diff mbox series

xprtrdma: fix incorrect header size calcations

Message ID 20200715162604.1080552-1-colin.king@canonical.com (mailing list archive)
State New, archived
Headers show
Series xprtrdma: fix incorrect header size calcations | expand

Commit Message

Colin King July 15, 2020, 4:26 p.m. UTC 
From: Colin Ian King <colin.king@canonical.com>

Currently the header size calculations are using an assignment
operator instead of a += operator when accumulating the header
size leading to incorrect sizes.  Fix this by using the correct
operator.

Addresses-Coverity: ("Unused value")
Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Colin King July 15, 2020, 4:31 p.m. UTC | #1 
Bah, $SUBJECT typo "calcations" -> "calculations". can that be fixed up
when it's applied, or shall I send a V2?

On 15/07/2020 17:26, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Currently the header size calculations are using an assignment
> operator instead of a += operator when accumulating the header
> size leading to incorrect sizes.  Fix this by using the correct
> operator.
> 
> Addresses-Coverity: ("Unused value")
> Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
>  net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
> index 935bbef2f7be..453bacc99907 100644
> --- a/net/sunrpc/xprtrdma/rpc_rdma.c
> +++ b/net/sunrpc/xprtrdma/rpc_rdma.c
> @@ -71,7 +71,7 @@ static unsigned int rpcrdma_max_call_header_size(unsigned int maxsegs)
>  	size = RPCRDMA_HDRLEN_MIN;
>  
>  	/* Maximum Read list size */
> -	size = maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
> +	size += maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
>  
>  	/* Minimal Read chunk size */
>  	size += sizeof(__be32);	/* segment count */
> @@ -94,7 +94,7 @@ static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs)
>  	size = RPCRDMA_HDRLEN_MIN;
>  
>  	/* Maximum Write list size */
> -	size = sizeof(__be32);		/* segment count */
> +	size += sizeof(__be32);		/* segment count */
>  	size += maxsegs * rpcrdma_segment_maxsz * sizeof(__be32);
>  	size += sizeof(__be32);	/* list discriminator */
>  
>
Chuck Lever III July 15, 2020, 4:39 p.m. UTC | #2 
> On Jul 15, 2020, at 12:31 PM, Colin Ian King <colin.king@canonical.com> wrote:
> 
> Bah, $SUBJECT typo "calcations" -> "calculations". can that be fixed up
> when it's applied, or shall I send a V2?

Anna's preference.

Reviewed-by: Chuck Lever <chuck.lever@oracle.com>


> On 15/07/2020 17:26, Colin King wrote:
>> From: Colin Ian King <colin.king@canonical.com>
>> 
>> Currently the header size calculations are using an assignment
>> operator instead of a += operator when accumulating the header
>> size leading to incorrect sizes.  Fix this by using the correct
>> operator.
>> 
>> Addresses-Coverity: ("Unused value")
>> Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow")
>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
>> ---
>> net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>> 
>> diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
>> index 935bbef2f7be..453bacc99907 100644
>> --- a/net/sunrpc/xprtrdma/rpc_rdma.c
>> +++ b/net/sunrpc/xprtrdma/rpc_rdma.c
>> @@ -71,7 +71,7 @@ static unsigned int rpcrdma_max_call_header_size(unsigned int maxsegs)
>> 	size = RPCRDMA_HDRLEN_MIN;
>> 
>> 	/* Maximum Read list size */
>> -	size = maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
>> +	size += maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
>> 
>> 	/* Minimal Read chunk size */
>> 	size += sizeof(__be32);	/* segment count */
>> @@ -94,7 +94,7 @@ static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs)
>> 	size = RPCRDMA_HDRLEN_MIN;
>> 
>> 	/* Maximum Write list size */
>> -	size = sizeof(__be32);		/* segment count */
>> +	size += sizeof(__be32);		/* segment count */
>> 	size += maxsegs * rpcrdma_segment_maxsz * sizeof(__be32);
>> 	size += sizeof(__be32);	/* list discriminator */
>> 
>> 
> 

--
Chuck Lever
Schumaker, Anna July 15, 2020, 4:40 p.m. UTC | #3 
No need for a v2, I can fix it up!


On Wed, Jul 15, 2020 at 12:32 PM Colin Ian King
<colin.king@canonical.com> wrote:
>
> Bah, $SUBJECT typo "calcations" -> "calculations". can that be fixed up
> when it's applied, or shall I send a V2?
>
> On 15/07/2020 17:26, Colin King wrote:
> > From: Colin Ian King <colin.king@canonical.com>
> >
> > Currently the header size calculations are using an assignment
> > operator instead of a += operator when accumulating the header
> > size leading to incorrect sizes.  Fix this by using the correct
> > operator.
> >
> > Addresses-Coverity: ("Unused value")
> > Fixes: 302d3deb2068 ("xprtrdma: Prevent inline overflow")
> > Signed-off-by: Colin Ian King <colin.king@canonical.com>
> > ---
> >  net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
> > index 935bbef2f7be..453bacc99907 100644
> > --- a/net/sunrpc/xprtrdma/rpc_rdma.c
> > +++ b/net/sunrpc/xprtrdma/rpc_rdma.c
> > @@ -71,7 +71,7 @@ static unsigned int rpcrdma_max_call_header_size(unsigned int maxsegs)
> >       size = RPCRDMA_HDRLEN_MIN;
> >
> >       /* Maximum Read list size */
> > -     size = maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
> > +     size += maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
> >
> >       /* Minimal Read chunk size */
> >       size += sizeof(__be32); /* segment count */
> > @@ -94,7 +94,7 @@ static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs)
> >       size = RPCRDMA_HDRLEN_MIN;
> >
> >       /* Maximum Write list size */
> > -     size = sizeof(__be32);          /* segment count */
> > +     size += sizeof(__be32);         /* segment count */
> >       size += maxsegs * rpcrdma_segment_maxsz * sizeof(__be32);
> >       size += sizeof(__be32); /* list discriminator */
> >
> >
>
diff mbox series

Patch

diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 935bbef2f7be..453bacc99907 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -71,7 +71,7 @@  static unsigned int rpcrdma_max_call_header_size(unsigned int maxsegs)
 	size = RPCRDMA_HDRLEN_MIN;
 
 	/* Maximum Read list size */
-	size = maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
+	size += maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
 
 	/* Minimal Read chunk size */
 	size += sizeof(__be32);	/* segment count */
@@ -94,7 +94,7 @@  static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs)
 	size = RPCRDMA_HDRLEN_MIN;
 
 	/* Maximum Write list size */
-	size = sizeof(__be32);		/* segment count */
+	size += sizeof(__be32);		/* segment count */
 	size += maxsegs * rpcrdma_segment_maxsz * sizeof(__be32);
 	size += sizeof(__be32);	/* list discriminator */