[openwrt/openwrt] libusb: Fix parsing of descriptors for multi-configuration devices

[LEDE Commits]

aparcar pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/4b37e3bc2b2a079c996b6d97b8d3dbbd4ba6eb62

commit 4b37e3bc2b2a079c996b6d97b8d3dbbd4ba6eb62
Author: Georgi Valkov <gvalkov at abv.bg>
AuthorDate: Wed Feb 3 09:41:54 2021 +0200

    libusb: Fix parsing of descriptors for multi-configuration devices
    
    Prerequisite patch:
    Correct a typo in the Changelog and clean up a stray file
    
    Fix changes in libusb which introduced a regression:
    Commit e2be556bd2 ("linux_usbfs: Parse config descriptors during device
    initialization") introduced a regression for devices with multiple
    configurations. The logic that verifies the reported length of the
    configuration descriptors failed to count the length of the
    configuration descriptor itself and would truncate the actual length by
    9 bytes, leading to a parsing error for subsequent descriptors.
    
    Signed-off-by: Georgi Valkov <gvalkov at abv.bg>
---
 package/libs/libusb/Makefile                       |  2 +-
 ...ypo-in-the-Changelog-and-clean-up-a-stray.patch | 29 ++++++++++
 ...-Fix-parsing-of-descriptors-for-multi-con.patch | 61 ++++++++++++++++++++++
 3 files changed, 91 insertions(+), 1 deletion(-)

diff --git a/package/libs/libusb/Makefile b/package/libs/libusb/Makefile
index e931536339..6b80b3848d 100644
--- a/package/libs/libusb/Makefile
+++ b/package/libs/libusb/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libusb
 PKG_VERSION:=1.0.24
-PKG_RELEASE:=1
+PKG_RELEASE:=$(AUTORELEASE)
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=\
diff --git a/package/libs/libusb/patches/001-Correct-a-typo-in-the-Changelog-and-clean-up-a-stray.patch b/package/libs/libusb/patches/001-Correct-a-typo-in-the-Changelog-and-clean-up-a-stray.patch
new file mode 100644
index 0000000000..b17d6178d3
--- /dev/null
+++ b/package/libs/libusb/patches/001-Correct-a-typo-in-the-Changelog-and-clean-up-a-stray.patch
@@ -0,0 +1,29 @@
+From 369af149e3ad92514a2d24f112cedfeb7acaf558 Mon Sep 17 00:00:00 2001
+From: Chris Dickens <christopher.a.dickens at gmail.com>
+Date: Sun, 13 Dec 2020 15:46:27 -0800
+Subject: [PATCH] Correct a typo in the Changelog and clean up a stray file
+
+Signed-off-by: Chris Dickens <christopher.a.dickens at gmail.com>
+---
+ ChangeLog             | 2 +-
+ libusb/version_nano.h | 2 +-
+ test                  | 0
+ 3 files changed, 2 insertions(+), 2 deletions(-)
+ delete mode 100644 test
+
+--- a/ChangeLog
++++ b/ChangeLog
+@@ -12,7 +12,7 @@ visit: http://log.libusb.info
+ * Darwin (macOS): use IOUSBDevice as darwin_device_class explicitly (#693)
+ * Linux: Drop support for kernel older than 2.6.32
+ * Linux: Provide an event thread name (#689)
+-* Linux: Wait until all USBs have been reaped before freeing them (#607)
++* Linux: Wait until all URBs have been reaped before freeing them (#607)
+ * NetBSD: Recognize device timeouts (#710)
+ * OpenBSD: Allow opening ugen devices multiple times (#763)
+ * OpenBSD: Support libusb_get_port_number() (#764)
+--- a/libusb/version_nano.h
++++ b/libusb/version_nano.h
+@@ -1 +1 @@
+-#define LIBUSB_NANO 11584
++#define LIBUSB_NANO 11585
diff --git a/package/libs/libusb/patches/002-linux_usbfs-Fix-parsing-of-descriptors-for-multi-con.patch b/package/libs/libusb/patches/002-linux_usbfs-Fix-parsing-of-descriptors-for-multi-con.patch
new file mode 100644
index 0000000000..a53a8900de
--- /dev/null
+++ b/package/libs/libusb/patches/002-linux_usbfs-Fix-parsing-of-descriptors-for-multi-con.patch
@@ -0,0 +1,61 @@
+From f6d2cb561402c3b6d3627c0eb89e009b503d9067 Mon Sep 17 00:00:00 2001
+From: Chris Dickens <christopher.a.dickens at gmail.com>
+Date: Sun, 13 Dec 2020 15:49:19 -0800
+Subject: [PATCH] linux_usbfs: Fix parsing of descriptors for
+ multi-configuration devices
+
+Commit e2be556bd2 ("linux_usbfs: Parse config descriptors during device
+initialization") introduced a regression for devices with multiple
+configurations. The logic that verifies the reported length of the
+configuration descriptors failed to count the length of the
+configuration descriptor itself and would truncate the actual length by
+9 bytes, leading to a parsing error for subsequent descriptors.
+
+Closes #825
+
+Signed-off-by: Chris Dickens <christopher.a.dickens at gmail.com>
+---
+ libusb/os/linux_usbfs.c | 12 ++++++++----
+ libusb/version_nano.h   |  2 +-
+ 2 files changed, 9 insertions(+), 5 deletions(-)
+
+--- a/libusb/os/linux_usbfs.c
++++ b/libusb/os/linux_usbfs.c
+@@ -641,7 +641,12 @@ static int seek_to_next_config(struct li
+ 	uint8_t *buffer, size_t len)
+ {
+ 	struct usbi_descriptor_header *header;
+-	int offset = 0;
++	int offset;
++
++	/* Start seeking past the config descriptor */
++	offset = LIBUSB_DT_CONFIG_SIZE;
++	buffer += LIBUSB_DT_CONFIG_SIZE;
++	len -= LIBUSB_DT_CONFIG_SIZE;
+ 
+ 	while (len > 0) {
+ 		if (len < 2) {
+@@ -718,7 +723,7 @@ static int parse_config_descriptors(stru
+ 		}
+ 
+ 		if (priv->sysfs_dir) {
+-			 /*
++			/*
+ 			 * In sysfs wTotalLength is ignored, instead the kernel returns a
+ 			 * config descriptor with verified bLength fields, with descriptors
+ 			 * with an invalid bLength removed.
+@@ -727,8 +732,7 @@ static int parse_config_descriptors(stru
+ 			int offset;
+ 
+ 			if (num_configs > 1 && idx < num_configs - 1) {
+-				offset = seek_to_next_config(ctx, buffer + LIBUSB_DT_CONFIG_SIZE,
+-							     remaining - LIBUSB_DT_CONFIG_SIZE);
++				offset = seek_to_next_config(ctx, buffer, remaining);
+ 				if (offset < 0)
+ 					return offset;
+ 				sysfs_config_len = (uint16_t)offset;
+--- a/libusb/version_nano.h
++++ b/libusb/version_nano.h
+@@ -1 +1 @@
+-#define LIBUSB_NANO 11585
++#define LIBUSB_NANO 11586