Extracting prog: 3m39.118044916s
Minimizing prog: 1h14m49.797197046s
Simplifying prog options: 0s
Extracting C: 42.749393419s
Simplifying C: 11m40.739430853s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mount-mkdir-openat-write-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mount(0x0, 0x0, 0x0, 0x0, 0x0)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
write(0xffffffffffffffff, 0x0, 0x0)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mount-mkdir-openat-write-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mount(0x0, 0x0, 0x0, 0x0, 0x0)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
write(0xffffffffffffffff, 0x0, 0x0)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: WARNING in dlm_lowcomms_close
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mount-mkdir-openat-write
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mount(0x0, 0x0, 0x0, 0x0, 0x0)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
write(0xffffffffffffffff, 0x0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mount-mkdir-openat-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mount(0x0, 0x0, 0x0, 0x0, 0x0)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: WARNING in dlm_lowcomms_close
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mount-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mount(0x0, 0x0, 0x0, 0x0, 0x0)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: WARNING in dlm_lowcomms_close
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mount-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mount(0x0, 0x0, 0x0, 0x0, 0x0)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: WARNING in dlm_lowcomms_close
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(0x0, 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', 0x0, 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(0x0, 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(0x0, 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
program crashed: WARNING in dlm_lowcomms_close
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: WARNING in dlm_lowcomms_close
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: WARNING in dlm_lowcomms_close
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-mkdir-mkdir-rmdir
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='./my_configfs\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./my_configfs\x00', &(0x7f0000000200)='configfs\x00', 0x0, 0x0)
mkdir(&(0x7f0000000d00)='./my_configfs/dlm/cluster1/comms/1\x00', 0x1ff)
mkdir(&(0x7f0000000900)='./my_configfs/dlm/cluster1\x00', 0x1ff)
rmdir(&(0x7f0000000040)='./my_configfs/dlm/cluster1/comms/1\x00')

program crashed: WARNING in dlm_lowcomms_close
validation run: crashed=true
reproducing took 1h36m11.398670083s
repro crashed as (corrupted=false):
dlm: closing connection to node 1
------------[ cut here ]------------
!con
WARNING: fs/dlm/lowcomms.c:1455 at dlm_lowcomms_close+0x12d/0x470 fs/dlm/lowcomms.c:1455, CPU#0: syz.0.18/5947
Modules linked in:
CPU: 0 UID: 0 PID: 5947 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dlm_lowcomms_close+0x12d/0x470 fs/dlm/lowcomms.c:1455
Code: 09 ae 9d 00 eb a6 44 89 e1 80 e1 07 80 c1 03 38 c1 7c ac 4c 89 e7 e8 42 24 07 01 eb a2 e8 eb ad 9d 00 eb 05 e8 e4 ad 9d 00 90 <0f> 0b 90 44 89 f7 e8 48 72 4a 01 b8 fe ff ff ff 48 83 c4 20 5b 41
RSP: 0018:ffffc90003b8fc40 EFLAGS: 00010293
RAX: ffffffff81281a45 RBX: 0000000000000001 RCX: ffff888028dbdd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffffff95cf42e0
R10: 00000000088e0994 R11: 000000005f26ce64 R12: 0000000000000000
R13: ffffffff81281978 R14: 0000000000000000 R15: 0000000000000000
FS:  00005555800f8500(0000) GS:ffff888125c46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fb27a5e138 CR3: 0000000044e3e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drop_comm+0x61/0x190 fs/dlm/config.c:556
 client_drop_item fs/configfs/dir.c:970 [inline]
 configfs_rmdir+0x85f/0x950 fs/configfs/dir.c:1567
 vfs_rmdir+0x3e9/0x6b0 fs/namei.c:5381
 filename_rmdir+0x292/0x520 fs/namei.c:5438
 __do_sys_rmdir fs/namei.c:5461 [inline]
 __se_sys_rmdir+0x2e/0x140 fs/namei.c:5458
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1339fde0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff65cfe678 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f133a265fa0 RCX: 00007f1339fde0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007f133a075024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f133a265fac R14: 00007f133a265fa0 R15: 00007f133a265fa0
 </TASK>

final repro crashed as (corrupted=false):
dlm: closing connection to node 1
------------[ cut here ]------------
!con
WARNING: fs/dlm/lowcomms.c:1455 at dlm_lowcomms_close+0x12d/0x470 fs/dlm/lowcomms.c:1455, CPU#0: syz.0.18/5947
Modules linked in:
CPU: 0 UID: 0 PID: 5947 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dlm_lowcomms_close+0x12d/0x470 fs/dlm/lowcomms.c:1455
Code: 09 ae 9d 00 eb a6 44 89 e1 80 e1 07 80 c1 03 38 c1 7c ac 4c 89 e7 e8 42 24 07 01 eb a2 e8 eb ad 9d 00 eb 05 e8 e4 ad 9d 00 90 <0f> 0b 90 44 89 f7 e8 48 72 4a 01 b8 fe ff ff ff 48 83 c4 20 5b 41
RSP: 0018:ffffc90003b8fc40 EFLAGS: 00010293
RAX: ffffffff81281a45 RBX: 0000000000000001 RCX: ffff888028dbdd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffffff95cf42e0
R10: 00000000088e0994 R11: 000000005f26ce64 R12: 0000000000000000
R13: ffffffff81281978 R14: 0000000000000000 R15: 0000000000000000
FS:  00005555800f8500(0000) GS:ffff888125c46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fb27a5e138 CR3: 0000000044e3e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drop_comm+0x61/0x190 fs/dlm/config.c:556
 client_drop_item fs/configfs/dir.c:970 [inline]
 configfs_rmdir+0x85f/0x950 fs/configfs/dir.c:1567
 vfs_rmdir+0x3e9/0x6b0 fs/namei.c:5381
 filename_rmdir+0x292/0x520 fs/namei.c:5438
 __do_sys_rmdir fs/namei.c:5461 [inline]
 __se_sys_rmdir+0x2e/0x140 fs/namei.c:5458
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1339fde0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff65cfe678 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f133a265fa0 RCX: 00007f1339fde0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007f133a075024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f133a265fac R14: 00007f133a265fa0 R15: 00007f133a265fa0
 </TASK>