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* [PATCH] ksmbd: Use struct_size() to improve smb_direct_rdma_xmit()
@ 2024-09-28 15:00 Thorsten Blum
  2024-10-01  4:31 ` Namjae Jeon
  0 siblings, 1 reply; 2+ messages in thread
From: Thorsten Blum @ 2024-09-28 15:00 UTC (permalink / raw)
  To: Namjae Jeon, Steve French, Sergey Senozhatsky, Tom Talpey
  Cc: Thorsten Blum, linux-cifs, linux-kernel

Use struct_size() to calculate the number of bytes to allocate for a
new message.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
 fs/smb/server/transport_rdma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/smb/server/transport_rdma.c b/fs/smb/server/transport_rdma.c
index 44c87e300c16..17c76713c6d0 100644
--- a/fs/smb/server/transport_rdma.c
+++ b/fs/smb/server/transport_rdma.c
@@ -1405,8 +1405,8 @@ static int smb_direct_rdma_xmit(struct smb_direct_transport *t,
 	/* build rdma_rw_ctx for each descriptor */
 	desc_buf = buf;
 	for (i = 0; i < desc_num; i++) {
-		msg = kzalloc(offsetof(struct smb_direct_rdma_rw_msg, sg_list) +
-			      sizeof(struct scatterlist) * SG_CHUNK_SIZE, GFP_KERNEL);
+		msg = kzalloc(struct_size(msg, sg_list, SG_CHUNK_SIZE),
+			      GFP_KERNEL);
 		if (!msg) {
 			ret = -ENOMEM;
 			goto out;
-- 
2.46.1


^ permalink raw reply related	[flat|nested] 2+ messages in thread

* Re: [PATCH] ksmbd: Use struct_size() to improve smb_direct_rdma_xmit()
  2024-09-28 15:00 [PATCH] ksmbd: Use struct_size() to improve smb_direct_rdma_xmit() Thorsten Blum
@ 2024-10-01  4:31 ` Namjae Jeon
  0 siblings, 0 replies; 2+ messages in thread
From: Namjae Jeon @ 2024-10-01  4:31 UTC (permalink / raw)
  To: Thorsten Blum
  Cc: Steve French, Sergey Senozhatsky, Tom Talpey, linux-cifs,
	linux-kernel

On Sun, Sep 29, 2024 at 12:01 AM Thorsten Blum <thorsten.blum@linux.dev> wrote:
>
> Use struct_size() to calculate the number of bytes to allocate for a
> new message.
>
> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Applied it to #ksmbd-for-next-next.
Thanks!

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2024-09-28 15:00 [PATCH] ksmbd: Use struct_size() to improve smb_direct_rdma_xmit() Thorsten Blum
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