gnome-shell crashed with SIGSEGV in __GI_getenv("NTCONFIG_SYSROOT") from IA__FcConfigGetSysRoot()

[corrado venturini]

https://errors.ubuntu.com/problem/dea417d91da22f2d4de0980b3be8d98be8f8c100

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Just started, only firefox-trunk active

ProblemType: Crash
DistroRelease: Ubuntu 22.10
Package: gnome-shell 42.2-0ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
Uname: Linux 5.15.0-27-generic x86_64
ApportVersion: 2.21.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: GNOME-Greeter:GNOME
Date: Sat Jun 18 15:41:24 2022
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
GsettingsChanges:

InstallationDate: Installed on 2022-05-14 (34 days ago)
InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Alpha amd64 (20220512)
ProcCmdline: /usr/bin/gnome-shell
RelatedPackageVersions: mutter-common 42.2-1ubuntu1
SegvAnalysis:
 Segfault happened at: 0x7f6ea4325c1d <__GI_getenv+173>: cmp (%r12),%bp
 PC (0x7f6ea4325c1d) ok
 source "(%r12)" (0xfca16778d75cc123) not located in a known VMA region (needed readable region)!
 destination "%bp" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gnome-shell
StacktraceTop:
 __GI_getenv (name=0x7f6ea355531e "NTCONFIG_SYSROOT") at ./stdlib/getenv.c:84
 ?? () from /lib/x86_64-linux-gnu/libfontconfig.so.1
 ?? () from /lib/x86_64-linux-gnu/libfontconfig.so.1
 FcConfigBuildFonts () from /lib/x86_64-linux-gnu/libfontconfig.so.1
 ?? () from /lib/x86_64-linux-gnu/libfontconfig.so.1
Title: gnome-shell crashed with SIGSEGV in __GI_getenv()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
separator:

[Daniel van Vugt (vanvugt)]

Tracking in https://errors.ubuntu.com/problem/dea417d91da22f2d4de0980b3be8d98be8f8c100

[Daniel van Vugt (vanvugt)]

Crashing in getenv with a valid parameter like this should not be possible so I think some heap corruption must have occurred before the crash.

[Apport retracing service (apport)]

StacktraceTop:
 __GI_getenv (name=0x7f6ea355531e "NTCONFIG_SYSROOT", name@entry=0x7f6ea355531c "FONTCONFIG_SYSROOT") at ./stdlib/getenv.c:84
 IA__FcConfigGetSysRoot (config=<optimized out>) at /build/fontconfig-Aho6Ty/fontconfig-2.13.1/src/fccfg.c:2467
 IA__FcConfigGetSysRoot (config=<optimized out>) at /build/fontconfig-Aho6Ty/fontconfig-2.13.1/src/fccfg.c:2455
 FcDirCacheReadUUID (dir=dir@entry=0x7f6e68003390 "/usr/share/fonts/truetype/lohit-oriya", config=config@entry=0x7f6e68000b70) at /build/fontconfig-Aho6Ty/fontconfig-2.13.1/src/fccache.c:186
 IA__FcDirCacheLoad (cache_file=0x0, config=0x7f6e68000b70, dir=0x7f6e68003390 "/usr/share/fonts/truetype/lohit-oriya") at /build/fontconfig-Aho6Ty/fontconfig-2.13.1/src/fccache.c:1054

[Mario Limonciello (superm1)]

> Crashing in getenv with a valid parameter like this should not be possible so I think some heap corruption must have occurred before the crash.

So at least as a hint coming from a report that was marked as a duplicate of this - at least for me it's specifically when the system had a monitor connected and it was disconnected that this issue occurs.

[corrado venturini (corradoventu)]

No longer occurred due to fix or new version. Marked as Invalid.

[Daniel van Vugt (vanvugt)]

Indeed we're not seeing any crashes in GNOME 44 or later.

https://errors.ubuntu.com/problem/9f4438fb1392d7cb429e71e81d5914f1ab9aa745
https://errors.ubuntu.com/problem/269b8613775da29ee226a10978d3f4439cb4a223
https://errors.ubuntu.com/problem/77e3afdc803e196d4508ab14c78333926f0bd54c
https://errors.ubuntu.com/problem/dea417d91da22f2d4de0980b3be8d98be8f8c100

I just wish we knew what fixed it because jammy will continue to hit the problem.