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From: Szymon Janc <szymon.janc@codecoup.pl>
To: linux-bluetooth@vger.kernel.org
Cc: Szymon Janc <szymon.janc@codecoup.pl>, stable@vger.kernel.org
Subject: [PATCH v2] Bluetooth: Remove spurious error message
Date: Tue, 18 May 2021 16:54:36 +0200	[thread overview]
Message-ID: <20210518145436.156997-1-szymon.janc@codecoup.pl> (raw)

Even with rate limited reporting this is very spammy and since
it is remote device that is providing bogus data there is no
need to report this as error.

Since real_len variable was used only to allow conditional error
message it is now also removed.

[72454.143336] bt_err_ratelimited: 10 callbacks suppressed
[72454.143337] Bluetooth: hci0: advertising data len corrected
[72454.296314] Bluetooth: hci0: advertising data len corrected
[72454.892329] Bluetooth: hci0: advertising data len corrected
[72455.051319] Bluetooth: hci0: advertising data len corrected
[72455.357326] Bluetooth: hci0: advertising data len corrected
[72455.663295] Bluetooth: hci0: advertising data len corrected
[72455.787278] Bluetooth: hci0: advertising data len corrected
[72455.942278] Bluetooth: hci0: advertising data len corrected
[72456.094276] Bluetooth: hci0: advertising data len corrected
[72456.249137] Bluetooth: hci0: advertising data len corrected
[72459.416333] bt_err_ratelimited: 13 callbacks suppressed
[72459.416334] Bluetooth: hci0: advertising data len corrected
[72459.721334] Bluetooth: hci0: advertising data len corrected
[72460.011317] Bluetooth: hci0: advertising data len corrected
[72460.327171] Bluetooth: hci0: advertising data len corrected
[72460.638294] Bluetooth: hci0: advertising data len corrected
[72460.946350] Bluetooth: hci0: advertising data len corrected
[72461.225320] Bluetooth: hci0: advertising data len corrected
[72461.690322] Bluetooth: hci0: advertising data len corrected
[72462.118318] Bluetooth: hci0: advertising data len corrected
[72462.427319] Bluetooth: hci0: advertising data len corrected
[72464.546319] bt_err_ratelimited: 7 callbacks suppressed
[72464.546319] Bluetooth: hci0: advertising data len corrected
[72464.857318] Bluetooth: hci0: advertising data len corrected
[72465.163332] Bluetooth: hci0: advertising data len corrected
[72465.278331] Bluetooth: hci0: advertising data len corrected
[72465.432323] Bluetooth: hci0: advertising data len corrected
[72465.891334] Bluetooth: hci0: advertising data len corrected
[72466.045334] Bluetooth: hci0: advertising data len corrected
[72466.197321] Bluetooth: hci0: advertising data len corrected
[72466.340318] Bluetooth: hci0: advertising data len corrected
[72466.498335] Bluetooth: hci0: advertising data len corrected
[72469.803299] bt_err_ratelimited: 10 callbacks suppressed

Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=203753
Cc: stable@vger.kernel.org
---
 net/bluetooth/hci_event.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 5e99968939ce..f15d8b85571a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -5441,7 +5441,7 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
 	struct hci_conn *conn;
 	bool match;
 	u32 flags;
-	u8 *ptr, real_len;
+	u8 *ptr;
 
 	switch (type) {
 	case LE_ADV_IND:
@@ -5472,14 +5472,10 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
 			break;
 	}
 
-	real_len = ptr - data;
-
-	/* Adjust for actual length */
-	if (len != real_len) {
-		bt_dev_err_ratelimited(hdev, "advertising data len corrected %u -> %u",
-				       len, real_len);
-		len = real_len;
-	}
+	/* Adjust for actual length. This handles the case when remote
+	 * device is advertising with incorrect data length.
+	 */
+	len = ptr - data;
 
 	/* If the direct address is present, then this report is from
 	 * a LE Direct Advertising Report event. In that case it is
-- 
2.31.1


             reply	other threads:[~2021-05-18 14:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-18 14:54 Szymon Janc [this message]
2021-05-18 16:14 ` [v2] Bluetooth: Remove spurious error message bluez.test.bot
2021-05-20 15:14 ` [PATCH v2] " Marcel Holtmann
  -- strict thread matches above, loose matches on Subject: below --
2021-05-13 12:22 Szymon Janc
2021-05-13 15:11 ` Marcel Holtmann
2021-05-13 20:34 ` Luiz Augusto von Dentz

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