free(): invalid size

[zuavra]

Describe the bug
The Droidcam Linux client crashes after establishing video connection with Android app. I can see the image on the phone for a split second before the client crashes.

Expected behavior
Droidcam client should not crash.

Additional context
Client output during the crash:

$ droidcam
Video: /dev/video0
Audio: hw:0,1,0
free(): invalid size
Aborted                    (core dumped) droidcam

There is no core file in the current directory.

Droidcam client version is 2.1.5. Android app is latest from Google Play. Linux distro is Manjaro, running kernel 7.0.3.

[zuavra]

The crash happens with Droidcam client compiled from source downloaded from the following URL:
https://github.com/dev47apps/droidcam-linux-client/archive/v2.1.5.tar.gz

That tarball is the URL begin used by the droidcam AUR package on Arch-based distros:
https://aur.archlinux.org/packages/droidcam

The kernel module from that package is working fine, only the client app (freshly compiled) is crashing.

Using the client from the latest binary zip with the kernel module from the .tar.gz package works fine:
https://files.dev47apps.net/linux/droidcam_2.1.5.zip

I will be using the binary from the zip as a workaround for the time being, and will look into whether the bug can be reproduced using the latest git head.

[EthanZeigler]

I had anthropic claude create a MAKEPKG to install the binary zip for anyone else running into this on arch who wants a quick fix. Verified it works correctly (and saved a DnD night).

pkgname=droidcam-client
pkgver=2.1.5
pkgrel=1
pkgdesc="DroidCam Linux client – use your phone as a webcam (statically linked release binary)"
arch=('x86_64')
url="https://github.com/dev47apps/droidcam-linux-client"
license=('GPL2')
depends=(
    'alsa-lib'
    'speex'
    'gtk3'
    'libappindicator-gtk3'
)
source=("https://github.com/dev47apps/droidcam-linux-client/releases/download/v${pkgver}/droidcam_${pkgver}.zip")
sha256sums=('SKIP')
noextract=("droidcam_${pkgver}.zip")

prepare() {
    cd "${srcdir}"
    unzip -o "droidcam_${pkgver}.zip"
}

package() {
    cd "${srcdir}"

    install -Dm755 droidcam      "${pkgdir}/usr/bin/droidcam"
    install -Dm755 droidcam-cli  "${pkgdir}/usr/bin/droidcam-cli"
    install -Dm644 icon2.png     "${pkgdir}/usr/share/pixmaps/droidcam.png"
    install -Dm644 droidcam.desktop \
        "${pkgdir}/usr/share/applications/droidcam.desktop"
    install -Dm644 LICENSE \
        "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
}