Extracting prog: 6m16.239150631s
Minimizing prog: 15m8.482122449s
Simplifying prog options: 0s
Extracting C: 2m9.430766045s
Simplifying C: 10m33.757570985s


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$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$AUTOFS_IOC_FAIL(r0, 0x4c80, 0xffffffffffffffb6)

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$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$AUTOFS_IOC_FAIL(r0, 0x4c80, 0xffffffffffffffb6)

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$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$AUTOFS_IOC_FAIL(r0, 0x4c80, 0xffffffffffffffb6)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=4m57.167834436s, {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$loop_ctrl
detailed listing:
executing program 0:
openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)

program did not crash
testing program (duration=4m57.167834436s, {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}}): ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_FAIL(0xffffffffffffffff, 0x4c80, 0xffffffffffffffb6)

program did not crash
testing program (duration=4m57.167834436s, {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$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffffffffffff9c, 0x0, 0x0, 0x0)
ioctl$AUTOFS_IOC_FAIL(r0, 0x4c80, 0xffffffffffffffb6)

program did not crash
extracting C reproducer
testing compiled C program (duration=4m57.167834436s, {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$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
simplifying C reproducer
testing compiled C program (duration=4m57.167834436s, {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$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=4m57.167834436s, {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$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing compiled C program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
program crashed: BUG: MAX_LOCKDEP_KEYS too low!
testing program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$AUTOFS_IOC_FAIL(r0, 0x4c80, 0xffffffffffffffb6)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
validation run: crashed=true
testing program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$AUTOFS_IOC_FAIL(r0, 0x4c80, 0xffffffffffffffb6)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
validation run: crashed=true
testing program (duration=4m57.167834436s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$loop_ctrl-ioctl$AUTOFS_IOC_FAIL
detailed listing:
executing program 0:
r0 = openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$AUTOFS_IOC_FAIL(r0, 0x4c80, 0xffffffffffffffb6)

program crashed: BUG: MAX_LOCKDEP_KEYS too low!
validation run: crashed=true
reproducing took 40m26.138216207s
repro crashed as (corrupted=false):
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 9145 Comm: syz.0.2941 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 register_lock_class+0x5e6/0x7b0 kernel/locking/lockdep.c:1376
 __lock_acquire+0x25d/0x1f40 kernel/locking/lockdep.c:5162
 lock_acquire kernel/locking/lockdep.c:5942 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
 blk_freeze_acquire_lock block/blk.h:766 [inline]
 blk_freeze_queue_start+0xf9/0x150 block/blk-mq.c:185
 blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206
 blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline]
 rq_qos_add+0x165/0x460 block/blk-rq-qos.c:341
 wbt_init+0x331/0x440 block/blk-wbt.c:981
 wbt_init_enable_default+0x89/0x170 block/blk-wbt.c:788
 blk_register_queue+0x4a8/0x630 block/blk-sysfs.c:995
 __add_disk+0x7dd/0xf10 block/genhd.c:531
 add_disk_fwnode+0x118/0x480 block/genhd.c:600
 add_disk include/linux/blkdev.h:798 [inline]
 loop_add+0x90b/0xb60 drivers/block/loop.c:2116
 loop_control_ioctl+0xae/0x620 drivers/block/loop.c:2243
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1269b9e159
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:00007fff9ff2d968 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1269e25fa0 RCX: 00007f1269b9e159
RDX: ffffffffffffffb6 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007f1269c3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1269e25fac R14: 00007f1269e25fa0 R15: 00007f1269e25fa0
 </TASK>

final repro crashed as (corrupted=false):
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 9145 Comm: syz.0.2941 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 register_lock_class+0x5e6/0x7b0 kernel/locking/lockdep.c:1376
 __lock_acquire+0x25d/0x1f40 kernel/locking/lockdep.c:5162
 lock_acquire kernel/locking/lockdep.c:5942 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
 blk_freeze_acquire_lock block/blk.h:766 [inline]
 blk_freeze_queue_start+0xf9/0x150 block/blk-mq.c:185
 blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206
 blk_mq_freeze_queue include/linux/blk-mq.h:956 [inline]
 rq_qos_add+0x165/0x460 block/blk-rq-qos.c:341
 wbt_init+0x331/0x440 block/blk-wbt.c:981
 wbt_init_enable_default+0x89/0x170 block/blk-wbt.c:788
 blk_register_queue+0x4a8/0x630 block/blk-sysfs.c:995
 __add_disk+0x7dd/0xf10 block/genhd.c:531
 add_disk_fwnode+0x118/0x480 block/genhd.c:600
 add_disk include/linux/blkdev.h:798 [inline]
 loop_add+0x90b/0xb60 drivers/block/loop.c:2116
 loop_control_ioctl+0xae/0x620 drivers/block/loop.c:2243
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1269b9e159
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:00007fff9ff2d968 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1269e25fa0 RCX: 00007f1269b9e159
RDX: ffffffffffffffb6 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007f1269c3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1269e25fac R14: 00007f1269e25fa0 R15: 00007f1269e25fa0
 </TASK>