5.4-stable patches

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

diff --git a/queue-5.4/bluetooth-add-cmd-validity-checks-at-the-start-of-hci_sock_ioctl.patch b/queue-5.4/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-5.4/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-5.4/series b/queue-5.4/series
index 8e623146054c452a197770603971d23772fae9bb..6a7c079baf9cd3005f83a6da3bc2d30a1eac9025 100644 (file)
--- a/queue-5.4/series
+++ b/queue-5.4/series
@@ -10,3 +10,4 @@ cdc_ncm-fix-the-build-warning.patch
 io_uring-always-grab-lock-in-io_cancel_async_work.patch
 io_uring-don-t-drop-completion-lock-before-timer-is-fully-initialized.patch
 io_uring-have-io_kill_timeout-honor-the-request-references.patch
+bluetooth-add-cmd-validity-checks-at-the-start-of-hci_sock_ioctl.patch