From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: [PATCH] IB/hfi1: use size_t for passing array length Date: Tue, 14 Feb 2017 22:23:07 +0100 Message-ID: <20170214212358.2730288-1-arnd@arndb.de> Return-path: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mike Marciniszyn , Dennis Dalessandro Cc: Arnd Bergmann , Doug Ledford , Sean Hefty , Hal Rosenstock , Ira Weiny , Jubin John , Jianxin Xiong , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org 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 --- drivers/infiniband/hw/hfi1/verbs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c index 95ed4d6da510..1d8ac9432742 100644 --- a/drivers/infiniband/hw/hfi1/verbs.c +++ b/drivers/infiniband/hw/hfi1/verbs.c @@ -1618,7 +1618,7 @@ static int cntr_names_initialized; * external strings. */ static int init_cntr_names(const char *names_in, - const int names_len, + const size_t names_len, int num_extra_names, int *num_cntrs, const char ***cntr_names) -- 2.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html