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authorGustavo A. R. Silva <gustavoars@kernel.org>2020-06-18 08:35:00 -0500
committerDavid S. Miller <davem@davemloft.net>2020-06-19 20:15:25 -0700
commite034c6d23bc43266af1fa983212218f4aa38f995 (patch)
tree52849a855bc441927425cc3b8188c30b57edc31c /net/tipc
parent70fc6d9c14e24f9efae968589e5edf584a788e23 (diff)
downloadlinux-e034c6d23bc43266af1fa983212218f4aa38f995.tar.bz2
tipc: Use struct_size() helper
Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. This code was detected with the help of Coccinelle and, audited and fixed manually. Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/link.c8
-rw-r--r--net/tipc/msg.h6
2 files changed, 6 insertions, 8 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index eac89a3e22ce..1c579357ccdf 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1385,12 +1385,12 @@ u16 tipc_get_gap_ack_blks(struct tipc_gap_ack_blks **ga, struct tipc_link *l,
p = (struct tipc_gap_ack_blks *)msg_data(hdr);
sz = ntohs(p->len);
/* Sanity check */
- if (sz == tipc_gap_ack_blks_sz(p->ugack_cnt + p->bgack_cnt)) {
+ if (sz == struct_size(p, gacks, p->ugack_cnt + p->bgack_cnt)) {
/* Good, check if the desired type exists */
if ((uc && p->ugack_cnt) || (!uc && p->bgack_cnt))
goto ok;
/* Backward compatible: peer might not support bc, but uc? */
- } else if (uc && sz == tipc_gap_ack_blks_sz(p->ugack_cnt)) {
+ } else if (uc && sz == struct_size(p, gacks, p->ugack_cnt)) {
if (p->ugack_cnt) {
p->bgack_cnt = 0;
goto ok;
@@ -1472,7 +1472,7 @@ static u16 tipc_build_gap_ack_blks(struct tipc_link *l, struct tipc_msg *hdr)
__tipc_build_gap_ack_blks(ga, l, ga->bgack_cnt) : 0;
/* Total len */
- len = tipc_gap_ack_blks_sz(ga->bgack_cnt + ga->ugack_cnt);
+ len = struct_size(ga, gacks, ga->bgack_cnt + ga->ugack_cnt);
ga->len = htons(len);
return len;
}
@@ -1521,7 +1521,7 @@ static int tipc_link_advance_transmq(struct tipc_link *l, struct tipc_link *r,
gacks = &ga->gacks[ga->bgack_cnt];
} else if (ga) {
/* Copy the Gap ACKs, bc part, for later renewal if needed */
- this_ga = kmemdup(ga, tipc_gap_ack_blks_sz(ga->bgack_cnt),
+ this_ga = kmemdup(ga, struct_size(ga, gacks, ga->bgack_cnt),
GFP_ATOMIC);
if (likely(this_ga)) {
this_ga->start_index = 0;
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 65119e81ff0c..1016e96db5c4 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -189,11 +189,9 @@ struct tipc_gap_ack_blks {
struct tipc_gap_ack gacks[];
};
-#define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \
- sizeof(struct tipc_gap_ack) * (n))
-
#define MAX_GAP_ACK_BLKS 128
-#define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS)
+#define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \
+ sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS)
static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
{