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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-03-28 12:30:29 -0500 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2019-04-23 19:31:05 +0200 |
| commit | 5bec1fb866df8f58b04a46bcbe27481214977e4c (patch) | |
| tree | 35331ab338cd76cdc5e98e40f9831d37bc3dd24f | |
| parent | 7f09d5a6c33be66a5ca19bf9dd1c2d90c5dfcf0d (diff) | |
| download | linux-stable-5bec1fb866df8f58b04a46bcbe27481214977e4c.tar.gz linux-stable-5bec1fb866df8f58b04a46bcbe27481214977e4c.tar.bz2 linux-stable-5bec1fb866df8f58b04a46bcbe27481214977e4c.zip | |
Bluetooth: Use struct_size() helper
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:
struct foo {
int stuff;
struct boo entry[];
};
size = sizeof(struct foo) + count * sizeof(struct boo);
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
size = struct_size(instance, entry, count);
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | net/bluetooth/mgmt.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 2457f408d17d..150114e33b20 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -2301,8 +2301,7 @@ static int load_link_keys(struct sock *sk, struct hci_dev *hdev, void *data, MGMT_STATUS_INVALID_PARAMS); } - expected_len = sizeof(*cp) + key_count * - sizeof(struct mgmt_link_key_info); + expected_len = struct_size(cp, keys, key_count); if (expected_len != len) { bt_dev_err(hdev, "load_link_keys: expected %u bytes, got %u bytes", expected_len, len); @@ -5030,7 +5029,7 @@ static int load_irks(struct sock *sk, struct hci_dev *hdev, void *cp_data, MGMT_STATUS_INVALID_PARAMS); } - expected_len = sizeof(*cp) + irk_count * sizeof(struct mgmt_irk_info); + expected_len = struct_size(cp, irks, irk_count); if (expected_len != len) { bt_dev_err(hdev, "load_irks: expected %u bytes, got %u bytes", expected_len, len); @@ -5112,8 +5111,7 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev, MGMT_STATUS_INVALID_PARAMS); } - expected_len = sizeof(*cp) + key_count * - sizeof(struct mgmt_ltk_info); + expected_len = struct_size(cp, keys, key_count); if (expected_len != len) { bt_dev_err(hdev, "load_keys: expected %u bytes, got %u bytes", expected_len, len); @@ -5847,8 +5845,7 @@ static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data, MGMT_STATUS_INVALID_PARAMS); } - expected_len = sizeof(*cp) + param_count * - sizeof(struct mgmt_conn_param); + expected_len = struct_size(cp, params, param_count); if (expected_len != len) { bt_dev_err(hdev, "load_conn_param: expected %u bytes, got %u bytes", expected_len, len); |