
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_dcb.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Tested-by: Tony Brelinski <tonyx.brelinski at intel.com> A Contingent Worker at Intel