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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-03-29 10:27:26 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-01 15:01:46 -0700 |
| commit | 76497732932f15e7323dc805e8ea8dc11bb587cf (patch) | |
| tree | b5131cf0c53e6a345627edab0b98117af816c30b | |
| parent | a2c7023f7075ca9b80f944d3f20f60e6574538e2 (diff) | |
| download | linux-76497732932f15e7323dc805e8ea8dc11bb587cf.tar.gz | |
cxgb3/l2t: Fix undefined behaviour
The use of zero-sized array causes undefined behaviour when it is not the last member in a structure. As it happens to be in this case. Also, the current code makes use of a language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as this one is a flexible array member, introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last. Which is beneficial to cultivate a high-quality code. Fixes: e48f129c2f20 ("[SCSI] cxgb3i: convert cdev->l2opt to use rcu to prevent NULL dereference") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb3/l2t.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb3/l2t.h b/drivers/net/ethernet/chelsio/cxgb3/l2t.h
index c2fd323c40782..ea75f275023ff 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/l2t.h
+++ b/drivers/net/ethernet/chelsio/cxgb3/l2t.h
@@ -75,8 +75,8 @@ struct l2t_data {
struct l2t_entry *rover; /* starting point for next allocation */
atomic_t nfree; /* number of free entries */
rwlock_t lock;
- struct l2t_entry l2tab[0];
struct rcu_head rcu_head; /* to handle rcu cleanup */
+ struct l2t_entry l2tab[];
};
typedef void (*arp_failure_handler_func)(struct t3cdev * dev,