6.6-stable review patch. If anyone has any objections, please let me know.
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From: Luiz Augusto von Dentz luiz.von.dentz@intel.com
[ Upstream commit 20a2aa01f5aeb6daad9aeaa7c33dd512c58d81eb ]
The len parameter is considered optional so it can be NULL so it cannot be used for skipping to next entry of EIR_SERVICE_DATA.
Fixes: 8f9ae5b3ae80 ("Bluetooth: eir: Add helpers for managing service data") Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/eir.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/net/bluetooth/eir.c b/net/bluetooth/eir.c index 1bc51e2b05a34..3e1713673ecc9 100644 --- a/net/bluetooth/eir.c +++ b/net/bluetooth/eir.c @@ -366,17 +366,19 @@ u8 eir_create_scan_rsp(struct hci_dev *hdev, u8 instance, u8 *ptr)
void *eir_get_service_data(u8 *eir, size_t eir_len, u16 uuid, size_t *len) { - while ((eir = eir_get_data(eir, eir_len, EIR_SERVICE_DATA, len))) { + size_t dlen; + + while ((eir = eir_get_data(eir, eir_len, EIR_SERVICE_DATA, &dlen))) { u16 value = get_unaligned_le16(eir);
if (uuid == value) { if (len) - *len -= 2; + *len = dlen - 2; return &eir[2]; }
- eir += *len; - eir_len -= *len; + eir += dlen; + eir_len -= dlen; }
return NULL;