This is a note to let you know that I've just added the patch titled

    mptcp: clean up harmless false expressions

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mptcp-clean-up-harmless-false-expressions.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


From stable+bounces-25407-greg=kroah.com@vger.kernel.org Wed Feb 28 18:37:44 2024
From: "Matthieu Baerts (NGI0)" <matttbe@kernel.org>
Date: Wed, 28 Feb 2024 18:37:15 +0100
Subject: mptcp: clean up harmless false expressions
To: stable@vger.kernel.org, gregkh@linuxfoundation.org
Cc: MPTCP Upstream <mptcp@lists.linux.dev>, Jean Sacren <sakiwit@gmail.com>, Matthieu Baerts <matthieu.baerts@tessares.net>, Mat Martineau <mathew.j.martineau@linux.intel.com>, Jakub Kicinski <kuba@kernel.org>, Matthieu Baerts <matttbe@kernel.org>
Message-ID: <20240228173714.262012-3-matttbe@kernel.org>

From: Jean Sacren <sakiwit@gmail.com>

commit 59060a47ca50bbdb1d863b73667a1065873ecc06 upstream.

entry->addr.id is u8 with a range from 0 to 255 and MAX_ADDR_ID is 255.
We should drop both false expressions of (entry->addr.id > MAX_ADDR_ID).

We should also remove the obsolete parentheses in the first if branch.

Use U8_MAX for MAX_ADDR_ID and add a comment to show the link to
mptcp_addr_info.id as suggested by Mr. Matthieu Baerts.

Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/mptcp/pm_netlink.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -38,7 +38,8 @@ struct mptcp_pm_add_entry {
 	u8			retrans_times;
 };
 
-#define MAX_ADDR_ID		255
+/* max value of mptcp_addr_info.id */
+#define MAX_ADDR_ID		U8_MAX
 #define BITMAP_SZ DIV_ROUND_UP(MAX_ADDR_ID + 1, BITS_PER_LONG)
 
 struct pm_nl_pernet {
@@ -854,14 +855,13 @@ find_next:
 		entry->addr.id = find_next_zero_bit(pernet->id_bitmap,
 						    MAX_ADDR_ID + 1,
 						    pernet->next_id);
-		if ((!entry->addr.id || entry->addr.id > MAX_ADDR_ID) &&
-		    pernet->next_id != 1) {
+		if (!entry->addr.id && pernet->next_id != 1) {
 			pernet->next_id = 1;
 			goto find_next;
 		}
 	}
 
-	if (!entry->addr.id || entry->addr.id > MAX_ADDR_ID)
+	if (!entry->addr.id)
 		goto out;
 
 	__set_bit(entry->addr.id, pernet->id_bitmap);


Patches currently in stable-queue which might be from kroah.com@vger.kernel.org are

queue-5.15/selftests-mptcp-add-missing-kconfig-for-nf-filter.patch
queue-5.15/selftests-mptcp-add-missing-kconfig-for-nf-filter-in-v6.patch
queue-5.15/mptcp-add-needs_id-for-netlink-appending-addr.patch
queue-5.15/mptcp-rename-timer-related-helper-to-less-confusing-names.patch
queue-5.15/mptcp-process-pending-subflow-error-on-close.patch
queue-5.15/mptcp-clean-up-harmless-false-expressions.patch
queue-5.15/mptcp-move-__mptcp_error_report-in-protocol.c.patch