Extracting prog: 2m26.392727195s
Minimizing prog: 8m48.351166573s
Simplifying prog options: 4m45.398438478s
Extracting C: 55.946195616s
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: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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program crashed: WARNING in do_notify_parent
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)

program did not crash
testing program (duration=45.716304784s, {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}}): timer_create-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.716304784s, {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}}): timer_settime-syz_clone
detailed listing:
executing program 0:
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, 0x0, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, 0x0)
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, 0x0, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
program did not crash
simplifying guilty program options
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.716304784s, {Threaded:true 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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.716304784s, {Threaded:true 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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program crashed: WARNING in do_notify_parent
validation run: crashed=true
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program crashed: WARNING in do_notify_parent
validation run: crashed=true
testing program (duration=45.716304784s, {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}}): timer_create-timer_settime-syz_clone
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000000080)={0x0, 0x11, 0x0, @thr={0x0, 0x0}}, &(0x7f0000000000))
timer_settime(0x0, 0x0, &(0x7f0000000240)={{0x0, 0x8}, {0x0, 0x9}}, 0x0)
syz_clone(0x2280, 0x0, 0x0, 0x0, 0x0, 0x0)

program crashed: WARNING in do_notify_parent
validation run: crashed=true
reproducing took 21m14.297398965s
repro crashed as (corrupted=false):
------------[ cut here ]------------
!valid_signal(sig)
WARNING: kernel/signal.c:2174 at do_notify_parent+0xc7e/0xd70 kernel/signal.c:2174, CPU#1: syz.3.20/6119
Modules linked in:
CPU: 1 UID: 0 PID: 6119 Comm: syz.3.20 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:do_notify_parent+0xc7e/0xd70 kernel/signal.c:2174
Code: c6 05 2c 05 93 0e 01 48 c7 c7 c0 46 cb 8b be a3 08 00 00 48 c7 c2 40 48 cb 8b e8 6d 53 17 00 e9 c6 fa ff ff e8 a3 00 3b 00 90 <0f> 0b 90 45 31 e4 e9 1c ff ff ff e8 92 00 3b 00 90 0f 0b 90 e9 75
RSP: 0018:ffffc90002e87c40 EFLAGS: 00010093
RAX: ffffffff818aed2d RBX: dffffc0000000000 RCX: ffff88802c2d5b80
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000040
RBP: ffffc90002e87d90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520005d0fa4 R12: ffff888027cc95d0
R13: ffff88802c2d5b80 R14: 0000000000000080 R15: 1ffff920005d0f90
FS:  0000000000000000(0000) GS:ffff8881250f7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21fc216028 CR3: 000000002de6c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 exit_notify kernel/exit.c:756 [inline]
 do_exit+0x15b3/0x2580 kernel/exit.c:986
 __do_sys_exit kernel/exit.c:1083 [inline]
 __se_sys_exit kernel/exit.c:1081 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:1081
 x64_sys_call+0x2231/0x2240 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f21fbf9c799
Code: Unable to access opcode bytes at 0x7f21fbf9c76f.
RSP: 002b:00007f21fcebcfd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007f21fc215fa0 RCX: 00007f21fbf9c799
RDX: 00007f21fcebd9c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f21fc032bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21fc216038 R14: 00007f21fc215fa0 R15: 00007ffc788d5338
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
!valid_signal(sig)
WARNING: kernel/signal.c:2174 at do_notify_parent+0xc7e/0xd70 kernel/signal.c:2174, CPU#1: syz.3.20/6119
Modules linked in:
CPU: 1 UID: 0 PID: 6119 Comm: syz.3.20 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:do_notify_parent+0xc7e/0xd70 kernel/signal.c:2174
Code: c6 05 2c 05 93 0e 01 48 c7 c7 c0 46 cb 8b be a3 08 00 00 48 c7 c2 40 48 cb 8b e8 6d 53 17 00 e9 c6 fa ff ff e8 a3 00 3b 00 90 <0f> 0b 90 45 31 e4 e9 1c ff ff ff e8 92 00 3b 00 90 0f 0b 90 e9 75
RSP: 0018:ffffc90002e87c40 EFLAGS: 00010093
RAX: ffffffff818aed2d RBX: dffffc0000000000 RCX: ffff88802c2d5b80
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000040
RBP: ffffc90002e87d90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520005d0fa4 R12: ffff888027cc95d0
R13: ffff88802c2d5b80 R14: 0000000000000080 R15: 1ffff920005d0f90
FS:  0000000000000000(0000) GS:ffff8881250f7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21fc216028 CR3: 000000002de6c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 exit_notify kernel/exit.c:756 [inline]
 do_exit+0x15b3/0x2580 kernel/exit.c:986
 __do_sys_exit kernel/exit.c:1083 [inline]
 __se_sys_exit kernel/exit.c:1081 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:1081
 x64_sys_call+0x2231/0x2240 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f21fbf9c799
Code: Unable to access opcode bytes at 0x7f21fbf9c76f.
RSP: 002b:00007f21fcebcfd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007f21fc215fa0 RCX: 00007f21fbf9c799
RDX: 00007f21fcebd9c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f21fc032bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21fc216038 R14: 00007f21fc215fa0 R15: 00007ffc788d5338
 </TASK>