Extracting prog: 3m27.354367232s
Minimizing prog: 1h11m5.032711674s
Simplifying prog options: 0s
Extracting C: 3m10.921634415s
Simplifying C: 23m54.828158706s


extracting reproducer from 68 programs
first checking the prog from the crash report
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx-ioctl$TIOCSETD-ioctl$TCFLSH-ioctl$TIOCSTI-mount-socket$xdp-setsockopt$sock_int-socket$tipc
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)
ioctl$TIOCSETD(r2, 0x5423, &(0x7f00000000c0)=0xf) (async)
ioctl$TCFLSH(r2, 0x400455c8, 0x0) (async)
ioctl$TIOCSTI(r2, 0x5412, &(0x7f0000000180)=0x1)
mount(&(0x7f0000000100)=@rnullb, &(0x7f0000000040)='./cgroup\x00', &(0x7f0000000080)='cramfs\x00', 0xa2a015, 0x0) (async)
r3 = socket$xdp(0x2c, 0x3, 0x0)
setsockopt$sock_int(r3, 0x1, 0x2f, &(0x7f0000000040)=0xffffffff, 0x4) (async)
socket$tipc(0x1e, 0x5, 0x0)

program crashed: INFO: task hung in comedi_unlocked_ioctl
single: successfully extracted reproducer
found reproducer with 15 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx-ioctl$TIOCSETD-ioctl$TCFLSH-ioctl$TIOCSTI-mount-socket$xdp-setsockopt$sock_int
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)
ioctl$TIOCSETD(r2, 0x5423, &(0x7f00000000c0)=0xf) (async)
ioctl$TCFLSH(r2, 0x400455c8, 0x0) (async)
ioctl$TIOCSTI(r2, 0x5412, &(0x7f0000000180)=0x1)
mount(&(0x7f0000000100)=@rnullb, &(0x7f0000000040)='./cgroup\x00', &(0x7f0000000080)='cramfs\x00', 0xa2a015, 0x0) (async)
r3 = socket$xdp(0x2c, 0x3, 0x0)
setsockopt$sock_int(r3, 0x1, 0x2f, &(0x7f0000000040)=0xffffffff, 0x4) (async)

program crashed: INFO: task hung in comedi_unlocked_ioctl
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx-ioctl$TIOCSETD-ioctl$TCFLSH-ioctl$TIOCSTI-mount-socket$xdp
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)
ioctl$TIOCSETD(r2, 0x5423, &(0x7f00000000c0)=0xf) (async)
ioctl$TCFLSH(r2, 0x400455c8, 0x0) (async)
ioctl$TIOCSTI(r2, 0x5412, &(0x7f0000000180)=0x1)
mount(&(0x7f0000000100)=@rnullb, &(0x7f0000000040)='./cgroup\x00', &(0x7f0000000080)='cramfs\x00', 0xa2a015, 0x0) (async)
socket$xdp(0x2c, 0x3, 0x0)

program crashed: INFO: task hung in comedi_unlocked_ioctl
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx-ioctl$TIOCSETD-ioctl$TCFLSH-ioctl$TIOCSTI-mount
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)
ioctl$TIOCSETD(r2, 0x5423, &(0x7f00000000c0)=0xf) (async)
ioctl$TCFLSH(r2, 0x400455c8, 0x0) (async)
ioctl$TIOCSTI(r2, 0x5412, &(0x7f0000000180)=0x1)
mount(&(0x7f0000000100)=@rnullb, &(0x7f0000000040)='./cgroup\x00', &(0x7f0000000080)='cramfs\x00', 0xa2a015, 0x0) (async)

program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx-ioctl$TIOCSETD-ioctl$TCFLSH-ioctl$TIOCSTI
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)
ioctl$TIOCSETD(r2, 0x5423, &(0x7f00000000c0)=0xf) (async)
ioctl$TCFLSH(r2, 0x400455c8, 0x0) (async)
ioctl$TIOCSTI(r2, 0x5412, &(0x7f0000000180)=0x1)

program crashed: INFO: task hung in comedi_unlocked_ioctl
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx-ioctl$TIOCSETD-ioctl$TCFLSH
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)
ioctl$TIOCSETD(r2, 0x5423, &(0x7f00000000c0)=0xf) (async)
ioctl$TCFLSH(r2, 0x400455c8, 0x0) (async)

program crashed: INFO: task hung in comedi_unlocked_ioctl
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx-ioctl$TIOCSETD
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)
ioctl$TIOCSETD(r2, 0x5423, &(0x7f00000000c0)=0xf) (async)

program crashed: INFO: task hung in comedi_unlocked_ioctl
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD-openat$ptmx
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)
openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x88ce359bdb02163c, 0x0)

program crashed: INFO: task hung in comedi_unlocked_ioctl
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_SETWSUBD
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)
ioctl$COMEDI_SETWSUBD(r0, 0x6411) (async)

program crashed: INFO: task hung in comedi_unlocked_ioctl
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)

program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-sendmsg$RDMA_NLDEV_CMD_SYS_GET
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = socket$nl_rdma(0x10, 0x3, 0x14)
sendmsg$RDMA_NLDEV_CMD_SYS_GET(r1, &(0x7f00000002c0)={&(0x7f0000000000)={0x10, 0x0, 0x0, 0x100}, 0xc, &(0x7f0000000240)={&(0x7f0000000140)={0x20, 0x1406, 0x400, 0x70bd2b, 0x25dfdbfd, "", [@RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}, @RDMA_NLDEV_ATTR_DEV_INDEX={0x8, 0x1, 0x2}]}, 0x20}}, 0x80)

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-socket$nl_rdma-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
socket$nl_rdma(0x10, 0x3, 0x14)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)

program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-socket$inet6_tcp-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
socket$inet6_tcp(0xa, 0x1, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)

program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)

program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)

program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
ioctl$COMEDI_DEVCONFIG(0xffffffffffffffff, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]}) (async)

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]})

program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, 0x0, 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]})

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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
program crashed: INFO: task hung in comedi_open
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
program crashed: INFO: task hung in comedi_open
testing compiled C program (duration=6m0s, {Threaded:false 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}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
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:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
program crashed: INFO: task hung in comedi_open
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
program crashed: INFO: task hung in comedi_open
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
program crashed: INFO: task hung in comedi_unlocked_ioctl
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
program crashed: INFO: task hung in comedi_open
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
program crashed: INFO: task hung in comedi_open
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]})

program crashed: INFO: task hung in comedi_open
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]})

program crashed: INFO: task hung in comedi_open
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$comedi-ioctl$COMEDI_DEVCONFIG
detailed listing:
executing program 0:
r0 = openat$comedi(0xffffffffffffff9c, &(0x7f0000000080)='/dev/comedi3\x00', 0x400, 0x0)
ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000180)={'multiq3\x00', [0x4f27, 0x5, 0x10000002, 0xa, 0x5, 0xcc5, 0xf, 0x7, 0xa, 0xe8aa, 0x2, 0x1, 0xfffffffd, 0x1, 0x6, 0x103, 0x0, 0x1a446, 0x7, 0x40000003, 0x8, 0xcaa7, 0x0, 0x20001e5c, 0x7, 0xe6b, 0x3c, 0x8, 0x2, 0xfffffffe, 0xfffefff8]})

program crashed: INFO: task hung in comedi_open
validation run: crashed=true
reproducing took 1h51m34.294365874s
repro crashed as (corrupted=false):
INFO: task syz.3.20:6071 blocked for more than 143 seconds.
      Not tainted 6.16.0-next-20250731-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20        state:D stack:27240 pid:6071  tgid:6071  ppid:5989   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1360 kernel/locking/mutex.c:760
 comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
 chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414
 do_dentry_open+0x953/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f978478eb69
RSP: 002b:00007ffe9aaa1f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f97849b5fa0 RCX: 00007f978478eb69
RDX: 0000000000000400 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f9784811df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f97849b5fa0 R14: 00007f97849b5fa0 R15: 0000000000000004
 </TASK>
INFO: task syz.2.19:6072 blocked for more than 143 seconds.
      Not tainted 6.16.0-next-20250731-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19        state:D stack:27240 pid:6072  tgid:6072  ppid:5986   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1360 kernel/locking/mutex.c:760
 comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
 chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414
 do_dentry_open+0x953/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff100d8eb69
RSP: 002b:00007ffcf1e84a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff100fb5fa0 RCX: 00007ff100d8eb69
RDX: 0000000000000400 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007ff100e11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff100fb5fa0 R14: 00007ff100fb5fa0 R15: 0000000000000004
 </TASK>
INFO: task syz.1.18:6073 blocked for more than 144 seconds.
      Not tainted 6.16.0-next-20250731-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.18        state:D stack:27240 pid:6073  tgid:6073  ppid:5985   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1360 kernel/locking/mutex.c:760
 comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
 chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414
 do_dentry_open+0x953/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf0bb8eb69
RSP: 002b:00007ffc7d038718 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcf0bdb5fa0 RCX: 00007fcf0bb8eb69
RDX: 0000000000000400 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fcf0bc11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcf0bdb5fa0 R14: 00007fcf0bdb5fa0 R15: 0000000000000004
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8e539f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8e539f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8e539f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:11/3003:
2 locks held by getty/5607:
 #0: ffff88814e0d80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by kworker/u9:3/5991:
 #0: ffff8880262d2148 ((wq_completion)hci25){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
 #0: ffff8880262d2148 ((wq_completion)hci25){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3319
 #1: ffffc90003697bc0 ((work_completion)(&hdev->power_on)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3212 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3319
 #2: ffff88804e500dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:428 [inline]
 #2: ffff88804e500dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_power_on+0x1ac/0x680 net/bluetooth/hci_core.c:959
3 locks held by kworker/0:6/6050:
2 locks held by syz.0.17/6070:
1 lock held by syz.3.20/6071:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.2.19/6072:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.1.18/6073:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.4.21/6181:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.6.23/6183:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.7.24/6184:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.5.22/6185:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.8.25/6267:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.0.27/6278:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.9.26/6280:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.1.28/6281:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.2.29/6351:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.3.30/6377:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.5.32/6383:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.4.31/6384:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.6.33/6445:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.7.34/6481:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.9.36/6487:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.8.35/6490:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.0.37/6544:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.1.38/6579:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.2.39/6580:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.3.40/6581:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.4.41/6610:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
5 locks held by syz-executor/6611:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-next-20250731-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6070 Comm: syz.0.17 Not tainted 6.16.0-next-20250731-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:multiq3_encoder_reset drivers/comedi/drivers/multiq3.c:223 [inline]
RIP: 0010:multiq3_attach+0x5e5/0x950 drivers/comedi/drivers/multiq3.c:316
Code: 89 dc 49 c1 ec 03 45 31 ed 41 80 3c 2c 00 74 08 48 89 df e8 4d 92 2a f9 44 89 e8 83 e0 38 0d 40 06 00 00 8b 13 83 c2 06 66 ef <41> 80 3c 2c 00 74 08 48 89 df e8 2c 92 2a f9 8b 13 83 c2 0e b0 06
RSP: 0018:ffffc90002f07a98 EFLAGS: 00000206
RAX: 0000000000000640 RBX: ffff88814c4521d0 RCX: ffff88804392bc00
RDX: 0000000000004f2d RSI: 0000000020000004 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff1fc6867 R12: 1ffff1102988a43a
R13: 0000000000ed1c80 R14: 1ffff1100f7ae692 R15: 00000000001da391
FS:  0000555587726500(0000) GS:ffff88812580a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb419befbf0 CR3: 00000000325ca000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 comedi_device_attach+0x51c/0x720 drivers/comedi/drivers.c:1006
 do_devconfig_ioctl drivers/comedi/comedi_fops.c:872 [inline]
 comedi_unlocked_ioctl+0x5ff/0x1020 drivers/comedi/comedi_fops.c:2173
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f090a78eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd1bd6b528 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f090a9b5fa0 RCX: 00007f090a78eb69
RDX: 0000200000000180 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007f090a811df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f090a9b5fa0 R14: 00007f090a9b5fa0 R15: 0000000000000003
 </TASK>

final repro crashed as (corrupted=false):
INFO: task syz.3.20:6071 blocked for more than 143 seconds.
      Not tainted 6.16.0-next-20250731-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20        state:D stack:27240 pid:6071  tgid:6071  ppid:5989   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1360 kernel/locking/mutex.c:760
 comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
 chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414
 do_dentry_open+0x953/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f978478eb69
RSP: 002b:00007ffe9aaa1f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f97849b5fa0 RCX: 00007f978478eb69
RDX: 0000000000000400 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f9784811df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f97849b5fa0 R14: 00007f97849b5fa0 R15: 0000000000000004
 </TASK>
INFO: task syz.2.19:6072 blocked for more than 143 seconds.
      Not tainted 6.16.0-next-20250731-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19        state:D stack:27240 pid:6072  tgid:6072  ppid:5986   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1360 kernel/locking/mutex.c:760
 comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
 chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414
 do_dentry_open+0x953/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff100d8eb69
RSP: 002b:00007ffcf1e84a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff100fb5fa0 RCX: 00007ff100d8eb69
RDX: 0000000000000400 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007ff100e11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff100fb5fa0 R14: 00007ff100fb5fa0 R15: 0000000000000004
 </TASK>
INFO: task syz.1.18:6073 blocked for more than 144 seconds.
      Not tainted 6.16.0-next-20250731-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.18        state:D stack:27240 pid:6073  tgid:6073  ppid:5985   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1360 kernel/locking/mutex.c:760
 comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
 chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414
 do_dentry_open+0x953/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf0bb8eb69
RSP: 002b:00007ffc7d038718 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcf0bdb5fa0 RCX: 00007fcf0bb8eb69
RDX: 0000000000000400 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fcf0bc11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcf0bdb5fa0 R14: 00007fcf0bdb5fa0 R15: 0000000000000004
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8e539f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8e539f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8e539f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:11/3003:
2 locks held by getty/5607:
 #0: ffff88814e0d80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by kworker/u9:3/5991:
 #0: ffff8880262d2148 ((wq_completion)hci25){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
 #0: ffff8880262d2148 ((wq_completion)hci25){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3319
 #1: ffffc90003697bc0 ((work_completion)(&hdev->power_on)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3212 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3319
 #2: ffff88804e500dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:428 [inline]
 #2: ffff88804e500dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_power_on+0x1ac/0x680 net/bluetooth/hci_core.c:959
3 locks held by kworker/0:6/6050:
2 locks held by syz.0.17/6070:
1 lock held by syz.3.20/6071:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.2.19/6072:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.1.18/6073:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.4.21/6181:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.6.23/6183:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.7.24/6184:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.5.22/6185:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.8.25/6267:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.0.27/6278:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.9.26/6280:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.1.28/6281:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.2.29/6351:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.3.30/6377:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.5.32/6383:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.4.31/6384:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.6.33/6445:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.7.34/6481:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.9.36/6487:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.8.35/6490:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.0.37/6544:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.1.38/6579:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.2.39/6580:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.3.40/6581:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
1 lock held by syz.4.41/6610:
 #0: ffff88814c4520f8 (&dev->mutex#4){+.+.}-{4:4}, at: comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2863
5 locks held by syz-executor/6611:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-next-20250731-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6070 Comm: syz.0.17 Not tainted 6.16.0-next-20250731-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:multiq3_encoder_reset drivers/comedi/drivers/multiq3.c:223 [inline]
RIP: 0010:multiq3_attach+0x5e5/0x950 drivers/comedi/drivers/multiq3.c:316
Code: 89 dc 49 c1 ec 03 45 31 ed 41 80 3c 2c 00 74 08 48 89 df e8 4d 92 2a f9 44 89 e8 83 e0 38 0d 40 06 00 00 8b 13 83 c2 06 66 ef <41> 80 3c 2c 00 74 08 48 89 df e8 2c 92 2a f9 8b 13 83 c2 0e b0 06
RSP: 0018:ffffc90002f07a98 EFLAGS: 00000206
RAX: 0000000000000640 RBX: ffff88814c4521d0 RCX: ffff88804392bc00
RDX: 0000000000004f2d RSI: 0000000020000004 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff1fc6867 R12: 1ffff1102988a43a
R13: 0000000000ed1c80 R14: 1ffff1100f7ae692 R15: 00000000001da391
FS:  0000555587726500(0000) GS:ffff88812580a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb419befbf0 CR3: 00000000325ca000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 comedi_device_attach+0x51c/0x720 drivers/comedi/drivers.c:1006
 do_devconfig_ioctl drivers/comedi/comedi_fops.c:872 [inline]
 comedi_unlocked_ioctl+0x5ff/0x1020 drivers/comedi/comedi_fops.c:2173
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f090a78eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd1bd6b528 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f090a9b5fa0 RCX: 00007f090a78eb69
RDX: 0000200000000180 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007f090a811df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f090a9b5fa0 R14: 00007f090a9b5fa0 R15: 0000000000000003
 </TASK>