From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Mon, 7 Nov 2022 08:59:42 +0000 (+0100)
Subject: 4.19-stable patches
X-Git-Tag: v4.9.333~65
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=885f2c6fd5e9a81f939feb986784182898532d02;p=thirdparty%2Fkernel%2Fstable-queue.git

4.19-stable patches

added patches:
	block-bfq-protect-bfqd-queued-by-bfqd-lock.patch
	bluetooth-l2cap-fix-attempting-to-access-uninitialized-memory.patch
---

diff --git a/queue-4.19/block-bfq-protect-bfqd-queued-by-bfqd-lock.patch b/queue-4.19/block-bfq-protect-bfqd-queued-by-bfqd-lock.patch
new file mode 100644
index 00000000000..99687251ec5
--- /dev/null
+++ b/queue-4.19/block-bfq-protect-bfqd-queued-by-bfqd-lock.patch
@@ -0,0 +1,47 @@
+From 181490d5321806e537dc5386db5ea640b826bf78 Mon Sep 17 00:00:00 2001
+From: Yu Kuai <yukuai3@huawei.com>
+Date: Fri, 13 May 2022 10:35:06 +0800
+Subject: block, bfq: protect 'bfqd->queued' by 'bfqd->lock'
+
+From: Yu Kuai <yukuai3@huawei.com>
+
+commit 181490d5321806e537dc5386db5ea640b826bf78 upstream.
+
+If bfq_schedule_dispatch() is called from bfq_idle_slice_timer_body(),
+then 'bfqd->queued' is read without holding 'bfqd->lock'. This is
+wrong since it can be wrote concurrently.
+
+Fix the problem by holding 'bfqd->lock' in such case.
+
+Signed-off-by: Yu Kuai <yukuai3@huawei.com>
+Reviewed-by: Jan Kara <jack@suse.cz>
+Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
+Link: https://lore.kernel.org/r/20220513023507.2625717-2-yukuai3@huawei.com
+Signed-off-by: Jens Axboe <axboe@kernel.dk>
+Cc: Khazhy Kumykov <khazhy@chromium.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ block/bfq-iosched.c |    4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/block/bfq-iosched.c
++++ b/block/bfq-iosched.c
+@@ -416,6 +416,8 @@ static struct bfq_io_cq *bfq_bic_lookup(
+  */
+ void bfq_schedule_dispatch(struct bfq_data *bfqd)
+ {
++	lockdep_assert_held(&bfqd->lock);
++
+ 	if (bfqd->queued != 0) {
+ 		bfq_log(bfqd, "schedule dispatch");
+ 		blk_mq_run_hw_queues(bfqd->queue, true);
+@@ -5278,8 +5280,8 @@ bfq_idle_slice_timer_body(struct bfq_dat
+ 	bfq_bfqq_expire(bfqd, bfqq, true, reason);
+ 
+ schedule_dispatch:
+-	spin_unlock_irqrestore(&bfqd->lock, flags);
+ 	bfq_schedule_dispatch(bfqd);
++	spin_unlock_irqrestore(&bfqd->lock, flags);
+ }
+ 
+ /*
diff --git a/queue-4.19/bluetooth-l2cap-fix-attempting-to-access-uninitialized-memory.patch b/queue-4.19/bluetooth-l2cap-fix-attempting-to-access-uninitialized-memory.patch
new file mode 100644
index 00000000000..30a0ba11357
--- /dev/null
+++ b/queue-4.19/bluetooth-l2cap-fix-attempting-to-access-uninitialized-memory.patch
@@ -0,0 +1,37 @@
+From b1a2cd50c0357f243b7435a732b4e62ba3157a2e Mon Sep 17 00:00:00 2001
+From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
+Date: Mon, 31 Oct 2022 16:10:52 -0700
+Subject: Bluetooth: L2CAP: Fix attempting to access uninitialized memory
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
+
+commit b1a2cd50c0357f243b7435a732b4e62ba3157a2e upstream.
+
+On l2cap_parse_conf_req the variable efs is only initialized if
+remote_efs has been set.
+
+CVE: CVE-2022-42895
+CC: stable@vger.kernel.org
+Reported-by: Tamás Koczka <poprdi@google.com>
+Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
+Reviewed-by: Tedd Ho-Jeong An <tedd.an@intel.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/bluetooth/l2cap_core.c |    3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/net/bluetooth/l2cap_core.c
++++ b/net/bluetooth/l2cap_core.c
+@@ -3551,7 +3551,8 @@ done:
+ 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+ 					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);
+ 
+-			if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
++			if (remote_efs &&
++			    test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
+ 				chan->remote_id = efs.id;
+ 				chan->remote_stype = efs.stype;
+ 				chan->remote_msdu = le16_to_cpu(efs.msdu);
diff --git a/queue-4.19/series b/queue-4.19/series
index 6c82aea498d..1a60079f00b 100644
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -27,3 +27,5 @@ media-cros-ec-cec-limit-msg.len-to-cec_max_msg_size.patch
 media-dvb-frontends-drxk-initialize-err-to-0.patch
 hid-saitek-add-madcatz-variant-of-mmo7-mouse-device-.patch
 i2c-xiic-add-platform-module-alias.patch
+bluetooth-l2cap-fix-attempting-to-access-uninitialized-memory.patch
+block-bfq-protect-bfqd-queued-by-bfqd-lock.patch