Extracting prog: 6m35.291242996s
Minimizing prog: 1h48m42.663548044s
Simplifying prog options: 11m23.429325715s
Extracting C: 1m11.7425297s
Simplifying C: 0s


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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program crashed: BUG: soft lockup in smp_call_function
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
read(0xffffffffffffffff, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r0, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
write(0xffffffffffffffff, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r0, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

VM was preempted during syz execution: failed to run command in VM: instance is preempted, retrying
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', 0x0, 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

VM was preempted during syz execution: failed to run command in VM: instance is preempted, retrying
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(0x0, 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', 0x0, 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, 0x0, 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, 0x0, 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
program crashed: KASAN: use-after-free Read in ring_buffer_peek
a never seen crash title: KASAN: use-after-free Read in ring_buffer_peek, ignore
simplifying guilty program options
testing 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program did not crash
testing program (duration=6m0s, {Threaded:true 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program crashed: UBSAN: array-index-out-of-bounds in dup_fd
a never seen crash title: UBSAN: array-index-out-of-bounds in dup_fd, ignore
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program did not crash
validation run: crashed=false
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program did not crash
validation run: crashed=false
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program crashed: UBSAN: array-index-out-of-bounds in vm_area_dup
validation run: crashed=true
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program crashed: lost connection to test machine
ignore low priority crash: lost connection to test machine
validation run: crashed=false
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program crashed: UBSAN: array-index-out-of-bounds in unfreeze_partials
validation run: crashed=true
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdir-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdir(&(0x7f0000000000)='dir0\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='dir0\x00', &(0x7f0000000100)='tracefs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='dir0/per_cpu/cpu0/trace_pipe\x00', 0x0, 0x0)
read(r1, &(0x7f0000000b00), 0x64)

program crashed: BUG: soft lockup in smp_call_function
validation run: crashed=true
reproducing took 2h28m31.076519029s
repro crashed as (corrupted=false):
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [kworker/u4:5:439]
Modules linked in:
CPU: 1 PID: 439 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x209/0x490 kernel/smp.c:517
Code: 48 44 89 f6 83 e6 01 31 ff e8 63 90 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 9e 8c 0a 00 e9 a4 00 00 00 f3 90 <f7> 44 24 48 01 00 00 00 0f 84 8f 00 00 00 e8 84 8c 0a 00 eb e9 e8
RSP: 0018:ffffc90002d16740 EFLAGS: 00000293
RAX: ffffffff815a282c RBX: 0000000000000000 RCX: ffff888112fea800
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002d16830 R08: ffff8881f7057647 R09: 1ffff1103ee0aec8
R10: dffffc0000000000 R11: ffffed103ee0aec9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff920005a2cec
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe7ed45ff0 CR3: 00000001087ba000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smp_call_function_many_cond+0x8f5/0x9d0 kernel/smp.c:653
 on_each_cpu_cond_mask+0xb8/0x1c0 kernel/smp.c:904
 native_flush_tlb_others+0x15e/0x230 arch/x86/mm/tlb.c:822
 __flush_tlb_others arch/x86/include/asm/paravirt.h:74 [inline]
 flush_tlb_others arch/x86/mm/tlb.c:829 [inline]
 flush_tlb_mm_range+0x214/0x2c0 arch/x86/mm/tlb.c:916
 flush_tlb_page arch/x86/include/asm/tlbflush.h:235 [inline]
 ptep_clear_flush+0x111/0x150 mm/pgtable-generic.c:97
 page_mkclean_one+0x3b5/0x650 mm/rmap.c:949
 rmap_walk_file+0x523/0x7f0 mm/rmap.c:1995
 rmap_walk mm/rmap.c:2013 [inline]
 page_mkclean+0x202/0x2b0 mm/rmap.c:1017
 clear_page_dirty_for_io+0x23a/0x6c0 mm/page-writeback.c:2726
 mpage_submit_page+0x8e/0x240 fs/ext4/inode.c:2139
 mpage_process_page_bufs+0x6b2/0x7f0 fs/ext4/inode.c:2273
 mpage_prepare_extent_to_map+0x9be/0xcb0 fs/ext4/inode.c:2701
 ext4_writepages+0xa34/0x2f00 fs/ext4/inode.c:2829
 do_writepages+0x12e/0x280 mm/page-writeback.c:2380
 __writeback_single_inode+0xd9/0xa30 fs/fs-writeback.c:1486
 writeback_sb_inodes+0x96d/0x1680 fs/fs-writeback.c:1749
 __writeback_inodes_wb fs/fs-writeback.c:1820 [inline]
 wb_writeback+0x4be/0xb80 fs/fs-writeback.c:1926
 wb_check_background_flush fs/fs-writeback.c:1994 [inline]
 wb_do_writeback fs/fs-writeback.c:2082 [inline]
 wb_workfn+0xb0a/0xf30 fs/fs-writeback.c:2110
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1037 Comm: syz.5.321 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:66 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:112 [inline]
RIP: 0010:kvm_wait+0xbe/0x130 arch/x86/kernel/kvm.c:921
Code: c1 e8 03 42 0f b6 04 30 84 c0 75 6d 0f b6 07 40 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 73 1d b8 03 f4 <eb> 0e 0f 1f 44 00 00 0f 00 2d 64 1d b8 03 fb f4 4c 89 64 24 18 ff
RSP: 0018:ffffc90000dd7520 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff88810006c000 RCX: ffffffff814beb04
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810006c000
RBP: ffffc90000dd75d0 R08: ffff88810006c000 R09: 1ffff1102000d800
R10: dffffc0000000000 R11: ffffed102000d801 R12: 0000000000000046
R13: 4ffd36343a724000 R14: dffffc0000000000 R15: 1ffff920001baea8
FS:  00007fc408e1c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33e63fff CR3: 00000001217c5000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x72d/0xb80 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:184 [inline]
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0xe4/0xf0 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:355 [inline]
 unfreeze_partials+0x76/0x180 mm/slub.c:2379
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 kmem_cache_zalloc include/linux/slab.h:657 [inline]
 alloc_vfsmnt+0x27/0x480 fs/namespace.c:186
 vfs_create_mount+0x7a/0x3c0 fs/namespace.c:961
 do_new_mount_fc fs/namespace.c:2937 [inline]
 do_new_mount+0x34d/0xa30 fs/namespace.c:3008
 path_mount+0x581/0xca0 fs/namespace.c:3336
 do_mount fs/namespace.c:3349 [inline]
 __do_sys_mount fs/namespace.c:3557 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3534
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3534
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fc408fbb159
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:00007fc408e1c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc409242fa0 RCX: 00007fc408fbb159
RDX: 0000200000000040 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007fc40905206b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc409243038 R14: 00007fc409242fa0 R15: 00007ffe02738a58

final repro crashed as (corrupted=false):
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [kworker/u4:5:439]
Modules linked in:
CPU: 1 PID: 439 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x209/0x490 kernel/smp.c:517
Code: 48 44 89 f6 83 e6 01 31 ff e8 63 90 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 9e 8c 0a 00 e9 a4 00 00 00 f3 90 <f7> 44 24 48 01 00 00 00 0f 84 8f 00 00 00 e8 84 8c 0a 00 eb e9 e8
RSP: 0018:ffffc90002d16740 EFLAGS: 00000293
RAX: ffffffff815a282c RBX: 0000000000000000 RCX: ffff888112fea800
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002d16830 R08: ffff8881f7057647 R09: 1ffff1103ee0aec8
R10: dffffc0000000000 R11: ffffed103ee0aec9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff920005a2cec
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe7ed45ff0 CR3: 00000001087ba000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smp_call_function_many_cond+0x8f5/0x9d0 kernel/smp.c:653
 on_each_cpu_cond_mask+0xb8/0x1c0 kernel/smp.c:904
 native_flush_tlb_others+0x15e/0x230 arch/x86/mm/tlb.c:822
 __flush_tlb_others arch/x86/include/asm/paravirt.h:74 [inline]
 flush_tlb_others arch/x86/mm/tlb.c:829 [inline]
 flush_tlb_mm_range+0x214/0x2c0 arch/x86/mm/tlb.c:916
 flush_tlb_page arch/x86/include/asm/tlbflush.h:235 [inline]
 ptep_clear_flush+0x111/0x150 mm/pgtable-generic.c:97
 page_mkclean_one+0x3b5/0x650 mm/rmap.c:949
 rmap_walk_file+0x523/0x7f0 mm/rmap.c:1995
 rmap_walk mm/rmap.c:2013 [inline]
 page_mkclean+0x202/0x2b0 mm/rmap.c:1017
 clear_page_dirty_for_io+0x23a/0x6c0 mm/page-writeback.c:2726
 mpage_submit_page+0x8e/0x240 fs/ext4/inode.c:2139
 mpage_process_page_bufs+0x6b2/0x7f0 fs/ext4/inode.c:2273
 mpage_prepare_extent_to_map+0x9be/0xcb0 fs/ext4/inode.c:2701
 ext4_writepages+0xa34/0x2f00 fs/ext4/inode.c:2829
 do_writepages+0x12e/0x280 mm/page-writeback.c:2380
 __writeback_single_inode+0xd9/0xa30 fs/fs-writeback.c:1486
 writeback_sb_inodes+0x96d/0x1680 fs/fs-writeback.c:1749
 __writeback_inodes_wb fs/fs-writeback.c:1820 [inline]
 wb_writeback+0x4be/0xb80 fs/fs-writeback.c:1926
 wb_check_background_flush fs/fs-writeback.c:1994 [inline]
 wb_do_writeback fs/fs-writeback.c:2082 [inline]
 wb_workfn+0xb0a/0xf30 fs/fs-writeback.c:2110
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1037 Comm: syz.5.321 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:66 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:112 [inline]
RIP: 0010:kvm_wait+0xbe/0x130 arch/x86/kernel/kvm.c:921
Code: c1 e8 03 42 0f b6 04 30 84 c0 75 6d 0f b6 07 40 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 73 1d b8 03 f4 <eb> 0e 0f 1f 44 00 00 0f 00 2d 64 1d b8 03 fb f4 4c 89 64 24 18 ff
RSP: 0018:ffffc90000dd7520 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff88810006c000 RCX: ffffffff814beb04
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810006c000
RBP: ffffc90000dd75d0 R08: ffff88810006c000 R09: 1ffff1102000d800
R10: dffffc0000000000 R11: ffffed102000d801 R12: 0000000000000046
R13: 4ffd36343a724000 R14: dffffc0000000000 R15: 1ffff920001baea8
FS:  00007fc408e1c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33e63fff CR3: 00000001217c5000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x72d/0xb80 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:184 [inline]
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0xe4/0xf0 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:355 [inline]
 unfreeze_partials+0x76/0x180 mm/slub.c:2379
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 kmem_cache_zalloc include/linux/slab.h:657 [inline]
 alloc_vfsmnt+0x27/0x480 fs/namespace.c:186
 vfs_create_mount+0x7a/0x3c0 fs/namespace.c:961
 do_new_mount_fc fs/namespace.c:2937 [inline]
 do_new_mount+0x34d/0xa30 fs/namespace.c:3008
 path_mount+0x581/0xca0 fs/namespace.c:3336
 do_mount fs/namespace.c:3349 [inline]
 __do_sys_mount fs/namespace.c:3557 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3534
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3534
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fc408fbb159
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:00007fc408e1c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc409242fa0 RCX: 00007fc408fbb159
RDX: 0000200000000040 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007fc40905206b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc409243038 R14: 00007fc409242fa0 R15: 00007ffe02738a58