[Regression 1.0.24] Device is not enumerated on Linux

[Lekensteyn]

After upgrading from 1.0.23-3 to 1.0.24-1 on Arch Linux, lsusb fails to show an iPhone 12 Pro. As usbmuxd depends on libusb for enumeration, that also failed to find any devices. git bisect pointed to:

e2be556 is the first bad commit

commit e2be556bd262cd260bebe3fc724509692537eba3
Author: Chris Dickens <christopher.a.dickens@gmail.com>
Date:   Wed Apr 29 12:39:35 2020 -0700

    linux_usbfs: Parse config descriptors during device initialization
    
    Do the work ahead of time and cache the results so that fetching config
    descriptors becomes a trivial operation.
    
    Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>

 libusb/os/linux_usbfs.c | 263 ++++++++++++++++++++++++++----------------------
 libusb/version_nano.h   |   2 +-
 2 files changed, 145 insertions(+), 120 deletions(-)

Automated the bisect with git bisect run ./bisect.sh and

bisect.sh

#!/bin/sh
git describe --tags
autoreconf -ivf || exit 128
mkdir -p build
cd build
../configure && make -j10 || exit 128

LD_LIBRARY_PATH=libusb/.libs ldd /bin/lsusb | grep -F .libs || { echo "Bad!"; exit 128; }
out=$(LD_LIBRARY_PATH=libusb/.libs lsusb)
echo "$out"
echo .
echo "$out" | grep Apple

Further info:

• lsusb -d05ac: -v output: lsusb-d05ac-v.txt
• Issue is still present on git master (v1.0.24-7-g073f229fd11f).
• Reproduced on both Linux 5.9.13 and 5.10.2.
• Downstream bug report: https://bugs.archlinux.org/task/69121

[dickens]

This was fixed in f6d2cb5. Refer to #825

[Lekensteyn]

Thank you! I could confirm that the issue was fixed on git master, but after switching branches I accidentally forgot to rebuild libusb.

Happy holidays! 🎉