Extracting prog: 1m57.906175879s
Minimizing prog: 18m49.105169854s
Simplifying prog options: 0s
Extracting C: 1m23.064455754s
Simplifying C: 7m6.477683453s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
setsockopt(0xffffffffffffffff, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(0xffffffffffffffff, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(0xffffffffffffffff, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(0xffffffffffffffff, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
bind$inet6(0xffffffffffffffff, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(0xffffffffffffffff, 0x101)
r0 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r0, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r0, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r0, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r0, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, 0x0, 0x0)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, 0x0, 0x0)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff), 0x0)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, 0x0, 0x0)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, 0x0, 0x0) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, 0x0, 0x0, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780), 0x0, 0x0, 0x0, 0x0) (rerun: 64)

program did not crash
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
testing compiled C program (duration=30s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6-bind$inet6-listen-socket$inet_dccp-setsockopt-connect$inet-write$binfmt_script-sendto$inet
detailed listing:
executing program 0:
r0 = socket$inet6(0xa, 0x6, 0x0)
bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c)
listen(r0, 0x101)
r1 = socket$inet_dccp(0x2, 0x6, 0x0)
setsockopt(r1, 0x10d, 0x800000000d, &(0x7f00001c9fff)="03", 0x1)
connect$inet(r1, &(0x7f0000000080)={0x2, 0x4e20, @loopback}, 0x10)
write$binfmt_script(r1, &(0x7f00000000c0)={'#! ', './file0'}, 0xb) (rerun: 64)
sendto$inet(r1, &(0x7f0000000780)='+', 0x1, 0x0, 0x0, 0x0) (rerun: 64)

program crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval()
validation run: crashed=true
reproducing took 32m46.063452404s
repro crashed as (corrupted=false):
BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval()
CPU: 0 PID: 4458 Comm: syz.0.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 ccid3_update_send_interval net/dccp/ccids/ccid3.c:90 [inline]
 ccid3_hc_tx_update_s net/dccp/ccids/ccid3.c:169 [inline]
 ccid3_hc_tx_packet_sent+0x240/0x2c4 net/dccp/ccids/ccid3.c:353
 ccid_hc_tx_packet_sent net/dccp/ccid.h:175 [inline]
 dccp_xmit_packet+0x298/0x460 net/dccp/output.c:289
 dccp_write_xmit+0x118/0x1d0 net/dccp/output.c:366
 dccp_sendmsg+0x53c/0x8f4 net/dccp/proto.c:798
 inet_sendmsg+0x154/0x27c net/ipv4/af_inet.c:841
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x324/0x440 net/socket.c:2153
 __do_sys_sendto net/socket.c:2165 [inline]
 __se_sys_sendto net/socket.c:2161 [inline]
 __arm64_sys_sendto+0xe4/0x104 net/socket.c:2161
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

final repro crashed as (corrupted=false):
BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval()
CPU: 0 PID: 4458 Comm: syz.0.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 ccid3_update_send_interval net/dccp/ccids/ccid3.c:90 [inline]
 ccid3_hc_tx_update_s net/dccp/ccids/ccid3.c:169 [inline]
 ccid3_hc_tx_packet_sent+0x240/0x2c4 net/dccp/ccids/ccid3.c:353
 ccid_hc_tx_packet_sent net/dccp/ccid.h:175 [inline]
 dccp_xmit_packet+0x298/0x460 net/dccp/output.c:289
 dccp_write_xmit+0x118/0x1d0 net/dccp/output.c:366
 dccp_sendmsg+0x53c/0x8f4 net/dccp/proto.c:798
 inet_sendmsg+0x154/0x27c net/ipv4/af_inet.c:841
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x324/0x440 net/socket.c:2153
 __do_sys_sendto net/socket.c:2165 [inline]
 __se_sys_sendto net/socket.c:2161 [inline]
 __arm64_sys_sendto+0xe4/0x104 net/socket.c:2161
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585