Extracting prog: 1m36.402472774s
Minimizing prog: 23m0.198106674s
Simplifying prog options: 3m45.276244684s
Extracting C: 1m46.961735191s
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: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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program crashed: WARNING in ip6mr_free_table
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
r0 = socket(0x1, 0x803, 0x0)
getsockname$packet(r0, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
socket(0x1, 0x803, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
getsockname$packet(0xffffffffffffffff, &(0x7f0000000100)={0x11, 0x0, <r1=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r1], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket(0x1, 0x803, 0x0)
getsockname$packet(r0, &(0x7f0000000100)={0x11, 0x0, <r1=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r1], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, 0x0, &(0x7f00000002c0))
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={0x0, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB, @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
program did not crash
simplifying guilty program options
testing program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-socket$nl_route-socket-getsockname$packet-sendmsg$nl_route
detailed listing:
executing program 0:
syz_open_procfs(0x0, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket(0x1, 0x803, 0x0)
getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, <r2=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f00000002c0)=0x14)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x4a, &(0x7f00000000c0)={&(0x7f0000000300)=ANY=[@ANYBLOB="400000001000010400"/20, @ANYRES32=0x0, @ANYBLOB="0000000000000000180012800e0001007769726567756172640000000400028008000300", @ANYRES32=r2], 0x40}, 0x1, 0xd}, 0x0)

program did not crash
reproducing took 30m8.838579224s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5977 at net/ipv6/ip6mr.c:419 ip6mr_free_table+0xbd/0x120 net/ipv6/ip6mr.c:419
Modules linked in:
CPU: 1 UID: 0 PID: 5977 Comm: syz-executor Not tainted 6.13.0-rc1-syzkaller-00005-gceb8bf2ceaa7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ip6mr_free_table+0xbd/0x120 net/ipv6/ip6mr.c:419
Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 58 49 83 bc 24 c0 0e 00 00 00 74 09 e8 c4 c5 af f7 90 <0f> 0b 90 e8 bb c5 af f7 48 8d 7b 38 e8 22 86 9c f7 48 89 df be 0f
RSP: 0018:ffffc90003dd7bd8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880507fc000 RCX: ffffffff89ea4014
RDX: ffff8880297c2440 RSI: ffffffff89ea404c RDI: ffff888028a62d00
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: ffff888028a61e40
R13: ffff8880507fc000 R14: ffff8880507fc008 R15: dead000000000100
FS:  0000555566417500(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd00678048 CR3: 0000000030f1a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ip6mr_rules_exit+0x176/0x2d0 net/ipv6/ip6mr.c:283
 ip6mr_net_exit_batch+0x53/0xa0 net/ipv6/ip6mr.c:1388
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:177
 setup_net+0x4fe/0x860 net/core/net_namespace.c:394
 copy_net_ns+0x2b4/0x6b0 net/core/net_namespace.c:500
 create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x45d/0xa40 kernel/fork.c:3334
 __do_sys_unshare kernel/fork.c:3405 [inline]
 __se_sys_unshare kernel/fork.c:3403 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3403
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f98dc181717
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffe118964c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f98dc345f40 RCX: 00007f98dc181717
RDX: 00007f98dc17ff19 RSI: 00007ffe11896490 RDI: 0000000040000000
RBP: 00007f98dc346738 R08: 00007f98dc2ff9d0 R09: 00007f98dc2ff9d0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5977 at net/ipv6/ip6mr.c:419 ip6mr_free_table+0xbd/0x120 net/ipv6/ip6mr.c:419
Modules linked in:
CPU: 1 UID: 0 PID: 5977 Comm: syz-executor Not tainted 6.13.0-rc1-syzkaller-00005-gceb8bf2ceaa7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ip6mr_free_table+0xbd/0x120 net/ipv6/ip6mr.c:419
Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 58 49 83 bc 24 c0 0e 00 00 00 74 09 e8 c4 c5 af f7 90 <0f> 0b 90 e8 bb c5 af f7 48 8d 7b 38 e8 22 86 9c f7 48 89 df be 0f
RSP: 0018:ffffc90003dd7bd8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880507fc000 RCX: ffffffff89ea4014
RDX: ffff8880297c2440 RSI: ffffffff89ea404c RDI: ffff888028a62d00
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: ffff888028a61e40
R13: ffff8880507fc000 R14: ffff8880507fc008 R15: dead000000000100
FS:  0000555566417500(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd00678048 CR3: 0000000030f1a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ip6mr_rules_exit+0x176/0x2d0 net/ipv6/ip6mr.c:283
 ip6mr_net_exit_batch+0x53/0xa0 net/ipv6/ip6mr.c:1388
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:177
 setup_net+0x4fe/0x860 net/core/net_namespace.c:394
 copy_net_ns+0x2b4/0x6b0 net/core/net_namespace.c:500
 create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x45d/0xa40 kernel/fork.c:3334
 __do_sys_unshare kernel/fork.c:3405 [inline]
 __se_sys_unshare kernel/fork.c:3403 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3403
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f98dc181717
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffe118964c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f98dc345f40 RCX: 00007f98dc181717
RDX: 00007f98dc17ff19 RSI: 00007ffe11896490 RDI: 0000000040000000
RBP: 00007f98dc346738 R08: 00007f98dc2ff9d0 R09: 00007f98dc2ff9d0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>