Extracting prog: 5m3.545341037s
Minimizing prog: 1h14m57.950011601s
Simplifying prog options: 0s
Extracting C: 2m42.414778007s
Simplifying C: 18m15.400822289s


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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

program crashed: lost connection to test machine
program crashed: INFO: task hung in do_coredump
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
tkill(r3, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(0x0, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-dup-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
dup(r0)
r1 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r1, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240))
r0 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {}, 0x2c, {[], [], 0x6b}})
r1 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r1, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

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: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}}): socketpair$unix-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r1 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r1}, 0x2c, {[], [], 0x6b}})
r2 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r2, 0x4)

program did not crash
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}}): eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
r0 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r1 = dup(0xffffffffffffffff)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}, 0x2c, {[], [], 0x6b}})
r2 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r2, 0x4)

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: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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid()
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

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: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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, 0x0)
r0 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r1 = dup(0xffffffffffffffff)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}, 0x2c, {[], [], 0x6b}})
r2 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r2, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, 0x0, 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, 0x0, &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', 0x0, 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

program did not crash
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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, 0x0)
r1 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r1, 0x4)

program did not crash
extracting C reproducer
testing compiled C 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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
program crashed: INFO: task hung in do_coredump
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
program crashed: INFO: task hung in do_coredump
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
program crashed: INFO: task hung in do_coredump
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
program did not crash
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
program crashed: INFO: task hung in do_coredump
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
program crashed: INFO: task hung in do_coredump
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

program crashed: INFO: task hung in do_coredump
validation run: crashed=true
testing program (duration=6m0s, {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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

program crashed: INFO: task hung in do_coredump
validation run: crashed=true
testing program (duration=6m0s, {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}}): socketpair$unix-eventfd-mkdirat-dup-mount$9p_fd-gettid-rt_sigtimedwait-tkill
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = eventfd(0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./file0\x00', 0x0)
r2 = dup(r0)
mount$9p_fd(0x0, &(0x7f00000001c0)='./file0\x00', &(0x7f00000002c0), 0x204008, &(0x7f0000000340)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r2}, 0x2c, {[], [], 0x6b}})
r3 = gettid() (async)
rt_sigtimedwait(0x0, 0x0, 0x0, 0x0)
tkill(r3, 0x4)

program crashed: INFO: task hung in do_coredump
validation run: crashed=true
reproducing took 1h49m49.678201285s
repro crashed as (corrupted=false):
INFO: task syz.2.17:372 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:372   tgid:370   ppid:366    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6016 [inline]
 __schedule+0x1399/0x1fa0 kernel/sched/core.c:7870
 __schedule_loop kernel/sched/core.c:7951 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7966
 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+0x369/0x650 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+0x8ad/0x2fe0 fs/coredump.c:629
 get_signal+0x11f8/0x14e0 kernel/signal.c:2918
 arch_do_signal_or_restart+0xbc/0x760 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: 0033:0x7fb6da99c819
RSP: 002b:00007fb6da7de028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8
RAX: 0000000000000000 RBX: 00007fb6dac16090 RCX: 00007fb6da99c819
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007fb6daa32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb6dac16128 R14: 00007fb6dac16090 R15: 00007ffd8de91fc8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 90b12aa1a603b2eff3e7fbc29ad65555fd578c6a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xdad/0xf00 kernel/hung_task.c:423
 kthread+0x2c6/0x370 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 90b12aa1a603b2eff3e7fbc29ad65555fd578c6a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:tick_nohz_idle_stop_tick+0xb9/0xa00 kernel/time/tick-sched.c:1225
Code: 44 00 00 e8 69 7c 0c 00 4d 8d a6 90 00 00 00 4d 89 e5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 e7 e8 3b b2 64 00 49 8b 1c 24 <31> ff 48 89 de e8 1d 81 0c 00 48 85 db 74 27 e8 33 7c 0c 00 49 8d
RSP: 0018:ffffc900001a7d40 EFLAGS: 00000046
RAX: ffffffff817b2e77 RBX: 0000000000000000 RCX: ffff88810366a600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001a7e30 R08: ffffffff87ec16ef R09: 1ffffffff0fd82dd
R10: dffffc0000000000 R11: fffffbfff0fd82de R12: ffff8881f6f2d580
R13: 1ffff1103ede5ab0 R14: ffff8881f6f2d4f0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c67a53ff8 CR3: 000000010c7d8000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 cpuidle_idle_call kernel/sched/idle.c:183 [inline]
 do_idle+0x19a/0x4b0 kernel/sched/idle.c:326
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:424
 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.2.17:372 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:372   tgid:370   ppid:366    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6016 [inline]
 __schedule+0x1399/0x1fa0 kernel/sched/core.c:7870
 __schedule_loop kernel/sched/core.c:7951 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7966
 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+0x369/0x650 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+0x8ad/0x2fe0 fs/coredump.c:629
 get_signal+0x11f8/0x14e0 kernel/signal.c:2918
 arch_do_signal_or_restart+0xbc/0x760 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: 0033:0x7fb6da99c819
RSP: 002b:00007fb6da7de028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8
RAX: 0000000000000000 RBX: 00007fb6dac16090 RCX: 00007fb6da99c819
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007fb6daa32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb6dac16128 R14: 00007fb6dac16090 R15: 00007ffd8de91fc8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 90b12aa1a603b2eff3e7fbc29ad65555fd578c6a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xdad/0xf00 kernel/hung_task.c:423
 kthread+0x2c6/0x370 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 90b12aa1a603b2eff3e7fbc29ad65555fd578c6a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:tick_nohz_idle_stop_tick+0xb9/0xa00 kernel/time/tick-sched.c:1225
Code: 44 00 00 e8 69 7c 0c 00 4d 8d a6 90 00 00 00 4d 89 e5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 e7 e8 3b b2 64 00 49 8b 1c 24 <31> ff 48 89 de e8 1d 81 0c 00 48 85 db 74 27 e8 33 7c 0c 00 49 8d
RSP: 0018:ffffc900001a7d40 EFLAGS: 00000046
RAX: ffffffff817b2e77 RBX: 0000000000000000 RCX: ffff88810366a600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001a7e30 R08: ffffffff87ec16ef R09: 1ffffffff0fd82dd
R10: dffffc0000000000 R11: fffffbfff0fd82de R12: ffff8881f6f2d580
R13: 1ffff1103ede5ab0 R14: ffff8881f6f2d4f0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c67a53ff8 CR3: 000000010c7d8000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 cpuidle_idle_call kernel/sched/idle.c:183 [inline]
 do_idle+0x19a/0x4b0 kernel/sched/idle.c:326
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:424
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>