Extracting prog: 10m58.596845247s
Minimizing prog: 35m56.807970442s
Simplifying prog options: 0s
Extracting C: 3m38.580105203s
Simplifying C: 25m51.010062266s


extracting reproducer from 30 programs
testing a last program of every proc
single: executing 5 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$nl_route-socket$can_bcm-bpf$MAP_CREATE-socketpair-bpf$MAP_UPDATE_ELEM-bpf$MAP_UPDATE_ELEM-getsockname$packet-ioctl$ifreq_SIOCGIFINDEX_vcan-connect$can_bcm-sendmsg$can_bcm-ioctl$sock_SIOCGIFINDEX_80211-socket$nl_route-socket$nl_route-socket$nl_netfilter-openat$tun-socket-socket$unix-socket-socket$unix-socket-setsockopt$netlink_NETLINK_TX_RING-sendmsg$nl_generic-socket$nl_route-ioctl-socket$can_bcm-ioctl$ifreq_SIOCGIFINDEX_vcan-syz_init_net_socket$bt_l2cap-connect$bt_l2cap-socket$isdn-close
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
r1 = socket$can_bcm(0x1d, 0x2, 0x2)
r2 = bpf$MAP_CREATE(0x0, &(0x7f0000000280)=ANY=[@ANYRESHEX=r1, @ANYRESHEX, @ANYRESDEC=r1, @ANYRESDEC=r0, @ANYRESOCT=0x0, @ANYRES32=r0, @ANYRES16=r1], 0x50) (async)
socketpair(0x1, 0x2, 0x0, &(0x7f0000000040)={0xffffffffffffffff, <r3=>0xffffffffffffffff})
bpf$MAP_UPDATE_ELEM(0x2, &(0x7f00000005c0)={r2, &(0x7f00000003c0), &(0x7f0000000580)=@tcp=r3}, 0x20) (async)
bpf$MAP_UPDATE_ELEM(0x2, &(0x7f0000000440)={r2, &(0x7f00000003c0), &(0x7f0000000300)=@tcp6=r3, 0x2}, 0x20)
getsockname$packet(r3, &(0x7f0000000080)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @link_local}, &(0x7f0000000240)=0x14)
ioctl$ifreq_SIOCGIFINDEX_vcan(r1, 0x8933, &(0x7f0000000180)={'vxcan0\x00', <r4=>0x0})
connect$can_bcm(r1, &(0x7f0000000140)={0x1d, r4}, 0x10) (async)
sendmsg$can_bcm(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000400)=ANY=[@ANYBLOB="05"], 0x48}, 0x1, 0x0, 0x0, 0x4000}, 0x0) (async)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, &(0x7f0000000040)={'wlan1\x00'}) (async)
socket$nl_route(0x10, 0x3, 0x0) (async)
socket$nl_route(0x10, 0x3, 0x0) (async)
socket$nl_netfilter(0x10, 0x3, 0xc)
openat$tun(0xffffffffffffff9c, &(0x7f00000001c0), 0x0, 0x0)
socket(0x25, 0x2, 0x0)
socket$unix(0x1, 0x5, 0x0) (async)
socket(0x400000000010, 0x3, 0x0) (async)
socket$unix(0x1, 0x5, 0x0) (async)
r5 = socket(0x10, 0x3, 0x0)
setsockopt$netlink_NETLINK_TX_RING(r5, 0x10e, 0xc, &(0x7f0000000380)={0x29e9c931, 0x3, 0x0, 0x4}, 0x10)
sendmsg$nl_generic(r5, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000010c0)=ANY=[@ANYBLOB="200000001600010a00000000000000000a0000000c0000800800", @ANYRES16=r5], 0x20}, 0x1, 0x0, 0x0, 0x200c0801}, 0x0) (async)
r6 = socket$nl_route(0x10, 0x3, 0x0)
ioctl(r6, 0xbe9f, &(0x7f0000000600)="323a205f9d6d43b5d3ef9078eebff6bd0b50e4ac90adc8a93c9a7b5638576c1760b4ef3c04a01d950855a72c072841bc368e9a22ac06fe5f51723f0f985d4476f1989206a427df92cba3d6e1a9b150669890ca27165f3cc4fc4ef0fed0727cba255aeb1c506ab9684c23a6ccc18369a076d89e855acb349703e4f6c0bf4c000000000000") (async)
r7 = socket$can_bcm(0x1d, 0x2, 0x2)
ioctl$ifreq_SIOCGIFINDEX_vcan(r7, 0x8933, &(0x7f0000000100)={'vxcan0\x00'}) (async)
r8 = syz_init_net_socket$bt_l2cap(0x1f, 0x2, 0x0)
connect$bt_l2cap(r8, &(0x7f0000000080)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0xe}, 0x7fe, 0xffffffffffffffff}, 0xe) (async)
socket$isdn(0x22, 0x2, 0x21)
close(0x3)

program did not crash
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}}): syz_init_net_socket$nfc_raw-openat$nci-syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$nfc-ioctl$IOCTL_GET_NCIDEV_IDX-sendmsg$NFC_CMD_DEV_UP-write$nci
detailed listing:
executing program 0:
syz_init_net_socket$nfc_raw(0x27, 0x3, 0x0)
r0 = openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)
r1 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_genetlink_get_family_id$nfc(&(0x7f0000000300), r1)
ioctl$IOCTL_GET_NCIDEV_IDX(r0, 0x0, &(0x7f00000000c0)=<r3=>0x0)
sendmsg$NFC_CMD_DEV_UP(r1, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000d80)=ANY=[@ANYBLOB="1c000000", @ANYRES16=r2, @ANYBLOB="010426bd7000f8dbdf2502000000080001", @ANYRES32=r3], 0x1c}}, 0x4008054)
write$nci(r0, &(0x7f0000000dc0)=ANY=[], 0x4)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
single: successfully extracted reproducer
found reproducer with 7 syscalls
minimizing guilty program
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}}): syz_init_net_socket$nfc_raw-openat$nci-syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$nfc-ioctl$IOCTL_GET_NCIDEV_IDX-sendmsg$NFC_CMD_DEV_UP
detailed listing:
executing program 0:
syz_init_net_socket$nfc_raw(0x27, 0x3, 0x0)
r0 = openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)
r1 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
r2 = syz_genetlink_get_family_id$nfc(&(0x7f0000000300), r1)
ioctl$IOCTL_GET_NCIDEV_IDX(r0, 0x0, &(0x7f00000000c0)=<r3=>0x0)
sendmsg$NFC_CMD_DEV_UP(r1, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000d80)=ANY=[@ANYBLOB="1c000000", @ANYRES16=r2, @ANYBLOB="010426bd7000f8dbdf2502000000080001", @ANYRES32=r3], 0x1c}}, 0x4008054)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
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}}): syz_init_net_socket$nfc_raw-openat$nci-syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$nfc-ioctl$IOCTL_GET_NCIDEV_IDX
detailed listing:
executing program 0:
syz_init_net_socket$nfc_raw(0x27, 0x3, 0x0)
r0 = openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)
r1 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$nfc(&(0x7f0000000300), r1)
ioctl$IOCTL_GET_NCIDEV_IDX(r0, 0x0, &(0x7f00000000c0))

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
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}}): syz_init_net_socket$nfc_raw-openat$nci-syz_init_net_socket$nl_generic-syz_genetlink_get_family_id$nfc
detailed listing:
executing program 0:
syz_init_net_socket$nfc_raw(0x27, 0x3, 0x0)
openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)
r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$nfc(&(0x7f0000000300), r0)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
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}}): syz_init_net_socket$nfc_raw-openat$nci-syz_init_net_socket$nl_generic
detailed listing:
executing program 0:
syz_init_net_socket$nfc_raw(0x27, 0x3, 0x0)
openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)
syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
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}}): syz_init_net_socket$nfc_raw-openat$nci
detailed listing:
executing program 0:
syz_init_net_socket$nfc_raw(0x27, 0x3, 0x0)
openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
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}}): syz_init_net_socket$nfc_raw
detailed listing:
executing program 0:
syz_init_net_socket$nfc_raw(0x27, 0x3, 0x0)

program did not crash
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}}): openat$nci
detailed listing:
executing program 0:
openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
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}}): openat$nci
detailed listing:
executing program 0:
openat$nci(0xffffffffffffff9c, 0x0, 0x2, 0x0)

program did not crash
extracting C reproducer
testing compiled C 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}}): openat$nci
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nci
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nci
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nci
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nci
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nci
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nci
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nci
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nci
detailed listing:
executing program 0:
openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nci
detailed listing:
executing program 0:
openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nci
detailed listing:
executing program 0:
openat$nci(0xffffffffffffff9c, &(0x7f0000000080), 0x2, 0x0)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
validation run: crashed=true
reproducing took 1h26m47.79536229s
repro crashed as (corrupted=false):
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 27585 Comm: syz.1.5245 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 register_lock_class+0x2a9/0x2e0 kernel/locking/lockdep.c:1332
 __lock_acquire+0xad/0x2cf0 kernel/locking/lockdep.c:5112
 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:3991
 __flush_workqueue+0x14b/0x14f0 kernel/workqueue.c:4033
 drain_workqueue+0xd3/0x390 kernel/workqueue.c:4197
 destroy_workqueue+0xbb/0xc60 kernel/workqueue.c:5967
 nci_unregister_device+0xd4/0x260 net/nfc/nci/core.c:1332
 virtual_ncidev_close+0x56/0x90 drivers/nfc/virtual_ncidev.c:168
 __fput+0x44f/0xa70 fs/file_table.c:469
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe74539c799
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:00007ffce89210e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffce89211d0 RCX: 00007fe74539c799
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000059e35 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2d020000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe745615fac R14: 00007fe745615fa8 R15: 00007fe745615fa0
 </TASK>

final repro crashed as (corrupted=false):
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 27585 Comm: syz.1.5245 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 register_lock_class+0x2a9/0x2e0 kernel/locking/lockdep.c:1332
 __lock_acquire+0xad/0x2cf0 kernel/locking/lockdep.c:5112
 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:3991
 __flush_workqueue+0x14b/0x14f0 kernel/workqueue.c:4033
 drain_workqueue+0xd3/0x390 kernel/workqueue.c:4197
 destroy_workqueue+0xbb/0xc60 kernel/workqueue.c:5967
 nci_unregister_device+0xd4/0x260 net/nfc/nci/core.c:1332
 virtual_ncidev_close+0x56/0x90 drivers/nfc/virtual_ncidev.c:168
 __fput+0x44f/0xa70 fs/file_table.c:469
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe74539c799
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:00007ffce89210e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffce89211d0 RCX: 00007fe74539c799
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000059e35 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2d020000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe745615fac R14: 00007fe745615fa8 R15: 00007fe745615fa0
 </TASK>