Extracting prog: 7m47.002015401s
Minimizing prog: 55m31.553432092s
Simplifying prog options: 15m25.791867583s
Extracting C: 5m9.016926656s
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}}): openat-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

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}}): openat-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

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}}): openat-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=6m7.408458048s, {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-pipe2$9p
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0), 0x0)

program did not crash
testing program (duration=6m7.408458048s, {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-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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}}): pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
pipe2$9p(&(0x7f00000000c0)={<r0=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, 0x0, 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(0x0, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, 0x0, &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', 0x0, 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0), 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
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=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
extracting C reproducer
testing compiled C program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program did not crash
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
testing program (duration=6m7.408458048s, {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-pipe2$9p-mount$9p_fd
detailed listing:
executing program 0:
r0 = openat(0xffffffffffffff9c, &(0x7f0000000240)='./file0\x00', 0x42, 0x85) (rerun: 32)
pipe2$9p(&(0x7f00000000c0)={<r1=>0xffffffffffffffff}, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000004380), 0x0, &(0x7f0000000300)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}, 0x2c, {[], [], 0x6b}})

program crashed: BUG: MAX_LOCKDEP_CHAINS too low!
validation run: crashed=true
reproducing took 1h36m25.456022209s
repro crashed as (corrupted=false):
hsr_slave_1: entered promiscuous mode
debugfs: 'hsr0' already exists in 'hsr'
Cannot create hsr debugfs directory
netdevsim netdevsim7 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 7452 Comm: syz-executor Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xfdc/0x2ebc kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x164/0xf14 kernel/locking/mutex.c:821
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874
 dev_pm_qos_constraints_destroy+0x5c/0x36c drivers/base/power/qos.c:263
 dpm_sysfs_remove+0x70/0xc8 drivers/base/power/sysfs.c:831
 device_del+0x15c/0x71c drivers/base/core.c:3936
 netdev_unregister_kobject+0x2a8/0x39c net/core/net-sysfs.c:2308
 unregister_netdevice_many_notify+0x1234/0x1758 net/core/dev.c:12479
 unregister_netdevice_many net/core/dev.c:12507 [inline]
 unregister_netdevice_queue+0x274/0x30c net/core/dev.c:12319
 unregister_netdevice include/linux/netdevice.h:3472 [inline]
 nsim_destroy+0x248/0x5f8 drivers/net/netdevsim/netdev.c:1196
 __nsim_dev_port_del+0x13c/0x1ec drivers/net/netdevsim/dev.c:1547
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline]
 nsim_dev_reload_destroy+0x13c/0x210 drivers/net/netdevsim/dev.c:1785
 nsim_drv_remove+0x5c/0x114 drivers/net/netdevsim/dev.c:1800
 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:427
 device_remove+0xc4/0x134 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x124/0x20c drivers/base/dd.c:1372
 device_release_driver+0x28/0x38 drivers/base/dd.c:1395
 bus_remove_device+0x2d0/0x400 drivers/base/bus.c:664
 device_del+0x3ec/0x71c drivers/base/core.c:3961
 device_unregister+0x2c/0xf0 drivers/base/core.c:4002
 nsim_bus_dev_del+0x60/0x8c drivers/net/netdevsim/bus.c:491
 del_device_store+0x24c/0x2d4 drivers/net/netdevsim/bus.c:244
 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:687
 ksys_write+0x12c/0x228 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x84/0x98 fs/read_write.c:747
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:738
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590
netdevsim netdevsim7 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim7 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim7 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim7 netdevsim0: renamed from eth0
8021q: adding VLAN 0 to HW filter on device netdevsim0
netdevsim netdevsim7 netdevsim1: renamed from eth1
8021q: adding VLAN 0 to HW filter on device netdevsim1
netdevsim netdevsim7 netdevsim2: renamed from eth2
8021q: adding VLAN 0 to HW filter on device netdevsim2
netdevsim netdevsim7 netdevsim3: renamed from eth3
8021q: adding VLAN 0 to HW filter on device netdevsim3
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered forwarding state
8021q: adding VLAN 0 to HW filter on device bond0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device batadv0
veth0_vlan: entered promiscuous mode
veth1_vlan: entered promiscuous mode
veth0_macvtap: entered promiscuous mode
veth1_macvtap: entered promiscuous mode
batman_adv: batadv0: Interface activated: batadv_slave_0
batman_adv: batadv0: Interface activated: batadv_slave_1
ieee80211 phy137: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy138: Selected rate control algorithm 'minstrel_ht'

final repro crashed as (corrupted=false):
hsr_slave_1: entered promiscuous mode
debugfs: 'hsr0' already exists in 'hsr'
Cannot create hsr debugfs directory
netdevsim netdevsim7 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 7452 Comm: syz-executor Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xfdc/0x2ebc kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x164/0xf14 kernel/locking/mutex.c:821
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874
 dev_pm_qos_constraints_destroy+0x5c/0x36c drivers/base/power/qos.c:263
 dpm_sysfs_remove+0x70/0xc8 drivers/base/power/sysfs.c:831
 device_del+0x15c/0x71c drivers/base/core.c:3936
 netdev_unregister_kobject+0x2a8/0x39c net/core/net-sysfs.c:2308
 unregister_netdevice_many_notify+0x1234/0x1758 net/core/dev.c:12479
 unregister_netdevice_many net/core/dev.c:12507 [inline]
 unregister_netdevice_queue+0x274/0x30c net/core/dev.c:12319
 unregister_netdevice include/linux/netdevice.h:3472 [inline]
 nsim_destroy+0x248/0x5f8 drivers/net/netdevsim/netdev.c:1196
 __nsim_dev_port_del+0x13c/0x1ec drivers/net/netdevsim/dev.c:1547
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline]
 nsim_dev_reload_destroy+0x13c/0x210 drivers/net/netdevsim/dev.c:1785
 nsim_drv_remove+0x5c/0x114 drivers/net/netdevsim/dev.c:1800
 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:427
 device_remove+0xc4/0x134 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x124/0x20c drivers/base/dd.c:1372
 device_release_driver+0x28/0x38 drivers/base/dd.c:1395
 bus_remove_device+0x2d0/0x400 drivers/base/bus.c:664
 device_del+0x3ec/0x71c drivers/base/core.c:3961
 device_unregister+0x2c/0xf0 drivers/base/core.c:4002
 nsim_bus_dev_del+0x60/0x8c drivers/net/netdevsim/bus.c:491
 del_device_store+0x24c/0x2d4 drivers/net/netdevsim/bus.c:244
 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:687
 ksys_write+0x12c/0x228 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x84/0x98 fs/read_write.c:747
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:738
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590
netdevsim netdevsim7 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim7 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim7 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim7 netdevsim0: renamed from eth0
8021q: adding VLAN 0 to HW filter on device netdevsim0
netdevsim netdevsim7 netdevsim1: renamed from eth1
8021q: adding VLAN 0 to HW filter on device netdevsim1
netdevsim netdevsim7 netdevsim2: renamed from eth2
8021q: adding VLAN 0 to HW filter on device netdevsim2
netdevsim netdevsim7 netdevsim3: renamed from eth3
8021q: adding VLAN 0 to HW filter on device netdevsim3
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: port 1(bridge_slave_0) entered blocking state
bridge0: port 1(bridge_slave_0) entered forwarding state
8021q: adding VLAN 0 to HW filter on device bond0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device batadv0
veth0_vlan: entered promiscuous mode
veth1_vlan: entered promiscuous mode
veth0_macvtap: entered promiscuous mode
veth1_macvtap: entered promiscuous mode
batman_adv: batadv0: Interface activated: batadv_slave_0
batman_adv: batadv0: Interface activated: batadv_slave_1
ieee80211 phy137: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy138: Selected rate control algorithm 'minstrel_ht'