Extracting prog: 2m33.33743004s
Minimizing prog: 7m27.293671076s
Simplifying prog options: 0s
Extracting C: 55.959076376s
Simplifying C: 9m59.753610379s


extracting reproducer from 24 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:4 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}}): shmget$private-shmat-mlock-munlock
detailed listing:
executing program 0:
r0 = shmget$private(0x0, 0x4000, 0x100, &(0x7f0000ffb000/0x4000)=nil)
shmat(r0, &(0x7f0000ffc000/0x4000)=nil, 0x7000)
mlock(&(0x7f0000ffe000/0x2000)=nil, 0x2000)
munlock(&(0x7f0000ffd000/0x3000)=nil, 0x3000)

program crashed: WARNING in vma_modify
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=45.424369537s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): shmget$private-shmat-mlock
detailed listing:
executing program 0:
r0 = shmget$private(0x0, 0x4000, 0x100, &(0x7f0000ffb000/0x4000)=nil)
shmat(r0, &(0x7f0000ffc000/0x4000)=nil, 0x7000)
mlock(&(0x7f0000ffe000/0x2000)=nil, 0x2000)

program did not crash
testing program (duration=45.424369537s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): shmget$private-shmat-munlock
detailed listing:
executing program 0:
r0 = shmget$private(0x0, 0x4000, 0x100, &(0x7f0000ffb000/0x4000)=nil)
shmat(r0, &(0x7f0000ffc000/0x4000)=nil, 0x7000)
munlock(&(0x7f0000ffd000/0x3000)=nil, 0x3000)

program did not crash
testing program (duration=45.424369537s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): shmget$private-mlock-munlock
detailed listing:
executing program 0:
shmget$private(0x0, 0x4000, 0x100, &(0x7f0000ffb000/0x4000)=nil)
mlock(&(0x7f0000ffe000/0x2000)=nil, 0x2000)
munlock(&(0x7f0000ffd000/0x3000)=nil, 0x3000)

program did not crash
testing program (duration=45.424369537s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): shmat-mlock-munlock
detailed listing:
executing program 0:
shmat(0x0, &(0x7f0000ffc000/0x4000)=nil, 0x7000)
mlock(&(0x7f0000ffe000/0x2000)=nil, 0x2000)
munlock(&(0x7f0000ffd000/0x3000)=nil, 0x3000)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.424369537s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
simplifying C reproducer
testing compiled C program (duration=45.424369537s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
testing compiled C program (duration=45.424369537s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
testing compiled C program (duration=45.424369537s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
testing compiled C program (duration=45.424369537s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
testing compiled C program (duration=45.424369537s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
testing compiled C program (duration=45.424369537s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
testing compiled C program (duration=45.424369537s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
program crashed: WARNING in vma_modify
testing program (duration=45.424369537s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
detailed listing:
executing program 0:
r0 = shmget$private(0x0, 0x4000, 0x100, &(0x7f0000ffb000/0x4000)=nil)
shmat(r0, &(0x7f0000ffc000/0x4000)=nil, 0x7000)
mlock(&(0x7f0000ffe000/0x2000)=nil, 0x2000)
munlock(&(0x7f0000ffd000/0x3000)=nil, 0x3000)

program crashed: WARNING in vma_modify
validation run: crashed=true
testing program (duration=45.424369537s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
detailed listing:
executing program 0:
r0 = shmget$private(0x0, 0x4000, 0x100, &(0x7f0000ffb000/0x4000)=nil)
shmat(r0, &(0x7f0000ffc000/0x4000)=nil, 0x7000)
mlock(&(0x7f0000ffe000/0x2000)=nil, 0x2000)
munlock(&(0x7f0000ffd000/0x3000)=nil, 0x3000)

program crashed: WARNING in vma_modify
validation run: crashed=true
testing program (duration=45.424369537s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): shmget$private-shmat-mlock-munlock
detailed listing:
executing program 0:
r0 = shmget$private(0x0, 0x4000, 0x100, &(0x7f0000ffb000/0x4000)=nil)
shmat(r0, &(0x7f0000ffc000/0x4000)=nil, 0x7000)
mlock(&(0x7f0000ffe000/0x2000)=nil, 0x2000)
munlock(&(0x7f0000ffd000/0x3000)=nil, 0x3000)

program crashed: WARNING in vma_modify
validation run: crashed=true
reproducing took 25m22.182491715s
repro crashed as (corrupted=false):
    7f6e27a2d000-7f6e27a2efff: ffff8880751f8dc0
    7f6e27a2f000-7f6e27a30fff: ffff8880751f8c80
    7f6e27a31000-7ffd02d70fff: 0000000000000000
    7ffd02d71000-7ffd02d91fff: ffff8880751f8b40
    7ffd02d92000-ffffffffffffffff: 0000000000000000
------------[ cut here ]------------
WARNING: mm/vma.c:818 at vma_merge_existing_range mm/vma.c:818 [inline], CPU#0: syz.0.17/6002
WARNING: mm/vma.c:818 at vma_modify+0x1614/0x1a70 mm/vma.c:1611, CPU#0: syz.0.17/6002
Modules linked in:
CPU: 0 UID: 0 PID: 6002 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:vma_merge_existing_range mm/vma.c:818 [inline]
RIP: 0010:vma_modify+0x1614/0x1a70 mm/vma.c:1611
Code: 0b 90 e9 c4 ec ff ff e8 ea e5 a8 ff 90 0f 0b 90 e9 04 ec ff ff e8 dc e5 a8 ff 4c 89 f7 48 c7 c6 60 e6 96 8b e8 5d 85 f2 ff 90 <0f> 0b 90 e9 6a ec ff ff e8 bf e5 a8 ff e9 59 ed ff ff e8 b5 e5 a8
RSP: 0018:ffffc90003287ae8 EFLAGS: 00010282
RAX: ffffffff8b5d946d RBX: 0000200000ffe000 RCX: ffff8880298d0000
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffffffffffffff
RBP: ffffc90003287c20 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1c3a708 R12: 0000200000ffe000
R13: dffffc0000000000 R14: ffffc90003287c00 R15: 1ffff92000650f84
FS:  000055558c04e500(0000) GS:ffff888125a72000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055574d204db0 CR3: 00000000740d8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 vma_modify_flags+0x1e8/0x230 mm/vma.c:1652
 mlock_fixup+0x24b/0x3b0 mm/mlock.c:481
 apply_vma_lock_flags+0x285/0x390 mm/mlock.c:554
 __do_sys_munlock mm/mlock.c:691 [inline]
 __se_sys_munlock+0x150/0x270 mm/mlock.c:680
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e26b8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd02d8ff18 EFLAGS: 00000246 ORIG_RAX: 0000000000000096
RAX: ffffffffffffffda RBX: 00007f6e26de5fa0 RCX: 00007f6e26b8f749
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000200000ffd000
RBP: 00007f6e26c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6e26de5fa0 R14: 00007f6e26de5fa0 R15: 0000000000000002
 </TASK>

final repro crashed as (corrupted=false):
    7f6e27a2d000-7f6e27a2efff: ffff8880751f8dc0
    7f6e27a2f000-7f6e27a30fff: ffff8880751f8c80
    7f6e27a31000-7ffd02d70fff: 0000000000000000
    7ffd02d71000-7ffd02d91fff: ffff8880751f8b40
    7ffd02d92000-ffffffffffffffff: 0000000000000000
------------[ cut here ]------------
WARNING: mm/vma.c:818 at vma_merge_existing_range mm/vma.c:818 [inline], CPU#0: syz.0.17/6002
WARNING: mm/vma.c:818 at vma_modify+0x1614/0x1a70 mm/vma.c:1611, CPU#0: syz.0.17/6002
Modules linked in:
CPU: 0 UID: 0 PID: 6002 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:vma_merge_existing_range mm/vma.c:818 [inline]
RIP: 0010:vma_modify+0x1614/0x1a70 mm/vma.c:1611
Code: 0b 90 e9 c4 ec ff ff e8 ea e5 a8 ff 90 0f 0b 90 e9 04 ec ff ff e8 dc e5 a8 ff 4c 89 f7 48 c7 c6 60 e6 96 8b e8 5d 85 f2 ff 90 <0f> 0b 90 e9 6a ec ff ff e8 bf e5 a8 ff e9 59 ed ff ff e8 b5 e5 a8
RSP: 0018:ffffc90003287ae8 EFLAGS: 00010282
RAX: ffffffff8b5d946d RBX: 0000200000ffe000 RCX: ffff8880298d0000
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffffffffffffff
RBP: ffffc90003287c20 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1c3a708 R12: 0000200000ffe000
R13: dffffc0000000000 R14: ffffc90003287c00 R15: 1ffff92000650f84
FS:  000055558c04e500(0000) GS:ffff888125a72000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055574d204db0 CR3: 00000000740d8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 vma_modify_flags+0x1e8/0x230 mm/vma.c:1652
 mlock_fixup+0x24b/0x3b0 mm/mlock.c:481
 apply_vma_lock_flags+0x285/0x390 mm/mlock.c:554
 __do_sys_munlock mm/mlock.c:691 [inline]
 __se_sys_munlock+0x150/0x270 mm/mlock.c:680
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e26b8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd02d8ff18 EFLAGS: 00000246 ORIG_RAX: 0000000000000096
RAX: ffffffffffffffda RBX: 00007f6e26de5fa0 RCX: 00007f6e26b8f749
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000200000ffd000
RBP: 00007f6e26c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6e26de5fa0 R14: 00007f6e26de5fa0 R15: 0000000000000002
 </TASK>