6.6-stable patches

added patches:
	input-mt-limit-max-slots.patch

diff --git a/queue-6.6/input-mt-limit-max-slots.patch b/queue-6.6/input-mt-limit-max-slots.patch
new file mode 100644 (file)
index 0000000..755ecfb
--- /dev/null
+++ b/queue-6.6/input-mt-limit-max-slots.patch
@@ -0,0 +1,37 @@
+From 99d3bf5f7377d42f8be60a6b9cb60fb0be34dceb Mon Sep 17 00:00:00 2001
+From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
+Date: Mon, 29 Jul 2024 21:51:30 +0900
+Subject: Input: MT - limit max slots
+
+From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
+
+commit 99d3bf5f7377d42f8be60a6b9cb60fb0be34dceb upstream.
+
+syzbot is reporting too large allocation at input_mt_init_slots(), for
+num_slots is supplied from userspace using ioctl(UI_DEV_CREATE).
+
+Since nobody knows possible max slots, this patch chose 1024.
+
+Reported-by: syzbot <syzbot+0122fa359a69694395d5@syzkaller.appspotmail.com>
+Closes: https://syzkaller.appspot.com/bug?extid=0122fa359a69694395d5
+Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
+Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: George Kennedy <george.kennedy@oracle.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/input/input-mt.c |    3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/input/input-mt.c
++++ b/drivers/input/input-mt.c
+@@ -46,6 +46,9 @@ int input_mt_init_slots(struct input_dev
+               return 0;
+       if (mt)
+               return mt->num_slots != num_slots ? -EINVAL : 0;
++      /* Arbitrary limit for avoiding too large memory allocation. */
++      if (num_slots > 1024)
++              return -EINVAL;
+ 
+       mt = kzalloc(struct_size(mt, slots, num_slots), GFP_KERNEL);
+       if (!mt)

diff --git a/queue-6.6/series b/queue-6.6/series
index 6a7ffdf7fca3b97065edf89c3d608b4416af664c..0b01b961b686d3c5fc48aed8cf45ea79edcc30ba 100644 (file)
--- a/queue-6.6/series
+++ b/queue-6.6/series
@@ -338,3 +338,4 @@ drm-amdgpu-vcn-not-pause-dpg-for-unified-queue.patch
 ksmbd-fix-race-condition-between-destroy_previous_session-and-smb2-operations.patch
 net-ngbe-fix-phy-mode-set-to-external-phy.patch
 revert-s390-dasd-establish-dma-alignment.patch
+input-mt-limit-max-slots.patch