diff options
Diffstat (limited to 'package/kernel/mac80211/patches/374-ath9k-Protect-queue-draining-by-rcu_read_lock.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/374-ath9k-Protect-queue-draining-by-rcu_read_lock.patch | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/package/kernel/mac80211/patches/374-ath9k-Protect-queue-draining-by-rcu_read_lock.patch b/package/kernel/mac80211/patches/374-ath9k-Protect-queue-draining-by-rcu_read_lock.patch deleted file mode 100644 index 0b599b73ac..0000000000 --- a/package/kernel/mac80211/patches/374-ath9k-Protect-queue-draining-by-rcu_read_lock.patch +++ /dev/null @@ -1,43 +0,0 @@ -From: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= <toke@toke.dk> -Date: Fri, 2 Feb 2018 11:36:45 +0100 -Subject: [PATCH] ath9k: Protect queue draining by rcu_read_lock() -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -When ath9k was switched over to use the mac80211 intermediate queues, -node cleanup now drains the mac80211 queues. However, this call path is -not protected by rcu_read_lock() as it was previously entirely internal -to the driver which uses its own locking. - -This leads to a possible rcu_dereference() without holding -rcu_read_lock(); but only if a station is cleaned up while having -packets queued on the TXQ. Fix this by adding the rcu_read_lock() to the -caller in ath9k. - -Fixes: 50f08edf9809 ("ath9k: Switch to using mac80211 intermediate software queues.") -Cc: stable@vger.kernel.org -Reported-by: Ben Greear <greearb@candelatech.com> -Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> ---- - ---- a/drivers/net/wireless/ath/ath9k/xmit.c -+++ b/drivers/net/wireless/ath/ath9k/xmit.c -@@ -2915,6 +2915,8 @@ void ath_tx_node_cleanup(struct ath_soft - struct ath_txq *txq; - int tidno; - -+ rcu_read_lock(); -+ - for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) { - tid = ath_node_to_tid(an, tidno); - txq = tid->txq; -@@ -2932,6 +2934,8 @@ void ath_tx_node_cleanup(struct ath_soft - if (!an->sta) - break; /* just one multicast ath_atx_tid */ - } -+ -+ rcu_read_unlock(); - } - - #ifdef CPTCFG_ATH9K_TX99 |