*** This bug is a duplicate of bug 1956915 ***
https://bugs.launchpad.net/bugs/1956915
Verified internally with Ubuntu 20.04.4 + libegl-mesa0 version
"21.2.6-0ubuntu0.1~20.04.2" and confirmed the crash issue is resolved.
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https://bugs.launchpad.net/bugs/1946621
Title:
Crash in libegl-mesa0 (eglReleaseThread)
Status in Mesa:
Unknown
Status in mesa package in Ubuntu:
Fix Released
Status in mesa source package in Focal:
New
Status in mesa source package in Impish:
New
Bug description:
Crash in libegl-mesa0 (in eglReleaseThread API), please find the
backtrace:
#0 0x0000fffff7c86ac4 in __GI___pthread_mutex_lock (mutex=mutex@entry=0x8)
at pthread_mutex_lock.c:67
#1 0x0000fffff4a7d110 in mtx_lock (mtx=0x8) at
../include/c11/threads_posix.h:223
#2 eglReleaseThread () at ../src/egl/main/eglapi.c:1713
#3 0x0000fffff6c115b8 in eglReleaseThread () at
/lib/aarch64-linux-gnu/libEGL.so.1
#4 0x0000fffff7fdac00 in () at /lib/ld-linux-aarch64.so.1
#5 0x0000fffff7b4284c in __run_exit_handlers
(status=0, listp=0xfffff7c76680 <__exit_funcs>,
run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at
exit.c:108
#6 0x0000fffff7b429dc in __GI_exit (status=<optimized out>) at exit.c:139
#7 0x0000fffff7b2d094 in __libc_start_main (main=
0xaaaaaaaa3530 <main>, argc=13, argv=0xfffffffff488, init=<optimized
out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=<optimized
out>)
at ../csu/libc-start.c:342
#8 0x0000aaaaaaaa4014 in _start ()
It crashes at:
https://github.com/mesa3d/mesa/blob/mesa-21.0.3/src/egl/main/eglapi.c#L1713.
'disp' pointer is being NULL in this case.
Actually nvidia's EGL backend is being loaded by glvnd in this case.
But the eglReleaseThread() implementation of glvnd calls the
eglReleaseThread() API of all the vendors, that's how it end-up
calling the eglReleaseThread() API of Mesa backend. Refer:
https://github.com/NVIDIA/libglvnd/blob/master/src/EGL/libegl.c#L806
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
apt-cache policy libegl-mesa0
libegl-mesa0:
Installed: 21.0.3-0ubuntu0.3~20.04.2
Candidate: 21.0.3-0ubuntu0.3~20.04.2
Version table:
*** 21.0.3-0ubuntu0.3~20.04.2 500
500 http://ports.ubuntu.com/ubuntu-ports focal-updates/main arm64
Packages
100 /var/lib/dpkg/status
20.0.4-2ubuntu1 500
500 http://ports.ubuntu.com/ubuntu-ports focal/main arm64 Packages
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