Extracting prog: 49.080839629s
Minimizing prog: 13m9.270095964s
Simplifying prog options: 0s
Extracting C: 52.941898566s
Simplifying C: 10m59.732396354s


extracting reproducer from 24 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program crashed: divide error in __tcp_select_window
single: successfully extracted reproducer
found reproducer with 7 syscalls
minimizing guilty program
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
shutdown(r0, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(0xffffffffffffffff, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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}}): close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
close(0xffffffffffffffff)
r0 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(0xffffffffffffffff, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r0, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(0xffffffffffffffff, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(0xffffffffffffffff, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, 0x0, 0x0)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, 0x0, 0x0)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program did not crash
testing program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, 0x0, 0x0)
shutdown(r0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.552492949s, {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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
simplifying C reproducer
testing compiled C program (duration=45.552492949s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=45.552492949s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=45.552492949s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=45.552492949s, {Threaded:false Repeat:false 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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=45.552492949s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=45.552492949s, {Threaded:false Repeat:false 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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=45.552492949s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
program crashed: divide error in __tcp_select_window
testing program (duration=45.552492949s, {Threaded:false Repeat:false 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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program crashed: divide error in __tcp_select_window
validation run: crashed=true
testing program (duration=45.552492949s, {Threaded:false Repeat:false 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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program crashed: divide error in __tcp_select_window
validation run: crashed=true
testing program (duration=45.552492949s, {Threaded:false Repeat:false 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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-shutdown
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
shutdown(r0, 0x0)

program crashed: divide error in __tcp_select_window
program crashed: divide error in __tcp_select_window
validation run: crashed=true
reproducing took 32m26.922613628s
repro crashed as (corrupted=false):
divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5919 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__tcp_select_window+0x7a3/0x1270 net/ipv4/tcp_output.c:3114
Code: ff ff ff 44 89 e1 d3 e0 89 c1 f7 d1 41 01 ce 41 21 c6 e9 c5 00 00 00 e8 ab 9e 97 f8 e9 b8 00 00 00 e8 a1 9e 97 f8 44 89 f0 99 <f7> 7c 24 2c 41 29 d6 48 bb 00 00 00 00 00 fc ff df e9 9c 00 00 00
RSP: 0018:ffffc90003957b00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888026d75a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003957bf0 R08: ffff88801e780e93 R09: 1ffff11003cf01d2
R10: dffffc0000000000 R11: ffffed1003cf01d3 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888078a996e8
FS:  000055557ac56500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000180 CR3: 0000000073144000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 tcp_select_window net/ipv4/tcp_output.c:276 [inline]
 __tcp_transmit_skb+0xb40/0x32a0 net/ipv4/tcp_output.c:1368
 tcp_transmit_skb net/ipv4/tcp_output.c:1440 [inline]
 tcp_send_active_reset+0x35e/0x6c0 net/ipv4/tcp_output.c:3593
 mptcp_do_fastclose+0x23a/0x310 net/mptcp/protocol.c:2820
 mptcp_disconnect+0x1fc/0x520 net/mptcp/protocol.c:3282
 inet_shutdown+0x1be/0x370 net/ipv4/af_inet.c:934
 __sys_shutdown_sock net/socket.c:2436 [inline]
 __sys_shutdown net/socket.c:2448 [inline]
 __do_sys_shutdown net/socket.c:2456 [inline]
 __se_sys_shutdown net/socket.c:2454 [inline]
 __x64_sys_shutdown+0x174/0x1d0 net/socket.c:2454
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1872f8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc6d7f6508 EFLAGS: 00000246 ORIG_RAX: 0000000000000030
RAX: ffffffffffffffda RBX: 00007f18731e5fa0 RCX: 00007f1872f8f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f1873013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f18731e5fa0 R14: 00007f18731e5fa0 R15: 0000000000000002
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__tcp_select_window+0x7a3/0x1270 net/ipv4/tcp_output.c:3114
Code: ff ff ff 44 89 e1 d3 e0 89 c1 f7 d1 41 01 ce 41 21 c6 e9 c5 00 00 00 e8 ab 9e 97 f8 e9 b8 00 00 00 e8 a1 9e 97 f8 44 89 f0 99 <f7> 7c 24 2c 41 29 d6 48 bb 00 00 00 00 00 fc ff df e9 9c 00 00 00
RSP: 0018:ffffc90003957b00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888026d75a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003957bf0 R08: ffff88801e780e93 R09: 1ffff11003cf01d2
R10: dffffc0000000000 R11: ffffed1003cf01d3 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888078a996e8
FS:  000055557ac56500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000180 CR3: 0000000073144000 CR4: 00000000003506e0
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 44 89 e1          	incl   -0x1f(%rcx,%rcx,4)
   4:	d3 e0                	shl    %cl,%eax
   6:	89 c1                	mov    %eax,%ecx
   8:	f7 d1                	not    %ecx
   a:	41 01 ce             	add    %ecx,%r14d
   d:	41 21 c6             	and    %eax,%r14d
  10:	e9 c5 00 00 00       	jmp    0xda
  15:	e8 ab 9e 97 f8       	call   0xf8979ec5
  1a:	e9 b8 00 00 00       	jmp    0xd7
  1f:	e8 a1 9e 97 f8       	call   0xf8979ec5
  24:	44 89 f0             	mov    %r14d,%eax
  27:	99                   	cltd
* 28:	f7 7c 24 2c          	idivl  0x2c(%rsp) <-- trapping instruction
  2c:	41 29 d6             	sub    %edx,%r14d
  2f:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  36:	fc ff df
  39:	e9 9c 00 00 00       	jmp    0xda

final repro crashed as (corrupted=false):
divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5919 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__tcp_select_window+0x7a3/0x1270 net/ipv4/tcp_output.c:3114
Code: ff ff ff 44 89 e1 d3 e0 89 c1 f7 d1 41 01 ce 41 21 c6 e9 c5 00 00 00 e8 ab 9e 97 f8 e9 b8 00 00 00 e8 a1 9e 97 f8 44 89 f0 99 <f7> 7c 24 2c 41 29 d6 48 bb 00 00 00 00 00 fc ff df e9 9c 00 00 00
RSP: 0018:ffffc90003957b00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888026d75a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003957bf0 R08: ffff88801e780e93 R09: 1ffff11003cf01d2
R10: dffffc0000000000 R11: ffffed1003cf01d3 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888078a996e8
FS:  000055557ac56500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000180 CR3: 0000000073144000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 tcp_select_window net/ipv4/tcp_output.c:276 [inline]
 __tcp_transmit_skb+0xb40/0x32a0 net/ipv4/tcp_output.c:1368
 tcp_transmit_skb net/ipv4/tcp_output.c:1440 [inline]
 tcp_send_active_reset+0x35e/0x6c0 net/ipv4/tcp_output.c:3593
 mptcp_do_fastclose+0x23a/0x310 net/mptcp/protocol.c:2820
 mptcp_disconnect+0x1fc/0x520 net/mptcp/protocol.c:3282
 inet_shutdown+0x1be/0x370 net/ipv4/af_inet.c:934
 __sys_shutdown_sock net/socket.c:2436 [inline]
 __sys_shutdown net/socket.c:2448 [inline]
 __do_sys_shutdown net/socket.c:2456 [inline]
 __se_sys_shutdown net/socket.c:2454 [inline]
 __x64_sys_shutdown+0x174/0x1d0 net/socket.c:2454
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1872f8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc6d7f6508 EFLAGS: 00000246 ORIG_RAX: 0000000000000030
RAX: ffffffffffffffda RBX: 00007f18731e5fa0 RCX: 00007f1872f8f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f1873013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f18731e5fa0 R14: 00007f18731e5fa0 R15: 0000000000000002
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__tcp_select_window+0x7a3/0x1270 net/ipv4/tcp_output.c:3114
Code: ff ff ff 44 89 e1 d3 e0 89 c1 f7 d1 41 01 ce 41 21 c6 e9 c5 00 00 00 e8 ab 9e 97 f8 e9 b8 00 00 00 e8 a1 9e 97 f8 44 89 f0 99 <f7> 7c 24 2c 41 29 d6 48 bb 00 00 00 00 00 fc ff df e9 9c 00 00 00
RSP: 0018:ffffc90003957b00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888026d75a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003957bf0 R08: ffff88801e780e93 R09: 1ffff11003cf01d2
R10: dffffc0000000000 R11: ffffed1003cf01d3 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888078a996e8
FS:  000055557ac56500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000180 CR3: 0000000073144000 CR4: 00000000003506e0
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 44 89 e1          	incl   -0x1f(%rcx,%rcx,4)
   4:	d3 e0                	shl    %cl,%eax
   6:	89 c1                	mov    %eax,%ecx
   8:	f7 d1                	not    %ecx
   a:	41 01 ce             	add    %ecx,%r14d
   d:	41 21 c6             	and    %eax,%r14d
  10:	e9 c5 00 00 00       	jmp    0xda
  15:	e8 ab 9e 97 f8       	call   0xf8979ec5
  1a:	e9 b8 00 00 00       	jmp    0xd7
  1f:	e8 a1 9e 97 f8       	call   0xf8979ec5
  24:	44 89 f0             	mov    %r14d,%eax
  27:	99                   	cltd
* 28:	f7 7c 24 2c          	idivl  0x2c(%rsp) <-- trapping instruction
  2c:	41 29 d6             	sub    %edx,%r14d
  2f:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  36:	fc ff df
  39:	e9 9c 00 00 00       	jmp    0xda