Extracting prog: 8m29.726420794s
Minimizing prog: 36m21.70096053s
Simplifying prog options: 14m32.854315592s
Extracting C: 5m10.876054194s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 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: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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program crashed: lost connection to test machine
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=7m11.852836182s, {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$nl_route
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)

program did not crash
testing program (duration=7m11.852836182s, {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}}): sendmsg$nl_route
detailed listing:
executing program 0:
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, 0x0, 0x0)

program did not crash
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={0x0}, 0x1, 0xd}, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=7m11.852836182s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program crashed: WARNING in print_bfs_bug
validation run: crashed=true
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
validation run: crashed=true
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=7m11.852836182s, {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$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000200)=@newlink={0x40, 0x10, 0x401, 0x0, 0x0, {}, [@IFLA_LINKINFO={0x18, 0x12, 0x0, 0x1, @wireguard={{0xe}, {0x4}}}, @IFLA_MASTER={0x8, 0x3}]}, 0x40}, 0x1, 0xd}, 0x0)

program did not crash
validation run: crashed=false
reproducing took 2h8m53.634027357s
repro crashed as (corrupted=false):
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 23204 Comm: syz.0.5513 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 register_lock_class+0x4a4/0x560 kernel/locking/lockdep.c:1332
 __lock_acquire+0x3cb/0x2630 kernel/locking/lockdep.c:5112
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1cf/0x380 kernel/locking/lockdep.c:5825
 touch_wq_lockdep_map+0xad/0x1c0 kernel/workqueue.c:3991
 __flush_workqueue+0x131/0x1200 kernel/workqueue.c:4033
 drain_workqueue+0x175/0x3b0 kernel/workqueue.c:4197
 destroy_workqueue+0xc3/0xa30 kernel/workqueue.c:5967
 wg_newlink+0x5be/0x7a0 drivers/net/wireguard/device.c:397
 rtnl_newlink_create net/core/rtnetlink.c:3862 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3993 [inline]
 rtnl_newlink+0x1499/0x2380 net/core/rtnetlink.c:4108
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6994
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2592
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2646
 __sys_sendmsg+0x170/0x220 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa014d9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa015d10028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa015015fa0 RCX: 00007fa014d9c819
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007fa014e32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa015016038 R14: 00007fa015015fa0 R15: 00007fffc0b33cd8
 </TASK>

final repro crashed as (corrupted=false):
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 23204 Comm: syz.0.5513 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 register_lock_class+0x4a4/0x560 kernel/locking/lockdep.c:1332
 __lock_acquire+0x3cb/0x2630 kernel/locking/lockdep.c:5112
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1cf/0x380 kernel/locking/lockdep.c:5825
 touch_wq_lockdep_map+0xad/0x1c0 kernel/workqueue.c:3991
 __flush_workqueue+0x131/0x1200 kernel/workqueue.c:4033
 drain_workqueue+0x175/0x3b0 kernel/workqueue.c:4197
 destroy_workqueue+0xc3/0xa30 kernel/workqueue.c:5967
 wg_newlink+0x5be/0x7a0 drivers/net/wireguard/device.c:397
 rtnl_newlink_create net/core/rtnetlink.c:3862 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3993 [inline]
 rtnl_newlink+0x1499/0x2380 net/core/rtnetlink.c:4108
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6994
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2592
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2646
 __sys_sendmsg+0x170/0x220 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa014d9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa015d10028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa015015fa0 RCX: 00007fa014d9c819
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007fa014e32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa015016038 R14: 00007fa015015fa0 R15: 00007fffc0b33cd8
 </TASK>