Public bug reported:
I got this crash notification as soon as I started a new session on my
laptop
ProblemType: Crash
DistroRelease: Ubuntu 25.10
Package: lxqt-session 2.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 6.17.0-3.3-generic 6.17.0-rc3
Uname: Linux 6.17.0-3-generic x86_64
ApportVersion: 2.33.1-0ubuntu2
Architecture: amd64
AssertionMessage: malloc_consolidate(): unaligned fastbin chunk detected
CasperMD5CheckResult: unknown
CurrentDesktop: LXQt
Date: Tue Sep 9 22:19:41 2025
ExecutablePath: /usr/bin/lxqt-session
InstallationDate: Installed on 2025-09-09 (4 days ago)
InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
ProcCmdline: lxqt-session
Signal: 6
SignalName: SIGABRT
SourcePackage: lxqt-session
StacktraceTop:
__libc_message_impl (fmt=fmt@entry=0x7795201de92a "%s\n") at
../sysdeps/posix/libc_fatal.c:138
malloc_printerr (str=str@entry=0x7795201e1918 "malloc_consolidate(): unaligned
fastbin chunk detected") at ./malloc/malloc.c:5882
malloc_consolidate (av=<optimized out>) at ./malloc/malloc.c:4952
_int_free_maybe_consolidate (av=0x779520212ac0 <main_arena>, size=<optimized
out>) at ./malloc/malloc.c:4885
_int_free_chunk (av=0x779520212ac0 <main_arena>, p=<optimized out>,
size=<optimized out>, have_lock=<optimized out>) at ./malloc/malloc.c:4717
Title: lxqt-session assert failure: malloc_consolidate(): unaligned fastbin
chunk detected
UpgradeStatus: Upgraded to questing on 2025-09-09 (4 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
separator:
---
ProblemType: Bug
ApportVersion: 2.33.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: LXQt
DistroRelease: Ubuntu 25.10
InstallationDate: Installed on 2025-09-09 (4 days ago)
InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
Package: lxqt-session 2.2.0-0ubuntu1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 6.17.0-3.3-generic 6.17.0-rc3
Tags: questing
Uname: Linux 6.17.0-3-generic x86_64
UpgradeStatus: Upgraded to questing on 2025-09-09 (4 days ago)
UserGroups: N/A
_MarkForUpload: True
** Affects: lxqt-session (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-collected apport-crash need-amd64-retrace questing
** Information type changed from Private to Public
** Tags added: apport-collected
** Description changed:
I got this crash notification as soon as I started a new session on my
laptop
ProblemType: Crash
DistroRelease: Ubuntu 25.10
Package: lxqt-session 2.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 6.17.0-3.3-generic 6.17.0-rc3
Uname: Linux 6.17.0-3-generic x86_64
ApportVersion: 2.33.1-0ubuntu2
Architecture: amd64
AssertionMessage: malloc_consolidate(): unaligned fastbin chunk detected
CasperMD5CheckResult: unknown
CurrentDesktop: LXQt
Date: Tue Sep 9 22:19:41 2025
ExecutablePath: /usr/bin/lxqt-session
InstallationDate: Installed on 2025-09-09 (4 days ago)
InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
ProcCmdline: lxqt-session
Signal: 6
SignalName: SIGABRT
SourcePackage: lxqt-session
StacktraceTop:
__libc_message_impl (fmt=fmt@entry=0x7795201de92a "%s\n") at
../sysdeps/posix/libc_fatal.c:138
malloc_printerr (str=str@entry=0x7795201e1918 "malloc_consolidate():
unaligned fastbin chunk detected") at ./malloc/malloc.c:5882
malloc_consolidate (av=<optimized out>) at ./malloc/malloc.c:4952
_int_free_maybe_consolidate (av=0x779520212ac0 <main_arena>, size=<optimized
out>) at ./malloc/malloc.c:4885
_int_free_chunk (av=0x779520212ac0 <main_arena>, p=<optimized out>,
size=<optimized out>, have_lock=<optimized out>) at ./malloc/malloc.c:4717
Title: lxqt-session assert failure: malloc_consolidate(): unaligned fastbin
chunk detected
UpgradeStatus: Upgraded to questing on 2025-09-09 (4 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
separator:
+ ---
+ ProblemType: Bug
+ ApportVersion: 2.33.1-0ubuntu2
+ Architecture: amd64
+ CasperMD5CheckResult: unknown
+ CurrentDesktop: LXQt
+ DistroRelease: Ubuntu 25.10
+ InstallationDate: Installed on 2025-09-09 (4 days ago)
+ InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
+ Package: lxqt-session 2.2.0-0ubuntu1
+ PackageArchitecture: amd64
+ ProcVersionSignature: Ubuntu 6.17.0-3.3-generic 6.17.0-rc3
+ Tags: questing
+ Uname: Linux 6.17.0-3-generic x86_64
+ UpgradeStatus: Upgraded to questing on 2025-09-09 (4 days ago)
+ UserGroups: N/A
+ _MarkForUpload: True
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2122738
Title:
lxqt-session assert failure: malloc_consolidate(): unaligned fastbin
chunk detected
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https://bugs.launchpad.net/ubuntu/+source/lxqt-session/+bug/2122738/+subscriptions
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