Patch "wifi: iwlegacy: 4965: corrected fix for potential off-by-one overflow in il4965_rs_fill_link_cmd()" has been added to the 5.15-stable tree

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

    wifi: iwlegacy: 4965: corrected fix for potential off-by-one overflow in il4965_rs_fill_link_cmd()

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:
     wifi-iwlegacy-4965-corrected-fix-for-potential-off-by-one-overflow-in-il4965_rs_fill_link_cmd.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@xxxxxxxxxxxxxxx> know about it.


>From 6d0ef7241553f3553a0a2764c69b07892705924c Mon Sep 17 00:00:00 2001
From: Stanislaw Gruszka <stf_xl@xxxxx>
Date: Mon, 15 Aug 2022 09:37:37 +0200
Subject: wifi: iwlegacy: 4965: corrected fix for potential off-by-one overflow in il4965_rs_fill_link_cmd()

From: Stanislaw Gruszka <stf_xl@xxxxx>

commit 6d0ef7241553f3553a0a2764c69b07892705924c upstream.

This reverts commit a8eb8e6f7159c7c20c0ddac428bde3d110890aa7 as
it can cause invalid link quality command sent to the firmware
and address the off-by-one issue by fixing condition of while loop.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: a8eb8e6f7159 ("wifi: iwlegacy: 4965: fix potential off-by-one overflow in il4965_rs_fill_link_cmd()")
Signed-off-by: Stanislaw Gruszka <stf_xl@xxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220815073737.GA999388@xxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/wireless/intel/iwlegacy/4965-rs.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/net/wireless/intel/iwlegacy/4965-rs.c
+++ b/drivers/net/wireless/intel/iwlegacy/4965-rs.c
@@ -2403,7 +2403,7 @@ il4965_rs_fill_link_cmd(struct il_priv *
 		/* Repeat initial/next rate.
 		 * For legacy IL_NUMBER_TRY == 1, this loop will not execute.
 		 * For HT IL_HT_NUMBER_TRY == 3, this executes twice. */
-		while (repeat_rate > 0) {
+		while (repeat_rate > 0 && idx < (LINK_QUAL_MAX_RETRY_NUM - 1)) {
 			if (is_legacy(tbl_type.lq_type)) {
 				if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
 					ant_toggle_cnt++;
@@ -2422,8 +2422,6 @@ il4965_rs_fill_link_cmd(struct il_priv *
 			    cpu_to_le32(new_rate);
 			repeat_rate--;
 			idx++;
-			if (idx >= LINK_QUAL_MAX_RETRY_NUM)
-				goto out;
 		}
 
 		il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band,
@@ -2468,7 +2466,6 @@ il4965_rs_fill_link_cmd(struct il_priv *
 		repeat_rate--;
 	}
 
-out:
 	lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 	lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
 


Patches currently in stable-queue which might be from stf_xl@xxxxx are

queue-5.15/wifi-iwlegacy-4965-corrected-fix-for-potential-off-by-one-overflow-in-il4965_rs_fill_link_cmd.patch



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