Extracting prog: 41.522613739s
Minimizing prog: 22m35.791469243s
Simplifying prog options: 4m24.293602771s
Extracting C: 39.221637287s
Simplifying C: 0s


extracting reproducer from 24 programs
testing a last program of every proc
single: executing 5 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-connect$bt_l2cap-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
connect$bt_l2cap(0xffffffffffffffff, 0x0, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program crashed: WARNING: refcount bug in blk_done_softirq
single: successfully extracted reproducer
found reproducer with 10 syscalls
minimizing guilty program
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-connect$bt_l2cap-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
connect$bt_l2cap(0xffffffffffffffff, 0x0, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-connect$bt_l2cap-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
connect$bt_l2cap(0xffffffffffffffff, 0x0, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-connect$bt_l2cap-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
connect$bt_l2cap(0xffffffffffffffff, 0x0, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-connect$bt_l2cap-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
connect$bt_l2cap(0xffffffffffffffff, 0x0, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040))
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-connect$bt_l2cap-syz_open_dev$ndb-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
connect$bt_l2cap(0xffffffffffffffff, 0x0, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
ioctl$NBD_SET_SOCK(r1, 0xab00, 0xffffffffffffffff)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-connect$bt_l2cap-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
connect$bt_l2cap(0xffffffffffffffff, 0x0, 0x0)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r1=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(0xffffffffffffffff, 0xab00, r1)
ioctl$NBD_SET_SIZE_BLOCKS(0xffffffffffffffff, 0xab07, 0x4)
ioctl$NBD_DO_IT(0xffffffffffffffff, 0xab03)
ioctl$NBD_CLEAR_SOCK(0xffffffffffffffff, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program crashed: WARNING: refcount bug in blk_done_softirq
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
gettid()
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r0 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r1=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r0, 0xab00, r1)
ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x4)
ioctl$NBD_DO_IT(r0, 0xab03)
ioctl$NBD_CLEAR_SOCK(r0, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r0 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r1=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r0, 0xab00, r1)
ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x4)
ioctl$NBD_DO_IT(r0, 0xab03)
ioctl$NBD_CLEAR_SOCK(r0, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
gettid()
timer_create(0x0, 0x0, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r0 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r1=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r0, 0xab00, r1)
ioctl$NBD_SET_SIZE_BLOCKS(r0, 0xab07, 0x4)
ioctl$NBD_DO_IT(r0, 0xab03)
ioctl$NBD_CLEAR_SOCK(r0, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, 0x0)
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, 0x0, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r1 = syz_open_dev$ndb(0x0, 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, 0x0)
ioctl$NBD_SET_SOCK(r1, 0xab00, 0xffffffffffffffff)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
extracting C reproducer
testing compiled C program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
program crashed: WARNING: refcount bug in blk_mq_dispatch_rq_list
a never seen crash title: WARNING: refcount bug in blk_mq_dispatch_rq_list, ignore
simplifying guilty program options
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program did not crash
testing program (duration=52.972386753s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): gettid-timer_create-timer_settime-syz_open_dev$ndb-socketpair$nbd-ioctl$NBD_SET_SOCK-ioctl$NBD_SET_SIZE_BLOCKS-ioctl$NBD_DO_IT-ioctl$NBD_CLEAR_SOCK
detailed listing:
executing program 0:
r0 = gettid()
timer_create(0x0, &(0x7f0000533fa0)={0x0, 0x21, 0x800000000004, @tid=r0}, &(0x7f0000bbdffc))
timer_settime(0x0, 0x0, &(0x7f0000000280)={{0x0, 0x3938700}, {0x0, 0x3938700}}, 0x0)
r1 = syz_open_dev$ndb(&(0x7f0000000000), 0x0, 0x2)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r2=>0xffffffffffffffff})
ioctl$NBD_SET_SOCK(r1, 0xab00, r2)
ioctl$NBD_SET_SIZE_BLOCKS(r1, 0xab07, 0x4)
ioctl$NBD_DO_IT(r1, 0xab03)
ioctl$NBD_CLEAR_SOCK(r1, 0xab04)

program crashed: kernel BUG in end_bio_bh_io_sync
a never seen crash title: kernel BUG in end_bio_bh_io_sync, ignore
reproducing took 28m20.82933626s
repro crashed as (corrupted=false):
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 14 at lib/refcount.c:28 refcount_warn_saturate+0x14e/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:refcount_warn_saturate+0x14e/0x1a0 lib/refcount.c:28
Code: 09 01 48 c7 c7 c0 b5 f9 8a e8 2e 42 38 fd 0f 0b eb 8d e8 85 a8 6c fd c6 05 cb 10 e3 09 01 48 c7 c7 20 b6 f9 8a e8 12 42 38 fd <0f> 0b e9 6e ff ff ff e8 66 a8 6c fd c6 05 ad 10 e3 09 01 48 c7 c7
RSP: 0018:ffffc90000d37c80 EFLAGS: 00010246
RAX: 19acb288cbd26200 RBX: 0000000000000003 RCX: ffff88813ff21dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000003 R08: ffffffff8166aa8c R09: fffff520001a6ed1
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000004
R13: ffffffff8c80a0e0 R14: 0000000000000000 R15: ffff888020e70200
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000000280 CR3: 000000007958b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 blk_complete_reqs block/blk-mq.c:587 [inline]
 blk_done_softirq+0xf2/0x130 block/blk-mq.c:592
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 14 at lib/refcount.c:28 refcount_warn_saturate+0x14e/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:refcount_warn_saturate+0x14e/0x1a0 lib/refcount.c:28
Code: 09 01 48 c7 c7 c0 b5 f9 8a e8 2e 42 38 fd 0f 0b eb 8d e8 85 a8 6c fd c6 05 cb 10 e3 09 01 48 c7 c7 20 b6 f9 8a e8 12 42 38 fd <0f> 0b e9 6e ff ff ff e8 66 a8 6c fd c6 05 ad 10 e3 09 01 48 c7 c7
RSP: 0018:ffffc90000d37c80 EFLAGS: 00010246
RAX: 19acb288cbd26200 RBX: 0000000000000003 RCX: ffff88813ff21dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000003 R08: ffffffff8166aa8c R09: fffff520001a6ed1
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000004
R13: ffffffff8c80a0e0 R14: 0000000000000000 R15: ffff888020e70200
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000000280 CR3: 000000007958b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 blk_complete_reqs block/blk-mq.c:587 [inline]
 blk_done_softirq+0xf2/0x130 block/blk-mq.c:592
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>