Extracting prog: 4m38.321448646s
Minimizing prog: 55m17.469827417s
Simplifying prog options: 0s
Extracting C: 3m7.761130766s
Simplifying C: 23m40.902643654s


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: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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-open-mmap-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
r1 = open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0)
mmap(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x27fffff, 0x4002011, r1, 0xb5ff3000)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program crashed: INFO: task hung in do_exit
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-open-mmap
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
r1 = open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0)
mmap(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x27fffff, 0x4002011, r1, 0xb5ff3000)

program did not crash
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-open-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program crashed: INFO: task hung in do_exit
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program crashed: INFO: task hung in do_exit
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {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}}): io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
io_uring_enter(0xffffffffffffffff, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(0xffffffffffffffff, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, 0x0, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, 0x0, &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), 0x0, &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), 0x0)
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: INFO: task hung in do_exit
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: INFO: task hung in do_exit
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: INFO: task hung in do_exit
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: INFO: task hung in do_exit
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: INFO: task hung in do_exit
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: INFO: task hung in do_exit
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
program crashed: INFO: task hung in do_exit
testing program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program crashed: INFO: task hung in do_exit
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program crashed: INFO: task hung in do_exit
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON
detailed listing:
executing program 0:
r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000))
io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0)
io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0)

program crashed: INFO: task hung in do_exit
validation run: crashed=true
reproducing took 1h36m39.403825813s
repro crashed as (corrupted=false):
INFO: task syz.0.17:5947 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:25320 pid:5947  ppid:5908   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 coredump_task_exit kernel/exit.c:436 [inline]
 do_exit+0x4db/0x2460 kernel/exit.c:825
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 get_signal+0x12fc/0x13f0 kernel/signal.c:2902
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdb1ad9cdd9
RSP: 002b:00007ffe70e0c248 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 000000000002a633 RCX: 00007fdb1ad9cdd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fdb1b01609c
RBP: 0000000000000032 R08: 0000000000745d1e R09: 0000000000000000
R10: 00007ffe70e0c350 R11: 0000000000000246 R12: 00007ffe70e0c370
R13: 00007fdb1b01609c R14: 000000000002a665 R15: 00007ffe70e0c350
 </TASK>
INFO: task syz.0.17:5949 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:27920 pid:5949  ppid:5908   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0xc1/0x2d0 kernel/time/timer.c:2144
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common+0x3e4/0x6f0 kernel/sched/completion.c:116
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:443 [inline]
 do_coredump+0x8d9/0x24d0 fs/coredump.c:640
 get_signal+0x1133/0x13f0 kernel/signal.c:2888
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdb1ad9cdd9
RSP: 002b:00007fdb1bc420e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007fdb1b016098 RCX: 00007fdb1ad9cdd9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fdb1b01609c
RBP: 00007fdb1b016090 R08: 0000000000745d1e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdb1b016128 R14: 00007ffe70e0c000 R15: 00007ffe70e0c0e8
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:1/9:
1 lock held by khungtaskd/29:
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by kworker/u4:5/77:
2 locks held by getty/5531:
 #0: ffff88803187a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x433/0x1390 drivers/tty/n_tty.c:2217
1 lock held by syz.1.18/5973:
1 lock held by syz.2.19/5990:
1 lock held by syz.3.20/6009:
2 locks held by syz.4.21/6038:
1 lock held by syz.6.23/6094:
1 lock held by syz.7.24/6125:

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf3d/0xf80 kernel/hung_task.c:379
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6038 Comm: syz.4.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_preemption_disabled+0x42/0x110 lib/smp_processor_id.c:55
Code: 65 8b 05 bd 35 7d 75 65 8b 0d b2 35 7d 75 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04
RSP: 0018:ffffc900036279a8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 892c461b87185d00
RDX: 0000000000000000 RSI: ffffffff8acad6c0 RDI: ffffffff8b1c8fa0
RBP: ffffc90003627ae8 R08: ffffffff8e8b19af R09: 1ffffffff1d16335
R10: dffffc0000000000 R11: fffffbfff1d16336 R12: 1ffff920006c4f48
R13: ffff88805e20e0a8 R14: 0000000000000246 R15: dffffc0000000000
FS:  00007f94bfa336c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555d047e64f0 CR3: 000000002fb54000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
 lock_acquire+0x164/0x420 kernel/locking/lockdep.c:5753
 __mutex_lock_common kernel/locking/mutex.c:603 [inline]
 __mutex_lock+0x136/0xcc0 kernel/locking/mutex.c:747
 io_cqring_do_overflow_flush+0x19/0x30 io_uring/io_uring.c:722
 io_cqring_wait io_uring/io_uring.c:2646 [inline]
 __do_sys_io_uring_enter io_uring/io_uring.c:3824 [inline]
 __se_sys_io_uring_enter+0x1b65/0x2540 io_uring/io_uring.c:3714
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f94beb9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f94bfa33028 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f94bee15fa0 RCX: 00007f94beb9cdd9
RDX: 000000000000235c RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f94bec32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94bee16038 R14: 00007f94bee15fa0 R15: 00007fff982780b8
 </TASK>

final repro crashed as (corrupted=false):
INFO: task syz.0.17:5947 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:25320 pid:5947  ppid:5908   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 coredump_task_exit kernel/exit.c:436 [inline]
 do_exit+0x4db/0x2460 kernel/exit.c:825
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 get_signal+0x12fc/0x13f0 kernel/signal.c:2902
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdb1ad9cdd9
RSP: 002b:00007ffe70e0c248 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 000000000002a633 RCX: 00007fdb1ad9cdd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fdb1b01609c
RBP: 0000000000000032 R08: 0000000000745d1e R09: 0000000000000000
R10: 00007ffe70e0c350 R11: 0000000000000246 R12: 00007ffe70e0c370
R13: 00007fdb1b01609c R14: 000000000002a665 R15: 00007ffe70e0c350
 </TASK>
INFO: task syz.0.17:5949 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:27920 pid:5949  ppid:5908   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0xc1/0x2d0 kernel/time/timer.c:2144
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common+0x3e4/0x6f0 kernel/sched/completion.c:116
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:443 [inline]
 do_coredump+0x8d9/0x24d0 fs/coredump.c:640
 get_signal+0x1133/0x13f0 kernel/signal.c:2888
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdb1ad9cdd9
RSP: 002b:00007fdb1bc420e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007fdb1b016098 RCX: 00007fdb1ad9cdd9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fdb1b01609c
RBP: 00007fdb1b016090 R08: 0000000000745d1e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdb1b016128 R14: 00007ffe70e0c000 R15: 00007ffe70e0c0e8
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:1/9:
1 lock held by khungtaskd/29:
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by kworker/u4:5/77:
2 locks held by getty/5531:
 #0: ffff88803187a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x433/0x1390 drivers/tty/n_tty.c:2217
1 lock held by syz.1.18/5973:
1 lock held by syz.2.19/5990:
1 lock held by syz.3.20/6009:
2 locks held by syz.4.21/6038:
1 lock held by syz.6.23/6094:
1 lock held by syz.7.24/6125:

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf3d/0xf80 kernel/hung_task.c:379
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6038 Comm: syz.4.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_preemption_disabled+0x42/0x110 lib/smp_processor_id.c:55
Code: 65 8b 05 bd 35 7d 75 65 8b 0d b2 35 7d 75 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04
RSP: 0018:ffffc900036279a8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 892c461b87185d00
RDX: 0000000000000000 RSI: ffffffff8acad6c0 RDI: ffffffff8b1c8fa0
RBP: ffffc90003627ae8 R08: ffffffff8e8b19af R09: 1ffffffff1d16335
R10: dffffc0000000000 R11: fffffbfff1d16336 R12: 1ffff920006c4f48
R13: ffff88805e20e0a8 R14: 0000000000000246 R15: dffffc0000000000
FS:  00007f94bfa336c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555d047e64f0 CR3: 000000002fb54000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
 lock_acquire+0x164/0x420 kernel/locking/lockdep.c:5753
 __mutex_lock_common kernel/locking/mutex.c:603 [inline]
 __mutex_lock+0x136/0xcc0 kernel/locking/mutex.c:747
 io_cqring_do_overflow_flush+0x19/0x30 io_uring/io_uring.c:722
 io_cqring_wait io_uring/io_uring.c:2646 [inline]
 __do_sys_io_uring_enter io_uring/io_uring.c:3824 [inline]
 __se_sys_io_uring_enter+0x1b65/0x2540 io_uring/io_uring.c:3714
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f94beb9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f94bfa33028 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f94bee15fa0 RCX: 00007f94beb9cdd9
RDX: 000000000000235c RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f94bec32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94bee16038 R14: 00007f94bee15fa0 R15: 00007fff982780b8
 </TASK>