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#1 2025-07-23 17:57:29

SanTDR
Member
Registered: 2015-09-09
Posts: 10

steamwebhelper occasionally dumps core with SIGILL

Steam has been crashing on me on a few occasions. I couldn't figure out the cause, cpu and memory usage right before crashes are normal and as far as I'm aware I'm not doing any specific action that could prompt it.

Fri 2025-07-04 20:23:52 CEST   7082 1000 1000 SIGSEGV missing  /home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper                                -
Thu 2025-07-17 14:34:50 CEST   5215 1000 1000 SIGILL  present  /home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper                            57.5M
Wed 2025-07-23 19:04:43 CEST   2677 1000 1000 SIGILL  present  /home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper                            57.1M

This is the coredump of my most recent crash:

           PID: 2677 (steamwebhelper)
           UID: 1000 (nyx)
           GID: 1000 (nyx)
        Signal: 4 (ILL)
     Timestamp: Wed 2025-07-23 19:04:38 CEST (27min ago)
  Command Line: /home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper --type=zygote $'--user-agent-product=Valve Steam Client' --lang=en_US.UTF-8 --user-data-dir=/home/nyx/.local/share/Steam/config/htmlcache >
    Executable: /home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper
 Control Group: /user.slice/user-1000.slice/session-2.scope
          Unit: session-2.scope
         Slice: user-1000.slice
       Session: 2
     Owner UID: 1000 (nyx)
       Boot ID: bf478d40b4034cb698e08b5fe1552ad8
    Machine ID: bf76cd8c61ed46e99c63c291fffe079c
      Hostname: arch
       Storage: /var/lib/systemd/coredump/core.steamwebhelper.1000.bf478d40b4034cb698e08b5fe1552ad8.2677.1753290278000000.zst (present)
  Size on Disk: 57.1M
       Message: Process 2677 (steamwebhelper) of user 1000 dumped core.
                
                Stack trace of thread 1:
                #0  0x00007fd975b0e27f n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x670e27f)
                #1  0x00007fd975b0dd4b n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x670dd4b)
                #2  0x00007fd975b0e2f9 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x670e2f9)
                #3  0x00007fd971df75ca n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x29f75ca)
                #4  0x00007fd975ef21f1 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x6af21f1)
                #5  0x00007fd975f0098b n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x6b0098b)
                #6  0x00007fd975eedf05 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x6aedf05)
                #7  0x00007fd971d68ebf n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x2968ebf)
                #8  0x00007fd975f1297f n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x6b1297f)
                #9  0x00007fd975b5e32f n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x675e32f)
                #10 0x00007fd975b7f246 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x677f246)
                #11 0x00007fd975b1516c n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x671516c)
                #12 0x00007fd975b7f9e1 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x677f9e1)
                #13 0x00007fd975b3f97e n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x673f97e)
                #14 0x00007fd97b7aba44 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0xc3aba44)
                #15 0x00007fd9755ef9e5 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x61ef9e5)
                #16 0x00007fd9755f00f9 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x61f00f9)
                #17 0x00007fd9755f0e95 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x61f0e95)
                #18 0x00007fd9755ef050 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x61ef050)
                #19 0x00007fd971d2ff5c n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x292ff5c)
                #20 0x00007fd971d18cc7 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x2918cc7)
                #21 0x00007fd971c87b11 cef_execute_process (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x2887b11)
                #22 0x000055f9d596596e n/a (/home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper + 0x7d196e)
                #23 0x000055f9d56824ef n/a (/home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper + 0x4ee4ef)
                #24 0x000055f9d568afb2 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper + 0x4f6fb2)
                #25 0x00007fd96e6376b5 n/a (/run/host/usr/lib/libc.so.6 + 0x276b5)
                #26 0x00007fd96e637769 n/a (/run/host/usr/lib/libc.so.6 + 0x27769)
                #27 0x000055f9d549602a n/a (/home/nyx/.local/share/Steam/ubuntu12_64/steamwebhelper + 0x30202a)
                
                Stack trace of thread 3:
                #0  0x00007fd96e6ade22 n/a (/run/host/usr/lib/libc.so.6 + 0x9de22)
                #1  0x00007fd96e6a264c n/a (/run/host/usr/lib/libc.so.6 + 0x9264c)
                #2  0x00007fd96e6a4d1e n/a (/run/host/usr/lib/libc.so.6 + 0x94d1e)
                #3  0x00007fd975bb68f6 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x67b68f6)
                #4  0x00007fd975be1639 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x67e1639)
                #5  0x00007fd975b5b12c n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x675b12c)
                #6  0x00007fd975b9a34d n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x679a34d)
                #7  0x00007fd975b99328 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x6799328)
                #8  0x00007fd975b98f5d n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x6798f5d)
                #9  0x00007fd975b98e6d n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x6798e6d)
                #10 0x00007fd975bb70e3 n/a (/home/nyx/.local/share/Steam/ubuntu12_64/libcef.so + 0x67b70e3)
                #11 0x00007fd96e6a57eb n/a (/run/host/usr/lib/libc.so.6 + 0x957eb)
                #12 0x00007fd96e728fb4 n/a (/run/host/usr/lib/libc.so.6 + 0x118fb4)
                ELF object binary architecture: AMD x86-64

This is the state of my machine:

journal entries when the crash occurred

uname -a:

Linux arch 6.15.7-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 17 Jul 2025 21:05:29 +0000 x86_64 GNU/Linux

glxinfo -B:

name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Intel (0x8086)
    Device: Mesa Intel(R) UHD Graphics 620 (KBL GT2) (0x5917)
    Version: 25.1.6
    Accelerated: yes
    Video memory: 31837MB
    Unified memory: yes
    Preferred profile: core (0x1)
    Max core profile version: 4.6
    Max compat profile version: 4.6
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) UHD Graphics 620 (KBL GT2)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 25.1.6-arch1.1
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 4.6 (Compatibility Profile) Mesa 25.1.6-arch1.1
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 25.1.6-arch1.1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

lscpu:

Architecture:                x86_64
  CPU op-mode(s):            32-bit, 64-bit
  Address sizes:             39 bits physical, 48 bits virtual
  Byte Order:                Little Endian
CPU(s):                      8
  On-line CPU(s) list:       0-7
Vendor ID:                   GenuineIntel
  Model name:                Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
    CPU family:              6
    Model:                   142
    Thread(s) per core:      2
    Core(s) per socket:      4
    Socket(s):               1
    Stepping:                10
    CPU(s) scaling MHz:      31%
    CPU max MHz:             4200.0000
    CPU min MHz:             400.0000
    BogoMIPS:                4199.88
    Flags:                   fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 c
                             lflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp 
                             lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop
                             _tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2
                              ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc
                             _deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid
                             _fault epb pti ssbd ibrs ibpb stibp tpr_shadow flexpriority ept vpid ept_
                             ad fsgsbase tsc_adjust sgx bmi1 avx2 smep bmi2 erms invpcid mpx rdseed ad
                             x smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat
                              pln pts hwp hwp_notify hwp_act_window hwp_epp vnmi md_clear flush_l1d ar
                             ch_capabilities
Virtualization features:     
  Virtualization:            VT-x
Caches (sum of all):         
  L1d:                       128 KiB (4 instances)
  L1i:                       128 KiB (4 instances)
  L2:                        1 MiB (4 instances)
  L3:                        8 MiB (1 instance)
NUMA:                        
  NUMA node(s):              1
  NUMA node0 CPU(s):         0-7
Vulnerabilities:             
  Gather data sampling:      Mitigation; Microcode
  Ghostwrite:                Not affected
  Indirect target selection: Not affected
  Itlb multihit:             KVM: Mitigation: VMX disabled
  L1tf:                      Mitigation; PTE Inversion; VMX conditional cache flushes, SMT vulnerable
  Mds:                       Mitigation; Clear CPU buffers; SMT vulnerable
  Meltdown:                  Mitigation; PTI
  Mmio stale data:           Mitigation; Clear CPU buffers; SMT vulnerable
  Reg file data sampling:    Not affected
  Retbleed:                  Mitigation; IBRS
  Spec rstack overflow:      Not affected
  Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
  Spectre v1:                Mitigation; usercopy/swapgs barriers and __user pointer sanitization
  Spectre v2:                Mitigation; IBRS; IBPB conditional; STIBP conditional; RSB filling; PBRSB
                             -eIBRS Not affected; BHI Not affected
  Srbds:                     Mitigation; Microcode
  Tsa:                       Not affected
  Tsx async abort:           Mitigation; TSX disabled

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