Extracting prog: 1m23.967827105s
Minimizing prog: 7m50.41502257s
Simplifying prog options: 0s
Extracting C: 1m20.11894602s
Simplifying C: 6m53.484033131s


extracting reproducer from 6 programs
first checking the prog from the crash report
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program crashed: kernel BUG in hpage_collapse_scan_file
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})

program did not crash
testing program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-madvise
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program did not crash
testing program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program did not crash
testing program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, 0xffffffffffffffff, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program did not crash
testing program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, 0x0, 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program did not crash
testing program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, 0x0)
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
simplifying C reproducer
testing compiled C program (duration=45.449745244s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
testing compiled C program (duration=45.449745244s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false 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}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
testing compiled C program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
testing compiled C program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
testing compiled C program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
testing compiled C program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
testing compiled C program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
program crashed: kernel BUG in hpage_collapse_scan_file
testing program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program crashed: kernel BUG in hpage_collapse_scan_file
validation run: crashed=true
testing program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program crashed: kernel BUG in hpage_collapse_scan_file
validation run: crashed=true
testing program (duration=45.449745244s, {Threaded:false Repeat:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$zero-mmap-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-madvise
detailed listing:
executing program 0:
r0 = openat$zero(0xffffffffffffff9c, &(0x7f00000000c0), 0x80002, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x100000e, 0x12, r0, 0x343e2000)
seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x7, &(0x7f0000000240)={0x0, 0x0})
madvise(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x19)

program crashed: kernel BUG in hpage_collapse_scan_file
validation run: crashed=true
reproducing took 22m29.983016674s
repro crashed as (corrupted=false):
------------[ cut here ]------------
kernel BUG at mm/khugepaged.c:1785!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4471 Comm: syz.0.16 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : collapse_file mm/khugepaged.c:1785 [inline]
pc : hpage_collapse_scan_file+0x3200/0x422c mm/khugepaged.c:2248
lr : collapse_file mm/khugepaged.c:1785 [inline]
lr : hpage_collapse_scan_file+0x3200/0x422c mm/khugepaged.c:2248
sp : ffff800020ce74a0
x29: ffff800020ce7700 x28: ffff0000c4bb1ca8 x27: ffff800020ce75e0
x26: ffff800020ce7600 x25: dfff800000000000 x24: 00000000000343e2
x23: ffff800020ce7560 x22: ffff0000d13ace38 x21: ffff0000d0d0c200
x20: 0000000000000001 x19: 00000000000001e2 x18: ffff800011aabce0
x17: ffff8000181e7000 x16: ffff8000082d0ec4 x15: 0000000000000000
x14: 0000000000000003 x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff00800008917b80 x10: 0000000000000000 x9 : ffff800008917b80
x8 : ffff0000d2698000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010
x2 : 0000000000000008 x1 : 00000000000001e2 x0 : 0000000000000000
Call trace:
 collapse_file mm/khugepaged.c:1785 [inline]
 hpage_collapse_scan_file+0x3200/0x422c mm/khugepaged.c:2248
 madvise_collapse+0x580/0xc10 mm/khugepaged.c:2703
 madvise_vma_behavior mm/madvise.c:1085 [inline]
 madvise_walk_vmas mm/madvise.c:1259 [inline]
 do_madvise+0x8f8/0x2920 mm/madvise.c:1438
 __do_sys_madvise mm/madvise.c:1451 [inline]
 __se_sys_madvise mm/madvise.c:1449 [inline]
 __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1449
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: aa1a03e0 97fa5974 d4210000 97ee27f3 (d4210000) 
---[ end trace 0000000000000000 ]---

final repro crashed as (corrupted=false):
------------[ cut here ]------------
kernel BUG at mm/khugepaged.c:1785!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4471 Comm: syz.0.16 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : collapse_file mm/khugepaged.c:1785 [inline]
pc : hpage_collapse_scan_file+0x3200/0x422c mm/khugepaged.c:2248
lr : collapse_file mm/khugepaged.c:1785 [inline]
lr : hpage_collapse_scan_file+0x3200/0x422c mm/khugepaged.c:2248
sp : ffff800020ce74a0
x29: ffff800020ce7700 x28: ffff0000c4bb1ca8 x27: ffff800020ce75e0
x26: ffff800020ce7600 x25: dfff800000000000 x24: 00000000000343e2
x23: ffff800020ce7560 x22: ffff0000d13ace38 x21: ffff0000d0d0c200
x20: 0000000000000001 x19: 00000000000001e2 x18: ffff800011aabce0
x17: ffff8000181e7000 x16: ffff8000082d0ec4 x15: 0000000000000000
x14: 0000000000000003 x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff00800008917b80 x10: 0000000000000000 x9 : ffff800008917b80
x8 : ffff0000d2698000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010
x2 : 0000000000000008 x1 : 00000000000001e2 x0 : 0000000000000000
Call trace:
 collapse_file mm/khugepaged.c:1785 [inline]
 hpage_collapse_scan_file+0x3200/0x422c mm/khugepaged.c:2248
 madvise_collapse+0x580/0xc10 mm/khugepaged.c:2703
 madvise_vma_behavior mm/madvise.c:1085 [inline]
 madvise_walk_vmas mm/madvise.c:1259 [inline]
 do_madvise+0x8f8/0x2920 mm/madvise.c:1438
 __do_sys_madvise mm/madvise.c:1451 [inline]
 __se_sys_madvise mm/madvise.c:1449 [inline]
 __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1449
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: aa1a03e0 97fa5974 d4210000 97ee27f3 (d4210000) 
---[ end trace 0000000000000000 ]---