This is a note to let you know that I've just added the patch titled
NFSD: Use struct_size() helper in alloc_session()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-use-struct_size-helper-in-alloc_session.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a3ec2c80d6c135855b3a3ae1cc6b01d4aec233b4
Author: Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>
Date: Fri Nov 11 17:18:35 2022 +0800
NFSD: Use struct_size() helper in alloc_session()
[ Upstream commit 85a0d0c9a58002ef7d1bf5e3ea630f4fbd42a4f0 ]
Use struct_size() helper to simplify the code, no functional changes.
Signed-off-by: Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 39b315e3471f5..524865c7211ef 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1833,13 +1833,12 @@ static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
int numslots = fattrs->maxreqs;
int slotsize = slot_bytes(fattrs);
struct nfsd4_session *new;
- int mem, i;
+ int i;
- BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
- + sizeof(struct nfsd4_session) > PAGE_SIZE);
- mem = numslots * sizeof(struct nfsd4_slot *);
+ BUILD_BUG_ON(struct_size(new, se_slots, NFSD_MAX_SLOTS_PER_SESSION)
+ > PAGE_SIZE);
- new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
+ new = kzalloc(struct_size(new, se_slots, numslots), GFP_KERNEL);
if (!new)
return NULL;
/* allocate each struct nfsd4_slot and data cache in one piece */
