Extracting prog: 2m1.42855676s
Minimizing prog: 11m51.784243056s
Simplifying prog options: 0s
Extracting C: 1m26.258062118s
Simplifying C: 10m14.593750903s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): prlimit64-sched_setscheduler-syz_io_uring_setup-syz_io_uring_setup
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000600)={0x9, 0x20000008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x9)
r0 = syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, &(0x7f00000001c0), &(0x7f00000005c0), &(0x7f0000000000))
syz_io_uring_setup(0x3c5f, &(0x7f0000000240)={0x0, 0x100081, 0x27, 0x2, 0x0, 0x0, r0}, 0x0, 0x0, &(0x7f0000000000))

program crashed: WARNING in io_sq_thread_stop
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): prlimit64-sched_setscheduler-syz_io_uring_setup
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000600)={0x9, 0x20000008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x9)
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, &(0x7f00000001c0), &(0x7f00000005c0), &(0x7f0000000000))

program crashed: WARNING in io_sq_thread_stop
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): prlimit64-sched_setscheduler
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000600)={0x9, 0x20000008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x9)

program did not crash
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): prlimit64-syz_io_uring_setup
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000600)={0x9, 0x20000008b}, 0x0)
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, &(0x7f00000001c0), &(0x7f00000005c0), &(0x7f0000000000))

program crashed: WARNING in io_sq_thread_stop
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, &(0x7f00000001c0), &(0x7f00000005c0), &(0x7f0000000000))

program crashed: WARNING in io_sq_thread_stop
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, 0x0, &(0x7f00000001c0), &(0x7f00000005c0), &(0x7f0000000000))

program did not crash
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, 0x0, &(0x7f00000005c0), &(0x7f0000000000))

program crashed: WARNING in io_sq_thread_stop
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, 0x0, 0x0, &(0x7f0000000000))

program crashed: WARNING in io_sq_thread_stop
testing program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, 0x0, 0x0, 0x0)

program crashed: WARNING in io_sq_thread_stop
extracting C reproducer
testing compiled C program (duration=1m15.224547964s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
simplifying C reproducer
testing compiled C program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
testing compiled C program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace 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}}): syz_io_uring_setup
program crashed: WARNING in corrupted
a never seen crash title: WARNING in corrupted, ignore
testing compiled C program (duration=1m15.224547964s, {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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
testing compiled C program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
testing compiled C program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
testing compiled C program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
testing compiled C program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
testing compiled C program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
program crashed: WARNING in io_sq_thread_stop
testing program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, 0x0, 0x0, 0x0)

program crashed: WARNING in io_sq_thread_stop
validation run: crashed=true
testing program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, 0x0, 0x0, 0x0)

program crashed: WARNING in io_sq_thread_stop
validation run: crashed=true
testing program (duration=1m15.224547964s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_io_uring_setup
detailed listing:
executing program 0:
syz_io_uring_setup(0x31c7, &(0x7f0000000140)={0x0, 0x0, 0x2, 0x0, 0xfffffffc}, 0x0, 0x0, 0x0)

program crashed: WARNING in io_sq_thread_stop
validation run: crashed=true
reproducing took 31m15.689141215s
repro crashed as (corrupted=false):
------------[ cut here ]------------
test_bit(IO_SQ_THREAD_SHOULD_STOP, &sqd->state)
WARNING: io_uring/sqpoll.c:88 at io_sq_thread_stop+0x17e/0x1a0 io_uring/sqpoll.c:88, CPU#1: kworker/u8:9/1155
Modules linked in:
CPU: 1 UID: 0 PID: 1155 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:io_sq_thread_stop+0x17e/0x1a0 io_uring/sqpoll.c:88
Code: c6 05 59 64 c1 0c 01 48 c7 c7 20 3c 8c 8c be 26 00 00 00 48 c7 c2 60 3c 8c 8c e8 7d 9a be fc e9 4f ff ff ff e8 d3 48 e3 fc 90 <0f> 0b 90 e9 e1 fe ff ff e8 c5 48 e3 fc 90 0f 0b 90 e9 6e ff ff ff
RSP: 0018:ffffc900053bf890 EFLAGS: 00010293
RAX: ffffffff84e5c7cd RBX: ffff88807bdf5800 RCX: ffff888029bf3e80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807bdf591f R09: 1ffff1100f7beb23
R10: dffffc0000000000 R11: ffffed100f7beb24 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88807bdf5918 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888123511000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66701f4158 CR3: 000000005856c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 io_put_sq_data+0x8a/0x150 io_uring/sqpoll.c:105
 io_sq_thread_finish+0x1fd/0x240 io_uring/sqpoll.c:130
 io_ring_ctx_free+0x2d/0x5f0 io_uring/io_uring.c:2322
 io_ring_exit_work+0x5b4/0x650 io_uring/io_uring.c:2658
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
test_bit(IO_SQ_THREAD_SHOULD_STOP, &sqd->state)
WARNING: io_uring/sqpoll.c:88 at io_sq_thread_stop+0x17e/0x1a0 io_uring/sqpoll.c:88, CPU#1: kworker/u8:9/1155
Modules linked in:
CPU: 1 UID: 0 PID: 1155 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:io_sq_thread_stop+0x17e/0x1a0 io_uring/sqpoll.c:88
Code: c6 05 59 64 c1 0c 01 48 c7 c7 20 3c 8c 8c be 26 00 00 00 48 c7 c2 60 3c 8c 8c e8 7d 9a be fc e9 4f ff ff ff e8 d3 48 e3 fc 90 <0f> 0b 90 e9 e1 fe ff ff e8 c5 48 e3 fc 90 0f 0b 90 e9 6e ff ff ff
RSP: 0018:ffffc900053bf890 EFLAGS: 00010293
RAX: ffffffff84e5c7cd RBX: ffff88807bdf5800 RCX: ffff888029bf3e80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807bdf591f R09: 1ffff1100f7beb23
R10: dffffc0000000000 R11: ffffed100f7beb24 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88807bdf5918 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888123511000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66701f4158 CR3: 000000005856c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 io_put_sq_data+0x8a/0x150 io_uring/sqpoll.c:105
 io_sq_thread_finish+0x1fd/0x240 io_uring/sqpoll.c:130
 io_ring_ctx_free+0x2d/0x5f0 io_uring/io_uring.c:2322
 io_ring_exit_work+0x5b4/0x650 io_uring/io_uring.c:2658
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>