lkml.org 
[lkml]   [2017]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] IB/hfi1: use size_t for passing array length
From
Date
On Tue, 2017-02-14 at 22:23 +0100, Arnd Bergmann wrote:
> gcc-7 produces a mysterious warning about the size argument being
> potentially out
> of range:
>
> drivers/infiniband/hw/hfi1/verbs.c: In function 'init_cntr_names':
> drivers/infiniband/hw/hfi1/verbs.c:1644:2: error: 'memcpy': specified
> size between 18446744071562067968 and 18446744073709551615 exceeds
> maximum object size 9223372036854775807 [-Werror=stringop-overflow=]
>
> This seems to refer to a the case where an 64-bit size_t gets
> truncated
> into a negative 'int' and subsequently turned into a high 64-bit
> number
> again.
>
> The fix is clearly to use size_t here, which matches the type that
> gets
> used for this value elsewhere.
>
> Fixes: b7481944b06e ("IB/hfi1: Show statistics counters under IB
> stats interface")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Thanks, applied.

--
Doug Ledford <dledford@redhat.com>
    GPG KeyID: B826A3330E572FDD
   
Key fingerprint = AE6B 1BDA 122B 23B4 265B  1274 B826 A333 0E57 2FDD
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2017-02-19 14:57    [W:1.571 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site