Bug#1033644: libwebkit2gtk-4.1-0: WebKitWebProcess constantly segfaulting

[Karo Gyoker]

Package: libwebkit2gtk-4.1-0
Version: 2.40.0-3
Severity: important
X-Debbugs-Cc: karogyoke...@gmail.com

Dear Maintainer,

If I try to open any page in epiphany-browser, nothing happens. The CPU is at 100%.
I can see it in dmesg that WebKitWebProcess is constantly segfaulting.

[14886.202609] WebKitWebProces[26945]: segfault at 48 ip b59e2128 sp bff5b889 error 6 in libwebkit2gtk-4.1.so.0.8.1[b3681000+2e85000] likely on CPU 0 (core 0, socket 0)
[14886.202671] Code: 00 00 00 c7 46 20 00 00 00 00 c7 46 24 00 00 00 00 c7 46 28 00 00 00 00 c7 46 2c 00 00 00 00 c4 46 34 00 d9 5e 44 d9 e8 d9 e0 <d9> 56 48 d9 5e 4c 8b 17 89 56 50 52 e8 37 9b 08 00 8b 57 04 89 56

It is happening since I have ran a dist-upgrade on bookworm.
If I recall correctly, after soft freeze and before hard feeze, it worked fine. I don't remember which version was that.

I cannot attach gdb as the pid is changing in every second.

cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 10
model name : AMD Athlon(tm)
stepping : 0
cpu MHz : 1143.879
cache size : 512 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow cpuid 3dnowprefetch vmmcall
bugs : fxsave_leak sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass
bogomips : 2287.75
clflush size : 32
cache_alignment : 32
address sizes : 34 bits physical, 32 bits virtual
power management: ts


-- System Information:
Debian Release: 12.0
APT prefers testing-security
APT policy: (500, 'testing-security'), (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 6.1.0-6-686-pae (SMP w/1 CPU thread; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libwebkit2gtk-4.1-0 depends on:
ii bubblewrap 0.8.0-2
ii gstreamer1.0-plugins-base 1.22.0-3
ii gstreamer1.0-plugins-good 1.22.0-5
ii libatk1.0-0 2.46.0-5
ii libavif15 0.11.1-1
ii libc6 2.36-8
ii libcairo2 1.16.0-7
ii libdrm2 2.4.114-1+b1
ii libenchant-2-2 2.3.3-2
ii libepoxy0 1.5.10-1
ii libfontconfig1 2.14.1-4
ii libfreetype6 2.12.1+dfsg-4
ii libgbm1 22.3.6-1+deb12u1
ii libgcc-s1 12.2.0-14
ii libgcrypt20 1.10.1-3
ii libgdk-pixbuf-2.0-0 2.42.10+dfsg-1+b1
ii libglib2.0-0 2.74.6-1
ii libgstreamer-gl1.0-0 1.22.0-3
ii libgstreamer-plugins-bad1.0-0 1.22.0-4
ii libgstreamer-plugins-base1.0-0 1.22.0-3
ii libgstreamer1.0-0 1.22.0-2
ii libgtk-3-0 3.24.37-2
ii libharfbuzz-icu0 6.0.0+dfsg-3
ii libharfbuzz0b 6.0.0+dfsg-3
ii libhyphen0 2.8.8-7
ii libicu72 72.1-3
ii libjavascriptcoregtk-4.1-0 2.40.0-3
ii libjpeg62-turbo 1:2.1.5-2
ii liblcms2-2 2.14-2
ii libmanette-0.2-0 0.2.6-3+b1
ii libopenjp2-7 2.5.0-1+b1
ii libpango-1.0-0 1.50.12+ds-1
ii libpng16-16 1.6.39-2
ii libseccomp2 2.5.4-1+b3
ii libsecret-1-0 0.20.5-3
ii libsoup-3.0-0 3.2.2-2
ii libsqlite3-0 3.40.1-2
ii libstdc++6 12.2.0-14
ii libsystemd0 252.6-1
ii libtasn1-6 4.19.0-2
ii libwayland-client0 1.21.0-1
ii libwayland-egl1 1.21.0-1
ii libwayland-server0 1.21.0-1
ii libwebp7 1.2.4-0.1
ii libwebpdemux2 1.2.4-0.1
ii libwoff1 1.0.2-2
ii libwpe-1.0-1 1.14.0-1
ii libwpebackend-fdo-1.0-1 1.14.0-1
ii libx11-6 2:1.8.4-2
ii libxcomposite1 1:0.4.5-1
ii libxdamage1 1:1.1.6-1
ii libxml2 2.9.14+dfsg-1.1+b3
ii libxslt1.1 1.1.35-1
ii xdg-dbus-proxy 0.1.4-3
ii zlib1g 1:1.2.13.dfsg-1

Versions of packages libwebkit2gtk-4.1-0 recommends:
ii gstreamer1.0-gl 1.22.0-3
ii gstreamer1.0-libav 1.22.0-2
ii gstreamer1.0-plugins-bad 1.22.0-4
ii libgl1-mesa-dri 22.3.6-1+deb12u1
ii xdg-desktop-portal-gtk 1.14.1-1

Versions of packages libwebkit2gtk-4.1-0 suggests:
pn gstreamer1.0-alsa <none>

-- no debconf information

[Alberto Garcia]

On Wed, Mar 29, 2023 at 06:22:25AM -0400, Karo Gyoker wrote:

> If I try to open any page in epiphany-browser, nothing happens. The CPU is at 100%.
> I can see it in dmesg that WebKitWebProcess is constantly segfaulting.
>

> cat /proc/cpuinfo
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 6
> model : 10
> model name : AMD Athlon(tm)

Can you try to set JavaScriptCoreUseJIT=0 in the environment and try
again? Does it still crash?

$ export JavaScriptCoreUseJIT=0
$ epiphany-browser

Berto

[karogyoker999]

Yes, it is still crashing by running it that way.

Alberto Garcia <be...@igalia.com> ezt írta (időpont: 2023. márc. 29.,
Sze, 12:58):

[Alberto Garcia]

On Wed, Mar 29, 2023 at 02:33:14PM +0200, karogyoker999 wrote:
> Yes, it is still crashing by running it that way.

Do you think you would be able to obtain a core dump from one of those
crashes?

Berto

[karogyoker999]

For the others watching (if any): I have sent the core dump to Berto.

[Alberto Garcia]

On Wed, Mar 29, 2023 at 05:01:00PM +0200, karogyoker999 wrote:
> For the others watching (if any): I have sent the core dump to Berto.

The stack trace, for reference:

Core was generated by `/usr/lib/i386-linux-gnu/webkit2gtk-4.1/WebKitWebProcess 12 18'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0xb59e2128 in WebCore::Font::Font () at ./Source/WebCore/platform/graphics/Font.cpp:89
89 , m_allowsAntialiasing(true)
[Current thread is 1 (Thread 0xac0b3a00 (LWP 3370))]
(gdb) bt
#0 0xb59e2128 in WebCore::Font::Font () at ./Source/WebCore/platform/graphics/Font.cpp:89
#1 0xd0015949 in ?? ()
#2 0x010159eb in ?? ()
#3 0x00000000 in ?? ()

Berto

[karogyoker999]

Control: tags -1 + unreproducible

The issue was due to faulty RAM. No further action required.

[karogyoker999]

Control: severity -1 minor