Extracting prog: 39.084095925s
Minimizing prog: 18m35.078974086s
Simplifying prog options: 0s
Extracting C: 44.775388392s
Simplifying C: 10m27.677864661s


extracting reproducer from 30 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: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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$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$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program crashed: divide error in __tcp_select_window
single: successfully extracted reproducer
found reproducer with 7 syscalls
minimizing guilty program
testing program (duration=46.365233632s, {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$inet6_tcp-close-socket$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=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-sendto$inet6
detailed listing:
executing program 0:
r0 = socket$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$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, &(0x7f0000000180)=0x400000001, 0xc2)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-close-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
detailed listing:
executing program 0:
r0 = socket$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$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
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$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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}}): close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
detailed listing:
executing program 0:
close(0xffffffffffffffff)
r0 = socket$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$inet6(0xffffffffffffffff, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$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$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
detailed listing:
executing program 0:
r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
close(r0)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
setsockopt$inet6_tcp_int(r0, 0x6, 0x1e, 0x0, 0x0)
setsockopt$inet6_tcp_int(r1, 0x6, 0x2000000000000022, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$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, 0x0, 0x0)
connect$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
testing program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$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$inet6(r0, 0x0, 0x0)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program did not crash
extracting C reproducer
testing compiled C program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
simplifying C reproducer
testing compiled C program (duration=46.365233632s, {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$inet6_tcp-close-socket$inet6_mptcp-setsockopt$inet6_tcp_int-setsockopt$inet6_tcp_int-connect$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=46.365233632s, {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$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=46.365233632s, {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$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=46.365233632s, {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$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=46.365233632s, {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$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=46.365233632s, {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$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
testing compiled C program (duration=46.365233632s, {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$inet6-sendto$inet6
program crashed: divide error in __tcp_select_window
testing program (duration=46.365233632s, {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$inet6-sendto$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$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program crashed: divide error in __tcp_select_window
validation run: crashed=true
testing program (duration=46.365233632s, {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$inet6-sendto$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$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program crashed: divide error in __tcp_select_window
validation run: crashed=true
testing program (duration=46.365233632s, {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$inet6-sendto$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$inet6(r0, &(0x7f0000000240)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @local}, 0x2000000b}, 0x1c)
sendto$inet6(r0, 0x0, 0x0, 0x0, 0x0, 0x0) (fail_nth: 1)

program crashed: divide error in __tcp_select_window
validation run: crashed=true
reproducing took 34m47.227384357s
repro crashed as (corrupted=false):
RBP: 00007ffff9acee10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f66e9be5fa0 R14: 00007f66e9be5fa0 R15: 0000000000000006
 </TASK>
Oops: divide error: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6068 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__tcp_select_window+0x824/0x1320 net/ipv4/tcp_output.c:3336
Code: ff ff ff 44 89 f1 d3 e0 89 c1 f7 d1 41 01 cc 41 21 c4 e9 a9 00 00 00 e8 ca 49 01 f8 e9 9c 00 00 00 e8 c0 49 01 f8 44 89 e0 99 <f7> 7c 24 1c 41 29 d4 48 bb 00 00 00 00 00 fc ff df e9 80 00 00 00
RSP: 0018:ffffc90003017640 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807b469e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003017730 R08: ffff888033268143 R09: 1ffff1100664d028
R10: dffffc0000000000 R11: ffffed100664d029 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055557faa0500(0000) GS:ffff888126135000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64a1912ff8 CR3: 0000000072122000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 tcp_select_window net/ipv4/tcp_output.c:281 [inline]
 __tcp_transmit_skb+0xbc7/0x3aa0 net/ipv4/tcp_output.c:1568
 tcp_transmit_skb net/ipv4/tcp_output.c:1649 [inline]
 tcp_send_active_reset+0x2d1/0x5b0 net/ipv4/tcp_output.c:3836
 mptcp_do_fastclose+0x27e/0x380 net/mptcp/protocol.c:2793
 mptcp_disconnect+0x238/0x710 net/mptcp/protocol.c:3253
 mptcp_sendmsg_fastopen+0x2f8/0x580 net/mptcp/protocol.c:1776
 mptcp_sendmsg+0x1774/0x1980 net/mptcp/protocol.c:1855
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0xe5/0x270 net/socket.c:742
 __sys_sendto+0x3bd/0x520 net/socket.c:2244
 __do_sys_sendto net/socket.c:2251 [inline]
 __se_sys_sendto net/socket.c:2247 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2247
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f66e998f749
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:00007ffff9acedb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f66e9be5fa0 RCX: 00007f66e998f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ffff9acee10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f66e9be5fa0 R14: 00007f66e9be5fa0 R15: 0000000000000006
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__tcp_select_window+0x824/0x1320 net/ipv4/tcp_output.c:3336
Code: ff ff ff 44 89 f1 d3 e0 89 c1 f7 d1 41 01 cc 41 21 c4 e9 a9 00 00 00 e8 ca 49 01 f8 e9 9c 00 00 00 e8 c0 49 01 f8 44 89 e0 99 <f7> 7c 24 1c 41 29 d4 48 bb 00 00 00 00 00 fc ff df e9 80 00 00 00
RSP: 0018:ffffc90003017640 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807b469e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003017730 R08: ffff888033268143 R09: 1ffff1100664d028
R10: dffffc0000000000 R11: ffffed100664d029 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055557faa0500(0000) GS:ffff888126135000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64a1912ff8 CR3: 0000000072122000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 44 89 f1          	incl   -0xf(%rcx,%rcx,4)
   4:	d3 e0                	shl    %cl,%eax
   6:	89 c1                	mov    %eax,%ecx
   8:	f7 d1                	not    %ecx
   a:	41 01 cc             	add    %ecx,%r12d
   d:	41 21 c4             	and    %eax,%r12d
  10:	e9 a9 00 00 00       	jmp    0xbe
  15:	e8 ca 49 01 f8       	call   0xf80149e4
  1a:	e9 9c 00 00 00       	jmp    0xbb
  1f:	e8 c0 49 01 f8       	call   0xf80149e4
  24:	44 89 e0             	mov    %r12d,%eax
  27:	99                   	cltd
* 28:	f7 7c 24 1c          	idivl  0x1c(%rsp) <-- trapping instruction
  2c:	41 29 d4             	sub    %edx,%r12d
  2f:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  36:	fc ff df
  39:	e9 80 00 00 00       	jmp    0xbe

final repro crashed as (corrupted=false):
RBP: 00007ffff9acee10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f66e9be5fa0 R14: 00007f66e9be5fa0 R15: 0000000000000006
 </TASK>
Oops: divide error: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6068 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__tcp_select_window+0x824/0x1320 net/ipv4/tcp_output.c:3336
Code: ff ff ff 44 89 f1 d3 e0 89 c1 f7 d1 41 01 cc 41 21 c4 e9 a9 00 00 00 e8 ca 49 01 f8 e9 9c 00 00 00 e8 c0 49 01 f8 44 89 e0 99 <f7> 7c 24 1c 41 29 d4 48 bb 00 00 00 00 00 fc ff df e9 80 00 00 00
RSP: 0018:ffffc90003017640 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807b469e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003017730 R08: ffff888033268143 R09: 1ffff1100664d028
R10: dffffc0000000000 R11: ffffed100664d029 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055557faa0500(0000) GS:ffff888126135000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64a1912ff8 CR3: 0000000072122000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 tcp_select_window net/ipv4/tcp_output.c:281 [inline]
 __tcp_transmit_skb+0xbc7/0x3aa0 net/ipv4/tcp_output.c:1568
 tcp_transmit_skb net/ipv4/tcp_output.c:1649 [inline]
 tcp_send_active_reset+0x2d1/0x5b0 net/ipv4/tcp_output.c:3836
 mptcp_do_fastclose+0x27e/0x380 net/mptcp/protocol.c:2793
 mptcp_disconnect+0x238/0x710 net/mptcp/protocol.c:3253
 mptcp_sendmsg_fastopen+0x2f8/0x580 net/mptcp/protocol.c:1776
 mptcp_sendmsg+0x1774/0x1980 net/mptcp/protocol.c:1855
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0xe5/0x270 net/socket.c:742
 __sys_sendto+0x3bd/0x520 net/socket.c:2244
 __do_sys_sendto net/socket.c:2251 [inline]
 __se_sys_sendto net/socket.c:2247 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2247
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f66e998f749
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:00007ffff9acedb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f66e9be5fa0 RCX: 00007f66e998f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ffff9acee10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f66e9be5fa0 R14: 00007f66e9be5fa0 R15: 0000000000000006
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__tcp_select_window+0x824/0x1320 net/ipv4/tcp_output.c:3336
Code: ff ff ff 44 89 f1 d3 e0 89 c1 f7 d1 41 01 cc 41 21 c4 e9 a9 00 00 00 e8 ca 49 01 f8 e9 9c 00 00 00 e8 c0 49 01 f8 44 89 e0 99 <f7> 7c 24 1c 41 29 d4 48 bb 00 00 00 00 00 fc ff df e9 80 00 00 00
RSP: 0018:ffffc90003017640 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807b469e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003017730 R08: ffff888033268143 R09: 1ffff1100664d028
R10: dffffc0000000000 R11: ffffed100664d029 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  000055557faa0500(0000) GS:ffff888126135000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64a1912ff8 CR3: 0000000072122000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 44 89 f1          	incl   -0xf(%rcx,%rcx,4)
   4:	d3 e0                	shl    %cl,%eax
   6:	89 c1                	mov    %eax,%ecx
   8:	f7 d1                	not    %ecx
   a:	41 01 cc             	add    %ecx,%r12d
   d:	41 21 c4             	and    %eax,%r12d
  10:	e9 a9 00 00 00       	jmp    0xbe
  15:	e8 ca 49 01 f8       	call   0xf80149e4
  1a:	e9 9c 00 00 00       	jmp    0xbb
  1f:	e8 c0 49 01 f8       	call   0xf80149e4
  24:	44 89 e0             	mov    %r12d,%eax
  27:	99                   	cltd
* 28:	f7 7c 24 1c          	idivl  0x1c(%rsp) <-- trapping instruction
  2c:	41 29 d4             	sub    %edx,%r12d
  2f:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  36:	fc ff df
  39:	e9 80 00 00 00       	jmp    0xbe