Extracting prog: 3m18.577028641s
Minimizing prog: 55m30.84904024s
Simplifying prog options: 0s
Extracting C: 2m42.700896639s
Simplifying C: 19m35.462628324s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program crashed: INFO: task hung in do_coredump
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
gettid()

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
tkill(0x0, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0), 0x0)
socket$nl_netfilter(0x10, 0x3, 0xc)
r0 = gettid()
tkill(r0, 0x4)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}})
r1 = gettid()
tkill(r1, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r0}})
r1 = gettid()
tkill(r1, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(0x0, 0x0)
r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r0}})
r1 = gettid()
tkill(r1, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, 0x0, &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', 0x0, 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program did not crash
testing program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0), 0x0)
socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, 0x0)
r0 = gettid()
tkill(r0, 0x4)

program did not crash
extracting C reproducer
testing compiled C program (duration=5m25.45793183s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
program crashed: INFO: task hung in do_coredump
simplifying C reproducer
testing compiled C program (duration=5m25.45793183s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=5m25.45793183s, {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-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
program crashed: INFO: task hung in do_coredump
testing compiled C program (duration=5m25.45793183s, {Threaded:true 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}}): mkdirat-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
program crashed: INFO: task hung in do_coredump
testing compiled C program (duration=5m25.45793183s, {Threaded:true 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}}): mkdirat-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
program did not crash
testing compiled C program (duration=5m25.45793183s, {Threaded:true 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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
program crashed: INFO: task hung in do_coredump
testing compiled C program (duration=5m25.45793183s, {Threaded:true 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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
program crashed: INFO: task hung in do_coredump
testing program (duration=5m25.45793183s, {Threaded:true 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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program crashed: INFO: task hung in do_coredump
validation run: crashed=true
testing program (duration=5m25.45793183s, {Threaded:true 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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program crashed: INFO: task hung in do_coredump
validation run: crashed=true
testing program (duration=5m25.45793183s, {Threaded:true 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:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-pipe2$9p-socket$nl_netfilter-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x1c0)
pipe2$9p(&(0x7f00000001c0)={<r0=>0xffffffffffffffff}, 0x0)
r1 = socket$nl_netfilter(0x10, 0x3, 0xc)
mount$9p_fd(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000100), 0x10000, &(0x7f0000000080)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})
r2 = gettid()
tkill(r2, 0x4)

program crashed: INFO: task hung in do_coredump
validation run: crashed=true
reproducing took 1h29m16.227363859s
repro crashed as (corrupted=false):
INFO: task syz.2.17:384 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17        state:D stack:0     pid:384   tgid:382   ppid:377    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6068 [inline]
 __schedule+0x16fe/0x23d0 kernel/sched/core.c:7888
 __schedule_loop kernel/sched/core.c:7965 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7980
 schedule_timeout+0xc7/0x3b0 kernel/time/timer.c:2596
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x368/0x650 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:448 [inline]
 do_coredump+0x885/0x3050 fs/coredump.c:629
 get_signal+0x11bf/0x1490 kernel/signal.c:2926
 arch_do_signal_or_restart+0xbc/0x700 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x57/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f053fb9f559
RSP: 002b:00007f05409dc028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8
RAX: 0000000000000000 RBX: 00007f053fe26090 RCX: 00007f053fb9f559
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f053fc36b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f053fe26128 R14: 00007f053fe26090 R15: 00007ffcdc489ef8
 </TASK>
INFO: task syz.3.18:393 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.18        state:D stack:0     pid:393   tgid:391   ppid:387    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6068 [inline]
 __schedule+0x16fe/0x23d0 kernel/sched/core.c:7888
 __schedule_loop kernel/sched/core.c:7965 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7980
 schedule_timeout+0xc7/0x3b0 kernel/time/timer.c:2596
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x368/0x650 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:448 [inline]
 do_coredump+0x885/0x3050 fs/coredump.c:629
 get_signal+0x11bf/0x1490 kernel/signal.c:2926
 arch_do_signal_or_restart+0xbc/0x700 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x57/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f729619f559
RSP: 002b:00007f7297054028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8
RAX: 0000000000000000 RBX: 00007f7296426090 RCX: 00007f729619f559
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f7296236b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7296426128 R14: 00007f7296426090 R15: 00007ffeb46c0ff8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0cb2410fb94091bea71dcb32925679d580a9884e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:114
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:63
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 cpumask_backtrace+0x1f/0x30 lib/nmi_backtrace.c:127
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xe45/0xf90 kernel/hung_task.c:423
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 0cb2410fb94091bea71dcb32925679d580a9884e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:116
Code: cc cc cc cc cc cc cc b8 94 e0 73 22 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 83 f9 3e 00 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6d00000 RBX: ffff8881036693c0 RCX: ffffffff85a8653d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000044984
RBP: ffffc900001a7e00 R08: ffff8881f6d396fb R09: 1ffff1103eda72df
R10: dffffc0000000000 R11: ffffed103eda72e0 R12: 0000000000000000
R13: 1ffff110206cd278 R14: dffffc0000000000 R15: ffffffff886da4e8
FS:  0000000000000000(0000) GS:ffff8881f6d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f743ad9bd58 CR3: 000000010bb8e000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:-1 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:754
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
 default_idle_call+0x3e/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:193 [inline]
 do_idle+0x1df/0x570 kernel/sched/idle.c:346
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:445
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>

final repro crashed as (corrupted=false):
INFO: task syz.2.17:384 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17        state:D stack:0     pid:384   tgid:382   ppid:377    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6068 [inline]
 __schedule+0x16fe/0x23d0 kernel/sched/core.c:7888
 __schedule_loop kernel/sched/core.c:7965 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7980
 schedule_timeout+0xc7/0x3b0 kernel/time/timer.c:2596
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x368/0x650 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:448 [inline]
 do_coredump+0x885/0x3050 fs/coredump.c:629
 get_signal+0x11bf/0x1490 kernel/signal.c:2926
 arch_do_signal_or_restart+0xbc/0x700 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x57/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f053fb9f559
RSP: 002b:00007f05409dc028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8
RAX: 0000000000000000 RBX: 00007f053fe26090 RCX: 00007f053fb9f559
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f053fc36b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f053fe26128 R14: 00007f053fe26090 R15: 00007ffcdc489ef8
 </TASK>
INFO: task syz.3.18:393 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.18        state:D stack:0     pid:393   tgid:391   ppid:387    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6068 [inline]
 __schedule+0x16fe/0x23d0 kernel/sched/core.c:7888
 __schedule_loop kernel/sched/core.c:7965 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7980
 schedule_timeout+0xc7/0x3b0 kernel/time/timer.c:2596
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x368/0x650 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:448 [inline]
 do_coredump+0x885/0x3050 fs/coredump.c:629
 get_signal+0x11bf/0x1490 kernel/signal.c:2926
 arch_do_signal_or_restart+0xbc/0x700 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x57/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f729619f559
RSP: 002b:00007f7297054028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8
RAX: 0000000000000000 RBX: 00007f7296426090 RCX: 00007f729619f559
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f7296236b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7296426128 R14: 00007f7296426090 R15: 00007ffeb46c0ff8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0cb2410fb94091bea71dcb32925679d580a9884e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:114
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:63
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 cpumask_backtrace+0x1f/0x30 lib/nmi_backtrace.c:127
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xe45/0xf90 kernel/hung_task.c:423
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 0cb2410fb94091bea71dcb32925679d580a9884e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:116
Code: cc cc cc cc cc cc cc b8 94 e0 73 22 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 83 f9 3e 00 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6d00000 RBX: ffff8881036693c0 RCX: ffffffff85a8653d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000044984
RBP: ffffc900001a7e00 R08: ffff8881f6d396fb R09: 1ffff1103eda72df
R10: dffffc0000000000 R11: ffffed103eda72e0 R12: 0000000000000000
R13: 1ffff110206cd278 R14: dffffc0000000000 R15: ffffffff886da4e8
FS:  0000000000000000(0000) GS:ffff8881f6d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f743ad9bd58 CR3: 000000010bb8e000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:-1 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:754
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
 default_idle_call+0x3e/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:193 [inline]
 do_idle+0x1df/0x570 kernel/sched/idle.c:346
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:445
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>