Extracting prog: 1m41.783338703s
Minimizing prog: 5m14.58034928s
Simplifying prog options: 5m10.940536598s
Extracting C: 1m1.446754557s
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}}): mount-openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
mount(0x0, 0x0, 0x0, 0x4000, 0x0)
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: SYZFAIL: posix_spawnp failed
program crashed: SYZFAIL: posix_spawnp failed
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=49.304933863s, {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$binfmt_register
detailed listing:
executing program 0:
mount(0x0, 0x0, 0x0, 0x4000, 0x0)
openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)

program did not crash
testing program (duration=49.304933863s, {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-write$binfmt_register
detailed listing:
executing program 0:
mount(0x0, 0x0, 0x0, 0x4000, 0x0)
write$binfmt_register(0xffffffffffffffff, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program did not crash
testing program (duration=49.304933863s, {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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: SYZFAIL: posix_spawnp failed
testing program (duration=49.304933863s, {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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, 0x0, 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program did not crash
testing program (duration=49.304933863s, {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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=49.304933863s, {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}}): openat$binfmt_register-write$binfmt_register
program did not crash
simplifying guilty program options
testing program (duration=49.304933863s, {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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: SYZFAIL: posix_spawnp failed
extracting C reproducer
testing compiled C program (duration=49.304933863s, {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}}): openat$binfmt_register-write$binfmt_register
program did not crash
testing program (duration=49.304933863s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false 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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: lost connection to test machine
a never seen crash title: lost connection to test machine, ignore
testing program (duration=49.304933863s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: SYZFAIL: posix_spawnp failed
extracting C reproducer
testing compiled C program (duration=49.304933863s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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}}): openat$binfmt_register-write$binfmt_register
program did not crash
testing program (duration=49.304933863s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: SYZFAIL: posix_spawnp failed
validation run: crashed=true
testing program (duration=49.304933863s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: SYZFAIL: posix_spawnp failed
validation run: crashed=true
testing program (duration=49.304933863s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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}}): openat$binfmt_register-write$binfmt_register
detailed listing:
executing program 0:
r0 = openat$binfmt_register(0xffffffffffffff9c, &(0x7f00000000c0), 0x1, 0x0)
write$binfmt_register(r0, &(0x7f0000000200)={0x3a, 'syz3', 0x3a, 'M', 0x3a, 0x6, 0x3a, '\x80', 0x3a, '\\', 0x3a, './file0', 0x3a, [0x4f]}, 0x2a)

program crashed: SYZFAIL: posix_spawnp failed
validation run: crashed=true
reproducing took 15m59.159412933s
repro crashed as (corrupted=false):
2026/02/04 01:06:33 executed programs: 276
2026/02/04 01:06:38 executed programs: 573
SYZFAIL: posix_spawnp failed
 (errno 2: No such file or directory)
connection error: failed to recv *flatrpc.ExecutorMessageRawT: read tcp 127.0.0.1:37367->127.0.0.1:43084: read: connection reset by peer

final repro crashed as (corrupted=false):
2026/02/04 01:06:33 executed programs: 276
2026/02/04 01:06:38 executed programs: 573
SYZFAIL: posix_spawnp failed
 (errno 2: No such file or directory)
connection error: failed to recv *flatrpc.ExecutorMessageRawT: read tcp 127.0.0.1:37367->127.0.0.1:43084: read: connection reset by peer