Extracting prog: 1m2.943093788s
Minimizing prog: 9m18.283546617s
Simplifying prog options: 0s
Extracting C: 1m23.940169739s
Simplifying C: 10m54.658887383s


extracting reproducer from 30 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-fcntl$lock-mprotect-timer_settime-getgroups
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000200)={0x0, 0x21, 0x2, @tid=0xffffffffffffffff}, &(0x7f0000000300))
fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(0x0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program crashed: Internal error in sys_getgroups
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=40.328934535s, {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}}): timer_create-fcntl$lock-mprotect-timer_settime
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000200)={0x0, 0x21, 0x2, @tid=0xffffffffffffffff}, &(0x7f0000000300))
fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
timer_settime(0x0, 0x1, &(0x7f0000000040)={{}, {0x0, 0x989680}}, 0x0)

program did not crash
testing program (duration=40.328934535s, {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}}): timer_create-fcntl$lock-mprotect-getgroups
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000200)={0x0, 0x21, 0x2, @tid=0xffffffffffffffff}, &(0x7f0000000300))
fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x5})
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program crashed: Internal error in sys_getgroups
testing program (duration=40.328934535s, {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}}): timer_create-fcntl$lock-getgroups
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000200)={0x0, 0x21, 0x2, @tid=0xffffffffffffffff}, &(0x7f0000000300))
fcntl$lock(0xffffffffffffffff, 0x25, &(0x7f0000000040)={0x0, 0x0, 0x60d3, 0x5})
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program did not crash
testing program (duration=40.328934535s, {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}}): timer_create-mprotect-getgroups
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000200)={0x0, 0x21, 0x2, @tid=0xffffffffffffffff}, &(0x7f0000000300))
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program crashed: Internal error in sys_getgroups
testing program (duration=40.328934535s, {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}}): mprotect-getgroups
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program crashed: Internal error in sys_mount
testing program (duration=40.328934535s, {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}}): mprotect-getgroups
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
getgroups(0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=40.328934535s, {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}}): mprotect-getgroups
program crashed: Internal error in sys_getgroups
simplifying C reproducer
testing compiled C program (duration=40.328934535s, {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}}): mprotect-getgroups
program crashed: Internal error in sys_getgroups
testing compiled C program (duration=40.328934535s, {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}}): mprotect-getgroups
program crashed: Internal error in sys_getgroups
testing compiled C program (duration=40.328934535s, {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}}): mprotect-getgroups
program crashed: Internal error in sys_getgroups
testing compiled C program (duration=40.328934535s, {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}}): mprotect-getgroups
program crashed: Internal error in sys_getgroups
testing compiled C program (duration=40.328934535s, {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}}): mprotect-getgroups
program crashed: Internal error in sys_getgroups
testing compiled C program (duration=40.328934535s, {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}}): mprotect-getgroups
program did not crash
testing compiled C program (duration=40.328934535s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-getgroups
program crashed: Internal error in sys_getgroups
testing program (duration=40.328934535s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-getgroups
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program crashed: Internal error in sys_getgroups
validation run: crashed=true
testing program (duration=40.328934535s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-getgroups
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program crashed: Internal error in sys_getgroups
validation run: crashed=true
testing program (duration=40.328934535s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-getgroups
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
getgroups(0x2, &(0x7f0000000180)=[0xffffffffffffffff, 0xffffffffffffffff])

program crashed: Internal error in sys_getgroups
validation run: crashed=true
reproducing took 26m48.578688611s
repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4245 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : groups_to_user kernel/groups.c:47 [inline]
pc : __do_sys_getgroups kernel/groups.c:163 [inline]
pc : __se_sys_getgroups kernel/groups.c:148 [inline]
pc : __arm64_sys_getgroups+0x288/0x358 kernel/groups.c:148
lr : groups_to_user kernel/groups.c:47 [inline]
lr : __do_sys_getgroups kernel/groups.c:163 [inline]
lr : __se_sys_getgroups kernel/groups.c:148 [inline]
lr : __arm64_sys_getgroups+0x264/0x358 kernel/groups.c:148
sp : ffff80001fdc7cf0
x29: ffff80001fdc7d20 x28: 0000000000000000 x27: dfff800000000000
x26: 00000000fffffff2 x25: 0000000000000000 x24: 0000002000018000
x23: ffff0000d79cb6a4 x22: 0000000000000000 x21: 1fffe0001af396d4
x20: 0000000020000180 x19: ffff0000d79cb680 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008221e08 x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000000020000180
x8 : 0000000020000180 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 groups_to_user kernel/groups.c:47 [inline]
 __do_sys_getgroups kernel/groups.c:163 [inline]
 __se_sys_getgroups kernel/groups.c:148 [inline]
 __arm64_sys_getgroups+0x288/0x358 kernel/groups.c:148
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d503229f 2a1603fa 2a1603e0 b8000939 (2a1a03e1) 
---[ end trace 41193e0796678d62 ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1603fa 	mov	w26, w22
   8:	2a1603e0 	mov	w0, w22
   c:	b8000939 	sttr	w25, [x9]
* 10:	2a1a03e1 	mov	w1, w26 <-- trapping instruction

final repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4245 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : groups_to_user kernel/groups.c:47 [inline]
pc : __do_sys_getgroups kernel/groups.c:163 [inline]
pc : __se_sys_getgroups kernel/groups.c:148 [inline]
pc : __arm64_sys_getgroups+0x288/0x358 kernel/groups.c:148
lr : groups_to_user kernel/groups.c:47 [inline]
lr : __do_sys_getgroups kernel/groups.c:163 [inline]
lr : __se_sys_getgroups kernel/groups.c:148 [inline]
lr : __arm64_sys_getgroups+0x264/0x358 kernel/groups.c:148
sp : ffff80001fdc7cf0
x29: ffff80001fdc7d20 x28: 0000000000000000 x27: dfff800000000000
x26: 00000000fffffff2 x25: 0000000000000000 x24: 0000002000018000
x23: ffff0000d79cb6a4 x22: 0000000000000000 x21: 1fffe0001af396d4
x20: 0000000020000180 x19: ffff0000d79cb680 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008221e08 x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000000020000180
x8 : 0000000020000180 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 groups_to_user kernel/groups.c:47 [inline]
 __do_sys_getgroups kernel/groups.c:163 [inline]
 __se_sys_getgroups kernel/groups.c:148 [inline]
 __arm64_sys_getgroups+0x288/0x358 kernel/groups.c:148
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d503229f 2a1603fa 2a1603e0 b8000939 (2a1a03e1) 
---[ end trace 41193e0796678d62 ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1603fa 	mov	w26, w22
   8:	2a1603e0 	mov	w0, w22
   c:	b8000939 	sttr	w25, [x9]
* 10:	2a1a03e1 	mov	w1, w26 <-- trapping instruction