4.19-stable patches

added patches:
	bluetooth-add-cmd-validity-checks-at-the-start-of-hci_sock_ioctl.patch

diff --git a/queue-4.19/bluetooth-add-cmd-validity-checks-at-the-start-of-hci_sock_ioctl.patch b/queue-4.19/bluetooth-add-cmd-validity-checks-at-the-start-of-hci_sock_ioctl.patch
new file mode 100644 (file)
index 0000000..04fc019
--- /dev/null
+++ b/queue-4.19/bluetooth-add-cmd-validity-checks-at-the-start-of-hci_sock_ioctl.patch
@@ -0,0 +1,67 @@
+From 000c2fa2c144c499c881a101819cf1936a1f7cf2 Mon Sep 17 00:00:00 2001
+From: Ruihan Li <lrh2000@pku.edu.cn>
+Date: Sun, 16 Apr 2023 16:02:51 +0800
+Subject: bluetooth: Add cmd validity checks at the start of hci_sock_ioctl()
+
+From: Ruihan Li <lrh2000@pku.edu.cn>
+
+commit 000c2fa2c144c499c881a101819cf1936a1f7cf2 upstream.
+
+Previously, channel open messages were always sent to monitors on the first
+ioctl() call for unbound HCI sockets, even if the command and arguments
+were completely invalid. This can leave an exploitable hole with the abuse
+of invalid ioctl calls.
+
+This commit hardens the ioctl processing logic by first checking if the
+command is valid, and immediately returning with an ENOIOCTLCMD error code
+if it is not. This ensures that ioctl calls with invalid commands are free
+of side effects, and increases the difficulty of further exploitation by
+forcing exploitation to find a way to pass a valid command first.
+
+Signed-off-by: Ruihan Li <lrh2000@pku.edu.cn>
+Co-developed-by: Marcel Holtmann <marcel@holtmann.org>
+Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
+Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
+Signed-off-by: Dragos-Marian Panait <dragos.panait@windriver.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/bluetooth/hci_sock.c |   28 ++++++++++++++++++++++++++++
+ 1 file changed, 28 insertions(+)
+
+--- a/net/bluetooth/hci_sock.c
++++ b/net/bluetooth/hci_sock.c
+@@ -973,6 +973,34 @@ static int hci_sock_ioctl(struct socket
+ 
+       BT_DBG("cmd %x arg %lx", cmd, arg);
+ 
++      /* Make sure the cmd is valid before doing anything */
++      switch (cmd) {
++      case HCIGETDEVLIST:
++      case HCIGETDEVINFO:
++      case HCIGETCONNLIST:
++      case HCIDEVUP:
++      case HCIDEVDOWN:
++      case HCIDEVRESET:
++      case HCIDEVRESTAT:
++      case HCISETSCAN:
++      case HCISETAUTH:
++      case HCISETENCRYPT:
++      case HCISETPTYPE:
++      case HCISETLINKPOL:
++      case HCISETLINKMODE:
++      case HCISETACLMTU:
++      case HCISETSCOMTU:
++      case HCIINQUIRY:
++      case HCISETRAW:
++      case HCIGETCONNINFO:
++      case HCIGETAUTHINFO:
++      case HCIBLOCKADDR:
++      case HCIUNBLOCKADDR:
++              break;
++      default:
++              return -ENOIOCTLCMD;
++      }
++
+       lock_sock(sk);
+ 
+       if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {

diff --git a/queue-4.19/series b/queue-4.19/series
index 79465acf412ce20ad36603ffcc612e1e0b21ce81..881b16bc90b81136dec97dc5b883b07affe462c8 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -4,3 +4,4 @@ power-supply-bq27xxx-after-charger-plug-in-out-wait-.patch
 power-supply-core-refactor-power_supply_set_input_cu.patch
 power-supply-bq24190-call-power_supply_changed-after.patch
 cdc_ncm-fix-the-build-warning.patch
+bluetooth-add-cmd-validity-checks-at-the-start-of-hci_sock_ioctl.patch