1484106 - WebGL doesn't initialise on Intel HD 4400/Mesa 18.1.6 when security.sandbox.content.level >= 3

Status: RESOLVED DUPLICATE of bug 1480755

(Core :: Security: Process Sandboxing, defect)

Description

[angelsl]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0
Build ID: 20180813190114

Steps to reproduce:

1. Have security.sandbox.content.level at the default of 4, or 3.
2. Go to http://webglreport.com/.


Actual results:

WebGL fails to initialise.

The following is printed to stdout/stderr (did not verify which):
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: Version 4 or later of flush extension not found
libGL error: failed to load driver: i915
libGL error: MESA-LOADER: failed to retrieve device information



Expected results:

WebGL initialises successfully.

Comment 1

[angelsl]

Seems like this is not Intel specific. Happens on my machine running amdgpu too.

strace+stdout:

    lstat("/sys", {st_mode=027177454000, st_size=0, ...}) = 6
    --- SIGSYS {si_signo=SIGSYS, si_code=SYS_SECCOMP, si_errno=EINTR, si_call_addr=<snip>, si_syscall=__NR_lstat, si_arch=AUDIT_ARCH_X86_64} ---
    lstat("/sys", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
    lstat("/sys", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
    libGL error: MESA-LOADER: failed to retrieve device information

Comment 2

[angelsl]

Yeah, this looks like the same bug as that. Didn't manage to find that one, my bad.